Rising Asking Rents and Displacement Pressure on Chicago's South Side

Abstract

Between 2015 and early 2026, the price of renting a newly listed apartment on Chicago's South Side rose far faster than the area's reputation for disinvestment would lead anyone to expect. This paper traces that climb across 13 South and Southwest Side ZIP codes using the Zillow Observed Rent Index, a monthly asking-rent series, and describes how the index rose between 41 and 81 percent from each ZIP's earliest reading to March 2026. The steepest rises landed in Roseland and West Pullman, in South Shore, and in Bronzeville and Douglas, three of the most historically Black neighborhoods on the South Side ^[1]. We set that descriptive analysis of real public data next to the published gentrification and displacement literature, which has shown for two decades that neighborhood change in Chicago moves unevenly, slows where Black residency is high, and grows more dangerous to sitting renters when public money flows in ^[3][6][8]. One boundary governs the whole paper. An asking-rent index records what landlords seek from incoming tenants. It does not record what current tenants pay, and it cannot show whether anyone was forced to move, so we read these numbers as mounting affordability pressure and not as measured displacement ^[1][10]. We also count the subsidized rental housing already standing in these ZIPs and weigh it against the neighborhoods where market rents are climbing fastest. The buffer is large in places and thin in others, and several of the hottest ZIPs hold among the fewest affordable units. Throughout, we mark where uneven coverage, mismatched baselines, and a static affordable-housing snapshot limit what the data can carry.

A decade on one Roseland block

In the summer of 2016, the first month for which Zillow's index reports a value for the area, the typical apartment coming onto the rental market in ZIP code 60628 was listed at about $882 ^[1]. That ZIP covers Roseland and West Pullman, two neighborhoods near the city's southern edge. The $882 is not the rent any particular family was paying. It is an estimate of what a landlord would ask for a unit newly offered for lease, drawn from listings and adjusted for the quality of the housing stock rather than read off anyone's lease or pay stub ^[10]. By March 2026 that same index for 60628 had reached roughly $1,600 ^[1]. The increase over those nine and a half years comes to 81.4 percent, the largest of any ZIP in the data ^[1]. An apartment a landlord would have listed for the price of a modest one-bedroom in 2016 was, a decade on, listed for close to half again as much.

Roseland is not a neighborhood that shows up in stories about gentrification. Its recent history is one of foreclosure, vacancy, and population loss. Mortgage capital left, jobs left, people left. The familiar account of Chicago's far South Side is decline, not rising rents and incoming demand. The gap between that account and a rent index that nearly doubled is the reason this paper starts here. The number is real, it is public, and anyone can reopen the file and recompute it. What it means is the harder question, and the honest answer needs care from the first paragraph forward.

The decline that account points to is not vague or recent. Roseland was a working-class district built around steel and rail, with the Pullman company town a short distance to the east and the Sherwin-Williams and steel plants of the southeast lakefront within commuting reach. When the Home Owners' Loan Corporation drew its security maps of Chicago in the late 1930s, the agency's surveyors graded most of the Black South Side in red and warned lenders away, and the practice that followed channeled mortgage credit toward white neighborhoods and starved the rest for a generation. The mills that anchored the far South Side economy shed jobs through the 1970s and closed through the 1980s, and the population that had depended on them thinned out behind the work. By the 1990s and 2000s, Roseland and the surrounding ZIPs were among the parts of Chicago losing residents fastest, and the foreclosure crisis after 2008 hit these blocks harder than almost anywhere in the city, leaving vacant frame houses and boarded two-flats along whole stretches. None of that is our data to measure, and we do not measure it. It is the backdrop against which a rising asking-rent index reads as a surprise rather than a continuation, and naming it is part of describing the surprise honestly.

The wider South Side carries versions of the same arc. Bronzeville, the ZIP that posts the second-largest dollar level in our panel, was for decades the dense heart of Black Chicago, hemmed in by restrictive covenants and the color line that kept Black residents from living elsewhere, then thinned by the demolition of the State Street public housing corridor and the slow churn of disinvestment. South Shore held a stable Black middle class through losses that emptied other neighborhoods, and Chatham was long a symbol of Black homeownership and respectability on the South Side. These places do not share a single history, and we do not flatten them into one. They share a recent past in which the dominant direction was out and down, which is exactly why a decade of rising rents across all of them at once is worth a careful look.

So it is worth saying plainly what this paper is. It is a synthesis of published research paired with our own descriptive analysis of public data. We took the Zillow Observed Rent Index for 13 South and Southwest Side ZIP codes, monthly from January 2015 through March 2026, and we described what those numbers do over time, one ZIP at a time ^[1]. We then read that description against the scholarly literature on gentrification and displacement, leaning on the studies set in Chicago. We did not run an experiment. We did not interview residents, follow households as they moved, or ask landlords how they set prices. We built no statistical model that isolates a cause, and we make no causal claim anywhere in these pages. We scraped nothing and generated no data of our own. Every figure we report describes a pattern in a public rent index or in a public list of subsidized housing developments, and every explanation we reach for is handed to the published work, with its authors named. Where we say something happened, the data show it happened. Where we ask why, we cite someone who studied the why.

One distinction recurs on every page, and stating it cleanly here will frame the rest. The Zillow index tracks asking rent, the price at which units are listed and come onto the market. It does not track contract rent, the amount a tenant already living in a unit actually pays ^[1][10]. The two can drift far apart. A household that signed a lease in 2017 and renewed each year since may be paying well under what its own building would ask for a vacant unit in 2026. The index also holds no information about who lives in these neighborhoods, what they earn, or what share of income goes to housing, because it contains no income data of any kind ^[10]. That last absence matters more than any other. Rent burden, the standard yardstick of housing affordability, is rent divided by income, and we cannot compute it here because the data hold only the numerator. When an asking-rent index climbs, the most that climb can establish on its own is that landlords are seeking more from incoming tenants than they once did. It cannot establish that a sitting tenant was forced out, that anyone's rent burden rose, or that the kind of displacement the literature describes took place. We return to that caution often in what follows. It is not a ritual disclaimer. It is the real edge of what an asking-rent series can say.

It is worth understanding how the index is built, because the construction explains both its strengths and its silences. The Zillow Observed Rent Index is a repeat-rent measure ^[10]. Rather than average whatever happens to be listed in a given month, which would swing wildly as the mix of cheap and expensive units on the market changed, the method tracks the same rental units over time and measures how their listed rents move, then controls for the quality of the housing stock and reports a value near the middle of the market, between the 40th and 60th percentiles ^[10]. The design is meant to answer one question well, namely how the rent on a comparable unit is changing, holding the kind of unit roughly fixed. That is a genuinely useful question, and it is why a repeat-rent index is more trustworthy than a raw listings average for tracking change over time. But the same design draws the index's boundary. It observes units as they come onto the market, so it sees the asking side of the transaction and not the renewal side, and it carries forward nothing about the people who live in the units or what they can afford. A measure built to track the price of comparable units cleanly is, by construction, not a measure of who is being priced out. We lean on the index for what it does well and we do not ask it for what it was never built to provide.

The contract-rent gap deserves one more concrete illustration, because it is the hinge of every interpretation in this paper. Imagine two apartments in the same Bronzeville two-flat. The downstairs tenant moved in years ago and has renewed at modest annual increases, so she pays well under the building's current market rate. The upstairs unit falls vacant and is relisted at the going asking rent, which the index records. Zillow's number rises with the upstairs unit and is blind to the downstairs lease. A whole neighborhood can sit in that configuration, with long-tenured renters insulated for now and turnover units repricing upward, and the asking-rent index will climb steadily while a large share of residents feel the increase only at the moment they have to move. That is not a flaw in the data. It is the difference between two real quantities, the rent asked of newcomers and the rent paid by incumbents, and the index measures the first. Reading it as if it measured the second is the single error this paper is most concerned to avoid.

The distinction is not merely academic, and it cuts in a particular direction for anyone who would use these numbers. An asking-rent climb can understate the strain on incumbent renters, because it misses those whose own rents have crept up at renewal without a move, and it can also overstate the strain, because the renters who never face the new asking rent are insulated for as long as they stay. The index tells us what it costs to enter these markets now, which is the relevant number for a household trying to find a place and a useful leading signal of where pressure is building. It does not tell us what it costs to remain, which is the relevant number for the household already there. A reader who wants to know whether South Side renters are being squeezed should treat the asking-rent climb as an early warning about the cost of entry, not as a measurement of the squeeze itself, and should look to the contract-rent and income data the index lacks before concluding anything about the people in place. Keeping those two questions apart is the discipline the rest of this paper tries to hold.

The Voorhees Center at the University of Illinois Chicago built a gentrification index that tracked socioeconomic change across the city's community areas from 1970 to 2010, and its headline result runs against the grain of the rent climb this paper documents. More community areas declined over those four decades than gentrified, and the declines clustered on the far South and West Sides ^[8]. That is the ground our 13 ZIPs cover. For most of the period the Voorhees Center studied, the dominant direction of these neighborhoods, measured by income and education and related indicators, was down. A rent index that rises 40 to 80 percent across this same footprint is not the late innings of a long boom. It is a recent break from a much longer record of disinvestment, and that is part of what makes it worth describing with care. The rest of this paper is an attempt to say how large the break is, when it arrived, and how much weight it can bear.

Thirteen ZIPs on the same climb

Roseland is not alone. Widen the frame from that one ZIP to the full panel of 13, and the same upward motion shows up nearly everywhere, steeper in some places and gentler in others but pointing one way. Measured from each ZIP's first populated month to March 2026, asking rents rose between 41.0 percent and 81.4 percent, with a median across the 13 of 64.6 percent ^[1]. A median near 65 percent over roughly a decade is not the story of one odd neighborhood. It is the story of a side of a city.

The fastest climbs cluster in a recognizable set of places. Roseland and West Pullman lead at 81.4 percent, the figure that opened this paper, its index moving from about $882 to roughly $1,600 ^[1]. South Shore, ZIP 60649, follows at 74.9 percent, from about $787 to $1,377 ^[1]. Bronzeville and Douglas, ZIP 60653, sit just behind at 74.3 percent, from about $1,175 to $2,049 ^[1]. These three rose fastest in the panel, and all three are among the South Side's most storied Black neighborhoods, a coincidence of geography and rent growth we come back to when the Chicago literature enters. Just below them, Chatham and Avalon Park, ZIP 60619, rose 71.9 percent, from about $794 to $1,366, and Auburn Gresham, ZIP 60620, rose 69.0 percent, from about $864 to $1,460 ^[1].

The middle of the panel is no less striking for being less extreme. South Chicago and East Side, ZIP 60617, rose 64.7 percent, and Woodlawn, ZIP 60637, rose 64.6 percent, the median ZIP in the distribution, its index climbing from about $1,068 to $1,758 ^[1]. Pilsen and Little Village, ZIP 60608, the one heavily Latino area in the panel, rose 61.9 percent, from about $1,151 to $1,863 ^[1]. Beverly and Morgan Park, ZIP 60643, rose 59.7 percent, and Back of the Yards and New City, ZIP 60609, rose 58.9 percent ^[1]. Hyde Park and Kenwood, ZIP 60615, the neighborhood around the University of Chicago, rose 57.7 percent, from about $1,281 to $2,020 ^[1].

At the slower end the rise is gentler but still large. Englewood, ZIP 60621, rose 42.9 percent, and Near South and Bridgeport, ZIP 60616, posted the smallest cumulative growth in the panel at 41.0 percent, its index moving from about $1,237 to $1,744 ^[1]. Even the floor of this distribution is an index up by more than 40 percent. No ZIP in the panel held flat, and the distance from the floor at 41 percent to the ceiling at 81 percent is itself worth holding onto. The South Side did not rise uniformly. It rose everywhere, and it rose roughly twice as fast at the top of the range as at the bottom.

The asking-rent caution earns its first concrete use right here. Every percentage in the paragraph above describes how much more landlords were listing units for, not how much more sitting tenants were paying ^[1][10]. A neighborhood can show 75 percent growth in its asking-rent index while a long-tenured renter down the block faces a far smaller bump at renewal, and while the unit next door turns over to a newcomer who pays the full new rate. The index speaks to the price of entry into these markets. It says nothing about the people already inside them. When we report that South Shore's asking rent rose three-quarters over the window, that is the whole of the claim.

A second caveat bites at this first cross-ZIP comparison, and honesty puts it next to the numbers rather than ten pages on. The 13 ZIPs do not all enter the Zillow panel in the same month. The index withholds a ZIP-month whenever the underlying signal is too thin to publish a reliable value, and it never backfills the gap with an estimate ^[10]. Of 1,755 possible ZIP-months across the panel, 13 ZIPs times 135 monthly columns, only 1,437 carry a value, about 81.9 percent, and the blanks stay blank ^[1]. The consequence is that the cumulative-growth figures just reported are measured over windows of different lengths.

The coverage varies more than a single completeness figure conveys, so it is worth laying out. Four ZIPs carry values all the way back to the index's first month in January 2015, namely South Shore, Auburn Gresham, Near South and Bridgeport, and Woodlawn, giving each of them 132 to 135 monthly readings ^[1]. Hyde Park enters two months later, in March 2015 ^[1]. Pilsen and Little Village joins in December 2015, Chatham and South Chicago in May 2016, and Roseland in July 2016 ^[1]. Bronzeville does not appear until February 2017, Back of the Yards until April 2018, Englewood until November 2021, and Beverly and Morgan Park only in April 2023, which leaves Beverly with just 36 monthly readings against South Shore's 135 ^[1]. A few ZIPs also carry small internal gaps even after they enter, two missing months for South Chicago and three for Woodlawn, blanks the index left rather than guessed ^[1]. The practical effect is plain. Beverly and Morgan Park does not appear until April 2023, so its 59.7 percent growth runs over roughly three years, while South Shore's 74.9 percent runs over eleven. An 81 percent climb measured since 2016 and a 60 percent climb measured since 2023 are not on the same footing, so a reader should treat the exact ordering through the middle of the pack as softer than the headline range. The next section meets this head on by rerunning the comparison from a single shared baseline, which costs three ZIPs and buys a cleaner read of the shape.

Why is a broad rent climb across these particular neighborhoods worth flagging, rather than what one would expect of any housing market over a decade? Because, again, the long history of this exact terrain runs the other way. The Voorhees Center's gentrification index measured socioeconomic change across all of Chicago's community areas from 1970 to 2010, and its central result was that more community areas declined than gentrified over those four decades, with the declines concentrated on the far South and West Sides ^[8]. The places that lost ground on income, education, and related measures were, in large part, the places our panel covers. For most of that period the dominant trajectory of these neighborhoods was down, the opposite of the upward sorting the word gentrification usually conjures. A rent index that climbs 40 to 80 percent across the same footprint is therefore not the continuation of a long boom. It is a recent reversal of a much longer decline, and the reversal, not the bare fact of rising rents, is the thing that needs explaining. Much of the rest of this paper is an effort to say how large the reversal is, when it arrived, and how far it can be pressed before the data give out.

When the climb steepened

Knowing that rents rose is not knowing when. A cumulative figure, 81 percent here or 41 percent there, packs a decade into one number and hides the timing inside it. To recover the timing we put the ZIPs on a common starting line and watch the curves move month by month. Indexing each ZIP to 100 in January 2018 compares the shape of the rise rather than the dollar level. The question shifts from how expensive a neighborhood is to how far above its own 2018 footing it has traveled ^[1].

That shared baseline carries a cost worth naming before the result. Only 10 of the 13 ZIPs have a populated value in January 2018 ^[1]. The other three, Back of the Yards and New City, Beverly and Morgan Park, and Englewood, enter the panel after that month and cannot be rebased to it ^[1]. We drop them from this view. The indexed trajectories below describe 10 ZIPs, not 13, and the three that fall away are the same late entrants flagged a moment ago. This is the cleanest timing comparison the data allow, and it rests on a subset.

Within that subset the divergence by March 2026 is wide. Roseland and West Pullman reaches an index of 178, meaning its asking rent stood about 78 percent above the January 2018 level ^[1]. Bronzeville and Douglas reaches 165, about 65 percent above ^[1]. South Chicago and East Side follows at 163, and Chatham at 157 ^[1]. Auburn Gresham reaches 156 and South Shore 153, both more than half again above their 2018 footing ^[1]. Woodlawn lands at 149 and Pilsen at 145 ^[1]. Toward the bottom, Hyde Park sits at 137 and Near South and Bridgeport at 132, roughly 32 percent above its 2018 level ^[1]. The mean indexed level across the 10 ZIPs is 154, so the typical South Side ZIP in this view ended the period about half again as expensive to rent into as it had been eight years earlier ^[1]. The distance between fastest and slowest, 178 against 132, is itself a finding. These neighborhoods did not move in lockstep. The far South Side ZIPs that began deepest in disinvestment rose most steeply from their 2018 base, and the ZIP nearest downtown rose least.

The ordering is worth pausing on, because it is close to the inverse of what a North Side gentrification story would predict. The ZIPs that climbed most from their 2018 base, Roseland, Bronzeville, South Chicago, Chatham, are not the ones nearest downtown or nearest the lakefront amenities that usually pull rents up first. The ZIP that climbed least, Near South and Bridgeport, is the one closest to the Loop. Whatever lifted asking rents across this subset was not a simple gradient radiating out from the central business district. It reached the far South Side ZIPs hard, and it touched the near-in ZIP comparatively lightly. We do not have the data to say why, and we will not guess, but the pattern itself is the kind of thing a reader should see rather than have summarized away.

The intermediate waypoints fill in the path between 2018 and 2026, and they tell a consistent story across the subset. Through January 2020, before the pandemic, the indices had moved only modestly, most sitting between 104 and 110 ^[1]. Roseland stood at 109, Bronzeville at 110, Near South at 107 ^[1]. By June 2021 the spread had widened a little, with Roseland and Bronzeville both at 119 while Near South lagged at 111 ^[1]. The sharper separation comes after that. By June 2022 Roseland and Bronzeville had reached 132 while Near South sat at 118, and by January 2024 Roseland was at 146 against Near South's 125 ^[1]. The final leg, from early 2024 to March 2026, is the steepest of all for the fastest ZIPs, carrying Roseland from 146 to 178 and Bronzeville from 141 to 165 ^[1]. The gap between the fastest and slowest ZIPs in the subset, narrow in 2018, opens steadily across the window and widens most in its final two years.

The shape matters as much as the endpoints, and the shape is not a straight line. Read the trajectories forward from 2018 and the curves rise gently through 2019 and 2020, then bend up more sharply after 2021 ^[1]. The acceleration sits in the later years of the window, not spread evenly across it. That bend is the most important feature of this section, and it is also where caution about cause is most necessary, because a steepening curve invites a story and the data do not supply one.

The published literature gives a vocabulary for reading that post-2021 bend without overreaching. Zuk and colleagues, in a systematic review of gentrification, displacement, and the role of public investment, reached two conclusions that bear here ^[6]. Public investment in a neighborhood, whether transit, parks, or a large institutional project, can intensify displacement pressure on the residents already there. And gentrification and displacement must be kept analytically distinct rather than treated as one thing ^[6]. The second point is more than a definitional nicety. A neighborhood can gentrify, by the usual markers of rising incomes and changing demographics, without any particular household being forced out, and a household can be displaced from a neighborhood that is not gentrifying at all, pushed by rising costs or a lost unit regardless of who moves in next. Folding the two together, so that evidence of one is taken as evidence of the other, is the error the review is built to guard against. Applied to our curves, that review counsels a particular posture. A stretch in which asking rents bend upward is a stretch to watch closely, because it is the kind of moment when public investment, if it is happening, could be adding pressure. It is not by itself evidence that any specific investment caused the rise, and it is nowhere near evidence that displacement followed. The review's discipline is to name the pressure and withhold the verdict. We adopt that posture for the years after 2021.

The point about public investment is one we are positioned to state only in the abstract, and the limit is instructive. The far South Side has seen real public and institutional investment in recent years, and the review's finding is that such investment can raise displacement pressure on incumbent renters even when it is intended to help ^[6]. But our data cannot connect any specific project to any specific rent movement. We observe an index across ZIP codes and months. We do not observe what was built, when, or where within a ZIP, and we have run no analysis capable of attributing a rent change to a cause. So we take from Zuk and colleagues a reason to watch the post-2021 bend with particular care, and a warning against treating the bend as proof that any one investment drove it. The honest move is to hold the mechanism the review documents next to a pattern our data can show, and to stop at the seam between them.

Hwang and Lin, reviewing what researchers have actually learned about the causes of recent gentrification, push the same way from another angle ^[4]. Their survey catalogs a long list of plausible drivers, including demographic shifts, a renewed taste for central-city living, credit and macroeconomic conditions, and the changing geography of employment, that operate at the scale of whole metropolitan areas and the national economy rather than a single block ^[4]. The lesson for our data is direct. When asking rents across an entire side of Chicago bend upward in the same few years, the likeliest explanations include forces that are citywide or national, not local. A surge appearing across 10 South Side ZIPs at once fits broad pressure on the regional rental market better than anything peculiar to Roseland or Bronzeville. The timing reinforces the point. The bend follows 2021, a period when rents rose sharply across much of the country as the rental market reopened and tightened, which is exactly the kind of broad shock Hwang and Lin's review would lead one to expect to register everywhere at once. Our data cannot localize the cause, and the review explains why we should not try to.

The asking-rent boundary stays live through all of this. A curve that bends upward shows landlords asking more of new tenants in the years after 2021 ^[1][10]. It does not show that incumbent renters were pushed out, that their burdens rose, or that the neighborhoods turned over. The shape tells us when the market-rate pressure intensified. It does not tell us who absorbed it.

The hottest years

The indexed trajectories show a bend. The year-over-year record sharpens that bend into specific transitions. Switching from a common-baseline index to a plainer measure, the change in each ZIP's asking rent from one December to the next, lets us ask which single years did the most work in the decade-long climb ^[1]. Averaging that December-to-December change across the ZIPs that report both endpoints turns a smooth curve into a run of annual jumps and pauses.

The standout is the first post-pandemic year. From December 2021 to December 2022, asking rents across the 12 reporting ZIPs rose by an average of 7.8 percent, the hottest single-year transition in the record, with one ZIP up 16.0 percent over that year alone ^[1]. The transition from December 2024 to December 2025 runs a close second at 7.4 percent on average ^[1]. Against those, the coolest year in the data, December 2016 to December 2017, comes in at 2.6 percent ^[1]. The distance between the hottest and coolest years, 7.8 against 2.6, is the difference between a market lurching and a market drifting.

What the year-over-year view adds to the indexed trajectories is confirmation that the acceleration is genuinely recent and not a long, steady inheritance. The full sequence of annual averages reads as a slow warm-up followed by a sharp turn. The 2015-to-2016 transition averaged 4.0 percent across the 6 ZIPs then reporting, and 2016-to-2017 cooled to 2.6 percent, the lowest in the record ^[1]. Then the averages step up unevenly, 3.3 percent across 2017 to 2018, 4.3 percent across 2018 to 2019, and 3.5 percent across 2019 to 2020 ^[1]. Those late-2010s figures are modest annual increases, the kind that roughly track ordinary cost-of-living drift. The turn comes after the pandemic. The 2020-to-2021 transition averaged 5.8 percent, the 2021-to-2022 transition 7.8 percent, the 2022-to-2023 transition 5.3 percent, the 2023-to-2024 transition 5.9 percent, and the 2024-to-2025 transition 7.4 percent ^[1]. Every one of the five most recent transitions ran above every one of the five earliest. The jump from a pre-pandemic pace in the 3-to-4 percent range to a post-pandemic pace in the 5-to-8 percent range is a real change in tempo, not more of the same. Whatever pressure these neighborhoods are under, it is recent. A reader picturing a slow four-decade simmer would be reading the wrong decade. The heat sits in the 2020s.

The within-year spread is as telling as the averages, and the source data carry it. In the cool early years the range across ZIPs was narrow, with the 2016-to-2017 transition running from 0.0 percent at the bottom to 7.6 percent at the top ^[1]. By the hot years the range had blown open. The 2021-to-2022 transition ran from 3.8 percent to 16.0 percent across the 12 reporting ZIPs, and the 2024-to-2025 transition from minus 0.7 percent all the way to 28.6 percent across all 13 ^[1]. A few transitions even carried small negative readings at the bottom of the range, with one ZIP down 2.7 percent across 2019 to 2020 and another down 1.5 percent across 2023 to 2024 ^[1]. The South Side rental market did not move as a block. In the years of fastest average growth, some ZIPs were nearly flat while others surged, which is a reminder that an average across 13 ZIPs can hide a wide range of neighborhood experiences underneath it.

The thinness of the early panel demands a matching caution, and it cuts against over-reading the early years in particular. The number of ZIPs contributing to each annual average grows as more ZIPs enter the index. The 2015-to-2016 transition rests on 6 ZIPs, while 2023-to-2024 and 2024-to-2025 draw on all 13 ^[1]. Early averages therefore sit on a smaller and less representative base, and a single neighborhood can swing them. The extremes make the same point. The largest single-ZIP reading in the 2024-to-2025 transition was 28.6 percent, so far above that year's 7.4 percent average that it can only reflect small-sample volatility in one ZIP rather than anything a typical South Side renter would recognize ^[1]. We report the averages because they are informative about tempo, and we flag the spread because the averages are not equally solid year to year. The shape of the story, cool early and hot late, survives that caution. The precision of any single early figure does not.

Why does a sharp post-pandemic jump in asking rent matter for affordability, when the index alone cannot say who moved? The Institute for Housing Studies at DePaul University supplies the connecting logic in its 2020 mapping of displacement pressure across Chicago ^[9]. That work frames displacement pressure as the joint product of two conditions, lower-income renters who are already cost-burdened and a low-cost rental supply that is shrinking, working together in places where rental costs are rising ^[9]. Read through that frame, a 7.8 percent jump in one year is not merely a market statistic. It is exactly the rising-cost condition that, where it lands on already-burdened renters and a thinning stock of cheap units, the Institute identifies as generating displacement pressure ^[9]. Our index can measure the rising-cost part of that equation, and only that part. It cannot measure how many renters were already burdened, or whether the low-cost supply shrank, because it holds no income data and no record of the broader stock ^[1][10]. The framework tells us why the rent jump is worth taking seriously. It also marks, exactly, the limit of what one dataset can confirm.

Not one South Side

Growth rates can mislead if read alone. A neighborhood that posts the largest percentage increase is easy to picture as the most expensive, and on the South Side that picture would be wrong. To correct it, set the growth figures aside and look at dollar levels, the actual listed rent each ZIP's index reports in the final month of the data, March 2026 ^[1].

The dispersion is wide. At March 2026 the dollar index runs from $1,366 in Chatham and Avalon Park, ZIP 60619, at the low end, to $2,344 in Beverly and Morgan Park, ZIP 60643, at the high end ^[1]. That is a spread of $978 a month between the cheapest and priciest ZIP in the panel, a ratio of 1.72 to 1, with a mean across the 13 ZIPs of $1,727 ^[1]. The South Side is not one rental market. The gap between renting into Chatham and renting into Beverly is nearly a thousand dollars a month, larger than the entire monthly rent some of these neighborhoods commanded a decade earlier. Treating these 13 ZIPs as a single undifferentiated zone, whether of affordability or of pressure, would flatten a real and substantial internal range.

The full ranking sorts the South Side into a recognizable order. At the bottom sit Chatham at $1,366 and South Shore at $1,377, two majority-Black neighborhoods that posted some of the steepest growth in the panel yet remain among the least expensive places to rent into ^[1]. Auburn Gresham follows at $1,460, then Back of the Yards at $1,577 and South Chicago at $1,590 ^[1]. Roseland, the growth leader, sits in the middle of the dollar distribution at $1,600, followed by Englewood at $1,696 and Near South and Bridgeport at $1,744 ^[1]. Woodlawn comes next at $1,758, then Pilsen at $1,863 ^[1]. The three priciest ZIPs are Hyde Park at $2,020, Bronzeville at $2,049, and Beverly and Morgan Park at $2,344 ^[1]. Hyde Park's place near the top is unsurprising given the University of Chicago and its surrounding investment, and Beverly has long been a higher-income enclave on the far Southwest Side. The order is not random. It tracks the neighborhoods' longer economic histories, which is precisely why the growth ranking, which scrambles that order, is the more arresting of the two views.

Set the dollar levels beside the growth rates and the central tension of this paper comes into focus. The fastest-growing ZIPs are not the most expensive ones. South Shore grew 74.9 percent, second-steepest in the panel, yet at $1,377 it sits near the very bottom of the dollar distribution, just above Chatham ^[1]. Beverly, the priciest ZIP at $2,344, grew a comparatively moderate 59.7 percent ^[1]. The arithmetic behind the apparent paradox is plain. A neighborhood that started cheap can post a large percentage gain and still end up inexpensive, because a big percentage of a small base is a small dollar figure. South Shore's index began around $787 in 2015, so even a three-quarters increase leaves it under $1,400 ^[1]. Beverly entered the panel late and high, near $1,468 in 2023, so a more modest percentage climb still carries it past $2,300 ^[1]. The lesson is to keep the two measures apart. Where rents are rising fastest and where rents are highest are different maps of the same South Side, and conflating them distorts both.

This heterogeneity is where the foundational displacement debate becomes useful, because uneven levels and uneven growth are exactly the conditions under which the link between rising rents and displacement turns out to be loose rather than mechanical. The most influential challenge to the assumption that rising rents simply push the poor out came from Freeman and Braconi, whose study of New York City in the 1990s reached a counterintuitive and much-contested result ^[2]. The intuition they tested is the one almost everyone starts with, that when rents rise in a neighborhood, the low-income residents who can least afford the increase must be the ones who leave, so gentrifying neighborhoods should show higher out-mobility among the poor. Examining residential mobility across New York neighborhoods, they found the opposite of what that intuition predicts. Out-mobility of low-income residents was not higher in gentrifying neighborhoods, and in some specifications was lower, than in neighborhoods that were not gentrifying ^[2]. One proposed reading is that low-income tenants in improving neighborhoods sometimes hold on longer, staying put to keep access to a place that is getting better, with better services and safer streets, even as rents climb around them, so that the improvement gives them a reason to endure the cost rather than flee it. The finding has been contested in the two decades since, and it does not say displacement never happens. It says the simple arithmetic, rising rents equals departing poor, does not hold up cleanly even in a textbook gentrifying city, which is a sharp warning against reading a displacement count off a rent index.

Freeman extended that line of work in a later study that gave the caution its working vocabulary, drawing a careful line between displacement, in which a household is forced out by rising costs or direct pressure, and ordinary residential succession, in which households move for the usual run of reasons, jobs, family, the normal churn of urban life, and are gradually replaced by higher-income arrivals as units turn over ^[7]. The distinction is not pedantic. In any neighborhood, gentrifying or not, a substantial share of renters move in any given year for reasons that have nothing to do with rent. When the replacements happen to be wealthier, the neighborhood's composition shifts through succession, even though no one was pushed. Displacement is the narrower and harder case, a move that would not have happened but for the pressure, and it requires evidence about why people left, not just evidence that the neighborhood changed. A neighborhood can therefore see both its asking rents and its resident mix change without those being the same event, and without the rent rise having forced anyone out. Our data observe the asking rents. They observe neither the resident mix nor the reasons anyone moved, so they cannot place a single household on either side of Freeman's line.

For our data, those two findings counsel a specific restraint. Uneven rent levels and uneven rent growth across the 13 ZIPs do not, on their own, translate into uniform displacement across those ZIPs ^[2][7]. A ZIP that grew 75 percent and a ZIP that grew 41 percent are not thereby two displacement rates, because the path from asking rent to who actually leaves runs through all the factors Freeman's succession-versus-displacement distinction names, and is, on the New York evidence, not even reliably positive ^[2][7]. We can describe the rent dispersion precisely. We cannot read a displacement pattern off it.

The dispersion does carry one implication we can defend, which is about how the South Side should be talked about rather than about who moved. A $978 gap between the cheapest and priciest ZIP, a 1.72-to-1 ratio, is wide enough that policy aimed at the average misses most of the territory ^[1]. A program calibrated to the panel mean of $1,727 would be too generous for a renter in Chatham at $1,366 and too thin for one in Beverly at $2,344, and the same is true of any single number meant to stand in for the whole ^[1]. The growth figures scatter the neighborhoods one way and the dollar figures scatter them another, with South Shore near the bottom on price and near the top on growth, Beverly the reverse ^[1]. Anyone reasoning about affordability on the South Side has to hold both axes at once, because a neighborhood can be cheap and fast-rising, expensive and slow-rising, or any combination, and the policy that fits one corner of that space will not fit the others. The single most useful thing the dispersion shows is that "the South Side rental market" is a convenient phrase for at least a dozen different markets.

The Chicago-specific work sharpens that caution into something pointed about this particular geography. Hwang and Sampson, studying the pace of gentrification across Chicago neighborhoods, used a fine-grained method to track visible signs of neighborhood reinvestment block by block, and found that gentrification was negatively associated with the concentration of Black and Latino residents ^[3]. The relationship was not linear. It attenuated sharply above roughly a 40 percent Black population share, meaning that past that threshold the visible markers of gentrification slowed or stalled even where other conditions, location and housing stock and the like, might have predicted change ^[3]. In plain terms, the reinvestment that swept some Chicago neighborhoods tended to stop at the edges of heavily Black areas, or to move through them far more slowly than a colorblind model would expect. That finding speaks straight to the steepest-rising ZIPs in our panel. Roseland, South Shore, Bronzeville, and Chatham are majority-Black neighborhoods, well above the share at which Hwang and Sampson found gentrification's pace to attenuate ^[3]. The implication is that whatever drives the asking-rent increases we observe in these ZIPs, it operates in a demographic setting where the North Side pattern, a rapid in-sorting of higher-income and disproportionately white residents, has historically not unfolded the same way ^[3]. Real rent pressure and a different neighborhood-change dynamic can coexist, and on the South Side, the literature suggests, they do.

The Philadelphia evidence points the same direction on what happens to residents when neighborhoods do change. Ding and Hwang, studying the consequences of gentrification for residents' financial health, found that gentrification was associated with gains in credit scores for residents who stayed, but that those gains were smaller for less-advantaged residents and for Black residents than for others ^[5]. The effects, in other words, were real but uneven, and they tilted away from the most vulnerable. That is a different question from displacement, and it is set in a different city, so we import it carefully. But it reinforces the same posture our Chicago evidence calls for. Neighborhood change does not land on everyone the same way, its benefits and its pressures distribute unequally, and the residents with the least cushion tend to capture the least of the upside. Reading our South Side rent climb through that uneven-effects lens is more faithful to the literature than reading it through a uniform mass-displacement story that the evidence, here and elsewhere, does not support. That is one more reason to describe what we see as mounting affordability pressure on renters in place rather than to import a displacement narrative built on neighborhoods that do not resemble these.

The affordable buffer

A reader who has followed the rent numbers this far has a fair question waiting. If asking rents on the South Side have climbed this much and this recently, what stands between a rising market and the households already living there? Part of the answer, only part, sits in a second real dataset, the City of Chicago's file of affordable rental developments. We bring it in as a descriptive cross-reference and nothing more, a way to size the existing subsidized stock against the ZIPs where market rents are moving fastest. It is not a measure of need, and it cannot speak to displacement. It is a count of buildings and units that already exist, joined to our rent ZIPs by ZIP code.

Start with an honest correction, because the planning notes for this analysis carried a number the real file does not produce. An early sketch put 256 affordable developments inside this South Side footprint. The verified city file does not yield that figure. What the file holds is 598 affordable rental developments and 29,550 units citywide, and of those, 207 developments and 12,332 units fall inside the 13 ZORI ZIPs in our panel ^[1]. That is 35 percent of the city's affordable developments and 42 percent of its affordable units sitting inside this one South Side footprint ^[1]. We do not use the 256 figure. We report what the file contains, which is a meaningfully large share of Chicago's subsidized rental housing concentrated in exactly the community areas this paper tracks.

That concentration is itself worth sitting with for a moment. These 13 ZIPs are a slice of one side of the city, yet they hold more than four in ten of all the subsidized rental units in Chicago ^[1]. The number reflects a long policy history, decades in which public and subsidized housing was sited disproportionately on the South Side, in the same neighborhoods that redlining and disinvestment had already marked. The subsidized stock is dense here in part because the need has been treated as dense here, and in part because the politics of where affordable housing gets built have long pushed it toward neighborhoods with the least power to refuse it. We are not measuring that history with the city file, and we do not try. But it is the reason the affordable buffer is as large as it is in this footprint, and it is the reason a reader should not mistake a large citywide share for an adequate buffer. A high concentration of subsidized units in a few South Side ZIPs is consistent with both a real cushion and a long pattern of housing the city's poorest residents in its most disinvested neighborhoods. Both readings are true at once, and the count alone cannot weigh them.

So the buffer is real, and at the citywide scale it is substantial. The harder fact is how unevenly it sits across the 13 ZIPs. The affordable stock concentrates heavily in a handful of neighborhoods. Bronzeville and Douglas, ZIP 60653, alone holds 45 developments and 3,483 units, by a wide margin the largest concentration in the panel and more than a quarter of all the affordable units in the footprint ^[1]. Woodlawn, ZIP 60637, holds 1,274 units across 31 developments. Back of the Yards, ZIP 60609, holds 1,207. Near South and Bridgeport, ZIP 60616, holds 1,175. Pilsen and Little Village, ZIP 60608, holds 1,085 across 38 developments ^[1]. Those five ZIPs carry most of the footprint's subsidized housing between them.

Set that distribution next to the rent-growth ranking from earlier, and the mismatch becomes the point. Several of the ZIPs where asking rents rose fastest hold comparatively little affordable stock. South Shore, ZIP 60649, saw asking rents climb 74.9 percent, the second-steepest in the panel, yet holds about 380 affordable units across 5 developments ^[1]. Chatham and Avalon Park, ZIP 60619, up 71.9 percent, holds roughly 296 units across 4 developments, the fewest in the panel ^[1]. Roseland and West Pullman, the ZIP that opened this paper at plus 81.4 percent, holds 742 units across 11 developments, more than South Shore or Chatham but a fraction of what Bronzeville carries ^[1]. Auburn Gresham, ZIP 60620, up 69.0 percent, holds about 470 units across 8 developments, and South Chicago and East Side, ZIP 60617, up 64.7 percent, holds about 384 units across 5 developments ^[1]. The places climbing hardest are, Bronzeville partly excepted, not the places with the deepest subsidized cushion.

Laid out in full, the per-ZIP counts make the unevenness hard to miss. Bronzeville holds 3,483 units, Woodlawn 1,274, Back of the Yards 1,207, Near South and Bridgeport 1,175, and Pilsen 1,085, the five deepest reserves ^[1]. Then the numbers fall off sharply. Englewood holds 846 units, Hyde Park 838, Roseland 742, Auburn Gresham 470, South Chicago 384, South Shore 380, Chatham 296, and Beverly and Morgan Park just 152 ^[1]. The contrast between the top and bottom of that list is stark. Bronzeville's 3,483 units are more than twenty times Beverly's 152 and more than eleven times the 296 in Chatham. Some of that tracks need and history, since Bronzeville's stock reflects decades of public and subsidized housing on the near South Side, but the consequence for the present is that the cushion is piled high in a few ZIPs and spread thin across the rest. A renter priced out of a turnover unit in Chatham or South Shore is looking at a far shallower pool of subsidized alternatives in the same ZIP than a renter in Bronzeville or Woodlawn.

The pairing that most rewards attention is growth against stock, ZIP by ZIP. The four fastest-rising ZIPs in the panel, Roseland at 81.4 percent, South Shore at 74.9, Bronzeville at 74.3, and Chatham at 71.9, hold between them a wildly uneven share of affordable units, with Bronzeville's 3,483 dwarfing Roseland's 742, South Shore's 380, and Chatham's 296 ^[1]. Three of the four hottest markets, in other words, sit on some of the thinnest subsidized inventories in the footprint, and only Bronzeville pairs fast growth with a deep reserve. That single observation, fast rent growth meeting thin affordable stock in South Shore, Chatham, and to a lesser degree Roseland, is the closest this paper comes to locating where the affordability question presses hardest. We state it as a description of two side-by-side measures and nothing more.

We want to be emphatic about what this comparison is and is not before any reader carries it too far. This is a static snapshot. The city file records developments that exist, with no build dates attached, so it cannot show whether affordable stock in any ZIP grew, held steady, or shrank as market rents rose ^[1]. A ZIP with many units today might have had few a decade ago, or the reverse, and the file is silent on that. The join is also coarse. We matched developments to ZIPs by ZIP code alone, and the neighborhood labels we attach are approximate because a single ZIP can span several community areas, so a unit count assigned to a ZIP is not a unit count for a named neighborhood ^[1]. One row in the city file carries a non-numeric unit count and is treated as zero units, a small but real imprecision in the totals ^[1]. None of these counts is evidence that affordable housing caused a rent movement, prevented one, or responded to one. The ratio of subsidized units to rising rents is descriptive. It describes the size of an existing buffer against the location of market pressure, and it stops there.

There is a further reason for restraint that the snapshot itself cannot resolve. The subsidized stock these counts capture is only one piece of a neighborhood's affordable housing. Much of the cheap rental supply in places like these is not formally subsidized at all. It is older, smaller, privately owned buildings, two-flats and small apartment houses and basement units, that rent below the market because of their age and condition rather than because of any program. That unsubsidized affordable stock is exactly the supply the displacement literature warns can shrink fastest when a market heats up, as older buildings are renovated, converted, or relisted at higher rents, and our file does not see it at all. So the affordable counts we report are a floor on the affordable supply, not a measure of it, and the part of the supply most exposed to a rising market is the part we cannot observe. We flag this not to undercut the counts but to keep a reader from mistaking the subsidized inventory for the whole cushion.

Held inside those limits, the cross-reference still earns its place. The Institute for Housing Studies framed displacement pressure in its 2020 Chicago mapping as the product of two forces moving together, cost-burdened lower-income renters on one side and a shrinking supply of low-cost rental housing on the other, with the squeeze worst where rental costs are climbing ^[9]. Our rent index speaks directly to the climbing-cost half of that frame. The affordable-stock file speaks, imperfectly and statically, to the supply half, by showing how thin the formal subsidized inventory is in several of the hottest ZIPs. We cannot measure shrinkage, and we will not pretend to. What we can say is that in the South Shores and Chathams of this panel, a fast-moving market meets a modest subsidized buffer, and the framework the housing scholars built calls that precisely the combination worth watching. The per-ZIP detail behind these counts sits in the Rooted Forward data archive for any reader who wants to check the join or push it further ^[1].

What the numbers can and cannot say

Every section of this paper has carried the same boundary, and it is time to set it down in one place and look at it directly. An asking-rent index measures market-rate pressure, not displacement. The Zillow series tracks what landlords list when a unit comes onto the market, computed from repeat observations of the same rentals, controlled for the quality of the stock, and reported between the 40th and 60th percentiles ^[10]. It holds no income data and no record of what sitting tenants pay under existing leases, and it does not follow households when they move ^[1][10]. That single fact governs how far any of these numbers reach. A rising index tells us landlords are asking more of incoming renters. It does not tell us that a household was priced out, that anyone left who wanted to stay, or that the people living in these ZIPs now differ from the people who lived there a decade ago. Displacement is a claim about who moved and why, and an asking-rent index is the wrong instrument for it.

The data limits stack on top of that conceptual one, and they belong together rather than scattered. Coverage in the Zillow panel is incomplete. Only 1,437 of 1,755 possible ZIP-months are populated, about 81.9 percent, because the index withholds a ZIP-month when the underlying signal is too thin, and the blanks are never filled in ^[1]. That incompleteness has consequences the reader has already met. The cumulative-growth comparison mixes baselines, since ZIPs enter the panel in different months, with Beverly and Morgan Park starting only in 2023 over a 36-month window while South Shore and several others run from 2015 ^[1]. The indexed-trajectory view fixed the baseline problem by rebasing everything to January 2018, but only by dropping the three ZIPs that lack that month, namely Back of the Yards, Beverly and Morgan Park, and Englewood, so the cleaner comparison covers 10 ZIPs rather than 13 ^[1]. The year-over-year record rests on a thin and growing panel in its early years, with only 6 ZIPs reporting the 2015-to-2016 transition against all 13 by 2023-to-2024, which is why the early averages are less stable and why a single extreme reading like the plus 28.6 percent maximum in 2024-to-2025 reflects small-sample volatility in one ZIP rather than a typical neighborhood ^[1]. The affordable-housing snapshot is static and ZIP-joined, with no build dates and approximate neighborhood labels, as the previous section laid out ^[1]. We list these not to undercut the findings but to mark their edges precisely, so the reader knows where the firm ground ends.

What survives all of that is still substantial. Asking rents rose between 41.0 and 81.4 percent across these 13 ZIPs from each one's first populated month, a median of 64.6 percent, and the climb bent upward after 2021 rather than rising on a straight line ^[1]. Those are real movements in real public data, and the caveats shape their meaning without erasing them. The honest work now is to read that descriptive pattern against what the displacement literature has established, neither forcing the numbers into a displacement story they cannot support nor waving them off as noise.

The literature offers a set of cautions and a set of expectations, and they pull in instructive directions. On the cautionary side, two findings warn directly against the inference a reader is most tempted to draw. Freeman and Braconi's much-cited New York study found that out-mobility of low-income residents was not higher in gentrifying neighborhoods, and was sometimes lower, which says that the simple equation of rising rents with departing poor does not survive contact with the data even in a city where gentrification was unmistakable ^[2]. Freeman's later work gave that caution its vocabulary by separating displacement, where households are pushed out by pressure they could not absorb, from ordinary residential succession, where neighborhoods change as people move for the usual reasons and are gradually replaced by higher-income arrivals as units turn over ^[7]. The two processes can produce the same before-and-after picture of a changed neighborhood while being entirely different events, and only one of them is displacement. Our index sees the rents and not the moves, so it cannot tell the two apart, and the literature is explicit that we should not assume the harsher one without the evidence that would distinguish it.

Pulling the other way are findings that tell us why rising rents on the South Side are worth taking seriously rather than dismissing. Zuk and colleagues' systematic review establishes that public investment can intensify displacement pressure on incumbent residents, while insisting that gentrification and displacement stay analytically distinct, which is exactly the discipline this paper has tried to keep, and it is why we read the post-2021 bend as a stretch worth watching rather than a proven effect of any single project ^[6]. The Institute for Housing Studies supplies the mechanism that connects a rent index to a human consequence, holding that displacement pressure builds where cost-burdened renters meet a shrinking low-cost supply in a market of climbing rents ^[9]. Those two works are why a 7.8 percent jump in a single year, or a median climb of nearly two-thirds across a decade, is not merely a market curiosity. They identify rising rents as one real ingredient of displacement pressure, even as they refuse to call rising rents displacement on their own.

Between those poles sits Hwang and Lin's review of the causal drivers of recent gentrification, which reinforces restraint from a third direction by cataloging how many forces, citywide and macroeconomic, can push rents up at once ^[4]. Their survey is a standing reminder that a neighborhood's rent can rise for reasons that have nothing to do with that neighborhood, so a South Side surge cannot be pinned on any local cause from data like ours ^[4]. The five works do not speak with one voice, and that is the point. One pair warns against overreading rising rents as displacement. Another pair explains why rising rents nonetheless matter for the people who rent. A fifth cautions against localizing the cause. The honest reading lives in the space all five define, taking the rent climb as real and consequential, declining to call it displacement, and declining to assign it a cause.

The Chicago-specific work explains why this geography behaves as it does. Hwang and Sampson found that the pace of gentrification in Chicago was negatively associated with Black and Latino concentration and attenuated sharply above roughly a 40 percent Black share, which helps explain why these majority-Black South Side ZIPs can show genuine rent pressure while following a different path than North Side tracts that gentrified fast and early ^[3]. Ding and Hwang's Philadelphia study points the same way on consequences, finding that gentrification's effects fall unevenly, with smaller financial gains for less-advantaged and Black residents, which supports reading these neighborhoods through an uneven-effects lens rather than a mass-displacement one ^[5]. The Voorhees Center's gentrification index supplies the long backdrop, showing that between 1970 and 2010 more Chicago community areas declined than gentrified, with the declines concentrated on the far South and West Sides, the very ground this panel covers, so that a decade of rising asking rents here reverses a long disinvestment trend rather than continuing one ^[8]. The Institute for Housing Studies ties the affordability mechanism to local conditions, holding that cost-burdened renters meeting a shrinking low-cost supply produce displacement pressure where rents climb, which is the framework our rent index and affordable-stock count jointly speak to without being able to complete ^[9].

It helps to be concrete about what "mounting affordability pressure" actually names, since the phrase can sound like a hedge. It is not a hedge. It is a specific, bounded claim about cost. The price of entering these rental markets rose substantially, a median of 64.6 percent across the 13 ZIPs and as much as 81.4 percent in Roseland, so a household trying to rent into these neighborhoods today faces a markedly higher cost than it would have a decade ago ^[1]. That rise was recent and steep rather than gradual, packed into the years after 2021, fast enough that incomes and subsidies in these neighborhoods are unlikely to have kept full pace with it ^[1]. And it landed hardest in several places, South Shore and Chatham among them, where the formal affordable-housing buffer is thinnest, so the neighborhoods facing the sharpest cost increase have among the fewest subsidized alternatives in the same ZIP ^[1]. Read as a description of cost and not of who moved, that is what mounting affordability pressure means here. It stops short of displacement. It is also considerably more than nothing.

Set the descriptive pattern and the literature side by side, and they converge on a single calibrated claim. The numbers show mounting affordability and displacement pressure, sharp, recent, and concentrated in historically Black neighborhoods that carry thin subsidized buffers. That pattern is consistent with the displacement the literature describes, and it is not proof of it. The scholarship agrees that rising rents and displacement are different things, that the second needs evidence the first cannot supply, and that majority-Black neighborhoods change on terms of their own. We hold to all three. What we have is a strong, reproducible signal of pressure on renters, read responsibly against the best available research, and stopping exactly where the data stop.

Back to Roseland, and what to watch

This paper opened on a single ZIP in Roseland, where the Zillow asking-rent index climbed from about $882 in mid-2016 to roughly $1,600 by March 2026, a rise of 81.4 percent and the steepest in the data ^[1]. Set back into the full panel, Roseland is less an outlier than the leading edge of something broad. Across all 13 South and Southwest Side ZIPs, asking rents rose between 41.0 and 81.4 percent from each ZIP's earliest reading, a median of 64.6 percent, and the climb accelerated after 2021 rather than drifting up across the decade ^[1]. One Roseland ZIP marks the high end of a real, decade-long, South-Side-wide rise.

The calibrated finding holds without reaching past it. Asking rents rose substantially and recently across all 13 ZIPs, fastest in historically Black neighborhoods such as Roseland, South Shore, and Chatham that carry relatively thin affordable buffers ^[1]. That is mounting affordability and displacement pressure. It is not measured displacement, because the index we used observes listings rather than the lives of households in place, and it carries no income data with which to judge rent burden ^[1][10]. We have tried to keep that line visible on every page, and we keep it here at the close.

The gap between what we can say and what we would need to say more is specific and bridgeable. Three measures would close most of it. Contract rents from tenants already in their units would show what people actually pay, not what landlords ask of newcomers, and would reveal how far the asking-rent climb has reached the renters who stayed. Income and rent-burden data, the share of household income going to housing, drawn from sources the Zillow index does not contain, would show whether these rising rents are eating a larger share of budgets in these ZIPs or whether incomes rose alongside them. And build-dated affordable-housing records, in place of the static snapshot we used, would show whether the low-cost supply in these ZIPs is shrinking, holding, or growing as the market moves, which is the single piece the displacement framework most needs and our data most lack. The published Chicago frameworks point at exactly those measures, the Institute for Housing Studies among them, which is part of why we trust the direction of the signal even as we refuse to overstate it ^[9].

A fuller account would also follow households rather than ZIPs. The deepest version of the displacement question is about people, who left, where they went, and whether they would have stayed but for the cost, and answering it takes the kind of longitudinal data on individual moves that a market-rate index can never supply. The studies we lean on most, Freeman and Braconi's mobility analysis and Freeman's succession work, are built on exactly that household-level evidence, which is why they can speak to displacement while we can speak only to pressure ^[2][7]. We name the difference not as an apology but as a map. The gap between a rent index and a displacement finding is real, and it is filled by specific, gatherable data, which is a more useful thing to say than either overclaiming what we have or dismissing it.

There is an asymmetry in the risk that is worth naming, because it bears on how much weight a careful reader should give a signal that stops short of proof. If the rent climb turns out to mark real displacement pressure and the city waits for airtight evidence before acting, the cost falls on renters who lose their footing in the meantime, in neighborhoods that have already absorbed decades of loss. If the climb turns out to be more benign than it looks, the cost of having watched it closely is small. An asking-rent index is a leading indicator by its nature, since it prices the market a household will face before that household has to face it, which makes it well suited to the role of early warning even though it is poorly suited to the role of proof. The responsible posture is not to wait for certainty that this particular instrument can never deliver. It is to treat a steep, broad, recent rise in the cost of renting into historically disinvested Black neighborhoods as reason enough to gather the contract-rent, income, and supply data that would settle the question, and to do so while the neighborhoods still hold the renters the question is about.

The civic stakes, then, read best in a measured register. Rents on the South Side, in neighborhoods long defined by disinvestment, are climbing fast enough to warrant close attention from the people and institutions that shape housing policy in Chicago. The responsible reading treats that climb as a question rather than a verdict, a question about affordability and stability for the households already living on these blocks, one that better data should be gathered to answer. The reproducible files behind every number here sit in the Rooted Forward data archive, where the analysis can be checked, corrected, and carried forward by anyone willing to do the work ^[1]. Roseland's decade of rising rents is a signal worth tracking, and tracking it honestly means saying plainly what we have seen and, just as plainly, what we have not.