At ZIP 80017, Zillow’s typical observed asking-rent index, blended across rental types, was $1,579 at the stated June endpoint. Its recent path is the central tension: the exact same-month change was -3.17% over one year and -1.67% annualized over three years, yet +2.34% annualized over five years. Recent cooling therefore breaks from the longer positive path rather than confirming it. History coverage is 100%, supporting a complete backward-looking record. Annualized variability in monthly ZORI returns was 2.79%, which suggests that a single current index reading has some month-to-month movement around it. Separately, the maximum observed drawdown was 8.57%, showing that the historical decline was materially deeper than the current one-year rate alone conveys. Transparent national discovery ranks among history-eligible ZIPs were 2,862 for momentum, 1,240 for stability, and 2,584 for the balanced measure, where lower rank is higher. These are measurements of past rent behavior, not forecasts or investment recommendations.
The direct rolling-three-month Redfin ZIP resale observation points to a different, comparatively steady for-sale picture. Median sold price was $424,904, essentially unchanged year over year at -0.02%, while 105 homes sold and median marketing time was 22 days. Inventory was 140 homes with 4.0 months of supply. Sellers received an average 99.82% of list price, 33.36% of sales closed above list, and these are resale signals only, not rental transactions or rental comps. The annualized ZIP ZORI divided by median sold price produces a 4.46% cross-source screening ratio only; it is not a cap rate, net return, expected return, or property yield. This stable resale pricing and active sales pace challenge any simple reading that falling asking rents necessarily coincide with weakening resale values. Conversely, the cooling rent history cautions against treating resale-market steadiness as confirmation of current rent growth.
The bedroom figures are modelled monthly estimates, not measured bedroom rents. They scale the ZIP ZORI using the local HUD ladder: $1,242 for a studio, $1,326 for one bedroom, $1,579 for two bedrooms, $2,067 for three bedrooms, and $2,305 for four bedrooms. The two-bedroom model result equals the ZIP-level index because it is the scaling anchor. HUD FMR/SAFMR is an administrative, bedroom-specific standard rather than asking rent, so the ladder supplies relative bedroom structure rather than evidence of achieved lease prices. A listing’s actual bedroom count, utilities, condition, concessions, lease term, and included services can all make its asking rent differ from these modelled estimates.
The ACS comparison answers a different question from Zillow. In the matched Census ZCTA’s ACS 2024 five-year survey, median gross rent was $1,871; this is a survey measure for occupied renter homes and includes selected utilities, while Zillow measures a typical asking-rent index. The current asking-rent index is therefore 84.39% of that gross-rent benchmark, a difference that should not be read as a direct lease-price discount without accounting for source design. The five-digit label is both the Zillow ZIP market identifier and the Census ZCTA match, but a ZCTA is a statistical area and is not identical to a USPS delivery ZIP. Applying a 30% rent-to-income screen arithmetically to the Zillow index produces required annual income of $63,160. That screen is not advice and not an applicant qualification rule. The ZCTA median household income was $80,524, placing the index at 23.53% of that median income. Yet 57.80% of surveyed renter households were rent-burdened at 30% or more, showing that household-level rent pressure remains important context rather than proof about any particular unit.
The matched ZCTA contained 14,921 housing units, including 759 vacant units, for a 5.09% vacancy rate. Renters represented 41.00% of occupied homes. The housing stock is weighted toward single-family structures, with a smaller large-multifamily component, so an area-wide rent index may blend properties with materially different physical forms and leasing terms. Units vacant for rent are an aggregate inventory category, not evidence that any given available home is comparable, overpriced, discounted, or likely to remain vacant. Likewise, the burden statistic reflects surveyed occupied renter households, not the payment capacity or lease outcome of a particular prospective resident. The stock and vacancy figures establish market-wide composition and availability context only.
Wider-area comparisons put the ZIP’s lower asking-rent index in perspective without replacing ZIP evidence. Aurora city context had a rent index of $1,759, Arapahoe County context had $1,821, and the Denver-Aurora-Lakewood, CO metro context had $1,930; each is a wider-scope benchmark rather than a ZIP rental comp. The ZIP renter share is higher than the city and county context shares, while its vacancy rate is also above each of those wider-area rates. Its surveyed burden share is below Aurora city context but above the county context rate, another indication that broad affordability measures do not move in a single direction. Metro apartment vacancy and apartment marketing-time figures remain metro-wide context and cannot establish conditions for an individual ZIP property or lease.
Read together, the evidence presents a cross-market tension rather than a uniform signal. Zillow’s asking-rent history has cooled recently after a positive five-year path, and the household burden measure indicates that rent pressure persists for many occupied renters. Meanwhile, the direct ZIP resale observation shows nearly flat sold prices, meaningful sales activity, short marketing time, and sale-to-list outcomes close to parity. The resale evidence confirms that the for-sale market was not showing the same visible price retreat as the rent index, but it cannot validate a rental asking price because it tracks sold homes rather than leases. The history variability and drawdown also mean the current ZORI is most useful as a broad snapshot with moderate historical movement, not as a fixed rent conclusion.
Important limits remain. Zillow ZORI does not identify a specific property, ACS gross rent is not a current asking-rent feed, HUD standards are not market leases, and Redfin resale data are not rental economics. Concrete property-level checks needed to interpret this ZIP evidence include the advertised rent and effective rent after concessions, exact bedroom count, utility responsibilities, square footage, property type, condition, availability date, lease duration, comparable active listings, and completed lease terms where available. For a resale-linked review, the sold-home characteristics, list-price history, financing terms, and renovation status also matter because the ZIP median sold price combines unlike transactions. Those checks determine whether the broad cooling-versus-steady-resale tension applies to the individual property being evaluated.
","findings":[{"body":"The ZIP asking-rent index declined over the latest one-year and three-year comparisons, while its five-year annualized change remained positive. Complete historical coverage supports the measurement, but the monthly-return variability and maximum drawdown show that the index has not moved in a straight line. The current reading is best treated as a backward-looking market snapshot, not a forecast.","title":"Rent history has cooled despite a positive longer path"},{"body":"Direct rolling-three-month ZIP resale data show a nearly unchanged median sold price, substantial closed-sale activity, short marketing time, and near-list sale outcomes. Those observations describe for-sale transactions, not rental leases. They challenge a simple assumption that recent rent cooling automatically signals declining home resale prices, while also providing no evidence that rental asking rents will rise.","title":"Resale conditions do not mirror the rent slowdown"},{"body":"Studio through four-bedroom figures are derived by scaling the ZIP-level Zillow asking-rent index with the local HUD bedroom ladder. They provide a consistent estimate structure across bedroom counts, but are not observed rents for those unit types. HUD FMR/SAFMR is an administrative standard, and actual lease pricing can differ because of utilities, concessions, condition, lease terms, and property characteristics.","title":"Bedroom rents are a modelled ladder, not lease evidence"},{"body":"The arithmetic income screen based on Zillow asking rent sits below the matched ZCTA median household income, but the ACS survey reports a substantial share of occupied renter households paying at least 30% of income toward rent. Zillow asks, ACS occupied gross rents, and household burden are separate evidence universes. None establishes affordability, qualification, or likely payment performance for a specific household or unit.","title":"Affordability screens and renter burden describe different populations"}],"risks":["The Zillow asking-rent index blends rental types and does not identify unit size, condition, utility treatment, concessions, lease duration, or effective rent, limiting direct use for a particular listing.","Recent rent declines break from the longer five-year history, and prior drawdown plus monthly variability mean a single current index point may understate the range of past market movement.","Redfin metrics are direct ZIP resale observations, but sold-home prices, sale-to-list outcomes, and marketing time cannot be converted into rental transaction evidence or property-level operating economics.","ACS ZCTA results are five-year survey estimates for occupied homes, while a ZCTA is statistical geography rather than a USPS delivery ZIP; margins, timing, and universe differences require caution."],"qa":[{"a":"They measure different universes. Zillow ZORI is a typical observed asking-rent index blended across rental types, while ACS median gross rent is a five-year survey measure for occupied renter homes and includes selected utilities. The ACS result is also reported for the matched ZCTA, which is a statistical area rather than an identical USPS delivery ZIP.","q":"Why does the Zillow asking-rent index differ from ACS median gross rent?"},{"a":"No. The bedroom figures are modelled monthly estimates created by scaling the ZIP ZORI with the local HUD bedroom ladder. HUD FMR/SAFMR is an administrative bedroom-specific standard, not asking rent. A specific unit’s rent can differ because of property type, condition, utilities, concessions, availability, and lease structure.","q":"Are the bedroom estimates observed rents for studios through four-bedroom homes?"},{"a":"The required-income figure is a mechanical calculation that applies a 30% rent-to-income threshold to the current Zillow asking-rent index. It is not advice, an underwriting result, a tenant qualification rule, or a measure of any household’s actual finances. The ACS burden share separately describes surveyed occupied renter households, not prospective renters.","q":"What does the income screen indicate?"},{"a":"Redfin’s rolling-three-month ZIP figures describe the for-sale market through sold prices, sales volume, marketing time, inventory, supply, and sale-to-list outcomes. They are not rental transactions. The annualized rent-to-price figure is only a cross-source screening ratio, so it cannot establish a cap rate, net return, expected return, or property-level yield.","q":"How should the resale data be read alongside the rental data?"}],"sources":[{"key":"apartment_list_time_on_market","name":"Apartment List Time on Market — listing liquidity","release":"Apartment List 2026-07","pulledAt":"2026-08-08","url":"https://www.apartmentlist.com/research/category/data-rent-estimates"},{"key":"apartment_list_vacancy","name":"Apartment List Vacancy Index — rental vacancy","release":"Apartment List 2026-07","pulledAt":"2026-08-08","url":"https://www.apartmentlist.com/research/apartment-list-vacancy-index-methodology"},{"key":"census_zcta_facts","name":"Census ACS five-year — ZCTA housing and income","release":"ACS 2024 5-year ZCTA","pulledAt":"2026-08-08","url":"https://api.census.gov/data/2024/acs/acs5.html"},{"key":"hud_zip","name":"HUD USPS crosswalk and Small Area FMRs — ZIP rent 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