The strongest measured tension is that current asks sit substantially above the ZCTA's backward-looking renter-cost benchmark. At the stated Zillow endpoint, ZIP 10023 has a typical observed asking-rent index of $5,133 per month, up 7.57% from the same month a year earlier. Zillow ZORI is a ZIP-level asking-rent index blended across rental types, rather than a measure of every active listing or an executed lease. The matched ACS median gross rent is $3,239, making the asking index 1.58 times that survey median. Applying the arithmetic 30% screen to the ZORI produces required annual income of $205,320, versus ZCTA median household income of $159,874; the index therefore equals 38.5% of that median income. This is a comparison screen, not advice, an applicant-qualification rule, or evidence of any household's actual budget.
History supports an upward longer-run asking-rent path, but it also argues against treating one current reading as mechanically certain. The one-year exact same-month annualized change was 7.57%, the three-year measure was 5.89%, and the five-year measure was 8.76%. Recent direction therefore confirms rising asking rents, although its pace is below the five-year path and above the three-year path. Monthly changes generated 3.19% annualized variability, placing this series in the supplied high-variability category and reducing confidence in any single rent snapshot. Separately, the historical peak-to-trough maximum drawdown reached 16.82%, showing that the observed index has experienced meaningful reversals. History coverage is complete, with 138 observations and 137 consecutive monthly returns. Transparent national discovery ranks were 88 for momentum, 1,906 for stability, and 437 for the balanced measure among history-eligible ZIPs; these are backward-looking ranks, not forecasts or investment signals.
The bedroom figures should be read as modelled estimates rather than measured bedroom rents. Scaling the ZIP ZORI through the local HUD bedroom ladder produces estimates of $3,723 for a studio, $4,319 for one bedroom, $5,133 for two bedrooms, $6,288 for three bedrooms, and $7,245 for four bedrooms. HUD's FY2026 FMR/SAFMR ladder is an administrative bedroom-specific standard, not asking rent; its local two-bedroom standard is $2,616. The modelled two-bedroom estimate is consequently 196.2% of that HUD standard. This structure preserves the ZIP's observed all-rental-type ZORI level while using local HUD relationships to differentiate bedrooms, but it does not establish the advertised rent, condition, utilities, concessions, or availability of a particular apartment.
The ACS 2024 five-year matched ZCTA survey explains why its rent comparison has a different meaning. ACS median gross rent is a survey measure for occupied renter homes and includes selected utilities, whereas ZORI tracks asking rents. The housing stock is predominantly large multifamily: 38,245 of 46,860 housing units fall in that category. There are 9,152 vacant units, a 19.5% vacancy rate, but 5,728 are seasonal vacancies and 1,899 are vacant for rent. Among 23,354 renter-occupied homes, representing 61.9% of occupied housing, 9,538 renter households, or 40.8%, reported spending at least 30% of income on rent. Those burden and vacancy figures describe the survey population and vacancy categories; neither proves affordability, vacancy, or rent terms for a specific unit.
Wider geographies provide context but cannot substitute for ZIP evidence. For city context, New York has a context rent of $4,133; for county context, New York County has a context rent of $4,833; and for metro context, New York-Newark-Jersey City has a context rent of $3,573. The direct ZIP asking-rent index sits above each of those broader figures, with the nearest comparison being the county context. These city, county, and metro values are context only and cover broader geographic scopes than the ZIP. Their presence does not make them rental comparables for 10023, nor does it resolve the difference between current asking rents and the ACS survey of occupied renter households.
Redfin supplies a separate, direct rolling-three-month ZIP resale observation, not rental transactions. In that for-sale universe, the median sold price was $1,324,701, down 8.03% year over year. Redfin recorded 176 homes sold, a median 62 days on market, and 305 homes of inventory. Months of supply stood at 5.3. Average sale-to-list was 99.76%, while 22.83% of sold homes went above list price. These measurements describe resale liquidity, pricing, marketing time, inventory, and sale-to-list behavior within the ZIP's for-sale market. They do not measure apartment asks, lease concessions, tenant demand, operating costs, or the economics of a rental property.
Annualizing the ZIP ZORI and dividing it by Redfin's median sold price produces a 4.65% cross-source screening ratio. It is only a screening ratio: it is not a cap rate, net return, expected return, property yield, or a substitute for property financials. The key tension is that same-month asking-rent history remains positive while the direct ZIP resale median sold price declined. That challenges any simple reading of rent growth as uniform strength across all housing evidence. Conversely, sale-to-list results near parity show that the resale observation is not reducible to the price-change figure alone. The affordability screen also remains separate because it compares ZIP asking rent with ZCTA household income, not sale prices or a prospective buyer's financing.
The five-digit label is both Zillow's ZIP market identifier and a Census ZCTA match, but a ZCTA is a statistical area and is not identical to a USPS delivery ZIP. Source timing and populations matter: Zillow observes asking-rent conditions, ACS surveys occupied homes over five years, HUD sets administrative bedroom standards, and Redfin observes a rolling resale window. Property-level checks therefore remain necessary to connect these aggregates to any address: advertised rent, bedroom count, included utilities, concessions, lease term, current availability, occupancy status, building condition, and whether a cited sale is genuinely comparable. The unresolved question is whether the terms of an identified unit resemble the modelled ZIP pattern rather than merely sharing its geographic label.
","findings":[{"body":"The ZIP's current Zillow asking-rent index is materially above matched ACS median gross rent. That gap is informative but not directly interchangeable because ZORI reflects observed asking rents across rental types, while ACS describes occupied renter homes and includes selected utilities. The 30% required-income result is a transparent arithmetic comparison against ZCTA median household income, not a household affordability finding.","title":"Asking rents exceed the survey cost benchmark"},{"body":"The one-year, three-year, and five-year history measures are all positive, indicating a backward-looking upward asking-rent path. However, the recent pace differs from both longer windows, and the supplied variability classification, monthly variability measure, and maximum drawdown show that this path has not been smooth. Complete history coverage strengthens measurement completeness, not forecast certainty.","title":"Rent growth has persisted with meaningful path risk"},{"body":"Large multifamily buildings account for most housing units in the matched ZCTA, while renters represent most occupied households. The vacancy rate includes a substantial seasonal component as well as units vacant for rent. ACS burden data show that many surveyed renter households devote at least 30% of income to rent, but the survey cannot identify the availability, utility terms, or financial circumstances attached to a particular apartment.","title":"Multifamily stock and survey vacancy require careful interpretation"},{"body":"Redfin's direct ZIP resale observation showed a year-over-year median sold-price decline even as Zillow's same-month asking-rent index increased. Resale activity, days on market, supply, and sale-to-list metrics remain for-sale evidence only. The annualized-rent-to-sale-price figure can support cross-source screening, but it does not include expenses, financing, taxes, vacancies, or property-specific lease revenue and therefore is not a return metric.","title":"Resale softness complicates the rental signal"}],"risks":["ZORI's blended asking-rent construction and ACS gross rent's occupied-home, utility-inclusive survey design describe different populations and periods, so their gap cannot establish the rent, utility exposure, or affordability of an individual available home.","Complete historical coverage does not eliminate snapshot risk: documented monthly variability and the historical drawdown show that an observed index path can shift materially without furnishing a forecast or an investment conclusion.","Vacancy totals include seasonal units and other classifications beyond homes currently offered for rent, so the aggregate vacancy rate cannot prove immediate availability, negotiating leverage, or lease concessions at a particular building.","Redfin resale measurements and the rent-price screening ratio omit property expenses, financing, taxes, condition, and lease terms; combining them without those checks can overstate what ZIP-level evidence says about a specific property."],"qa":[{"a":"The 10023 label is used here as Zillow's ZIP market identifier and as the match for a Census ZCTA. A ZCTA is a statistical area built for Census tabulation and is not identical to a USPS delivery ZIP. This distinction matters because data sources can use overlapping but not identical geographic constructions.","q":"What does the 10023 geography label represent?"},{"a":"The measures cover 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 estimate for occupied renter homes that includes selected utilities. The difference can identify a market-level gap between current asks and surveyed occupied-home costs, but it cannot identify the rent of a specific unit.","q":"Why is the asking-rent index higher than ACS median gross rent?"},{"a":"No. The studio through four-bedroom figures are modelled ZIP estimates created by scaling the observed ZIP ZORI with the local HUD bedroom ladder. HUD FMR/SAFMR values are administrative bedroom-specific standards, not asking rents. The resulting estimates are useful for structured comparison but do not measure advertised rents, concessions, utilities, or apartment quality.","q":"Are the bedroom rent figures observed rents for listed apartments?"},{"a":"It divides annualized ZIP ZORI by Redfin's direct ZIP median sold price from a rolling-three-month resale observation. That makes it a cross-source screening ratio only. It is not a cap rate, property yield, net return, expected return, or valuation conclusion because it excludes operating expenses, vacancy, financing, taxes, property condition, and lease-specific revenue.","q":"What does the Redfin screening ratio indicate?"}],"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 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