ZIP 27511 presents a measured affordability tension: the matched survey reports that 51.8% of renter households are rent burdened at or above the 30% threshold, even though the current Zillow asking-rent index is $1,637 and the arithmetic income screen for that rent is $65,480 annually. That screen is below the ZCTA median household income of $107,860, but it is not advice, an applicant qualification rule, or evidence that any individual household can afford a particular home. It instead frames a contrast between a broad household-income benchmark and a substantial share of occupied renter households reporting elevated gross-rent burden.
The rent path is positive but has clearly slowed relative to its earlier pace. Through June 2026, the one-year exact same-month Zillow ZORI change was 0.99%, versus a three-year annualized change of 2.03% and a five-year annualized change of 5.06%. Recent direction therefore confirms the longer upward path but breaks from its stronger historical speed. Annualized monthly-return variability was 2.79%, which supports moderate confidence that one current index snapshot is not unusually erratic, while the maximum drawdown was a comparatively limited 1.69%. The history has complete supplied coverage across 103 observations and 102 consecutive return intervals. Transparent national discovery ranks among history-eligible ZIPs were 1,766 for momentum, 1,228 for stability, and 1,666 for the balanced measure, where lower rank is higher; these are backward-looking discovery measurements, not forecasts or investment recommendations.
Source definitions explain why the rent figures should not be treated as interchangeable. Zillow ZORI is a ZIP-level typical observed asking-rent index blended across rental types, while the ACS 2024 five-year median gross rent was $1,515 for occupied renter homes and includes selected utilities; the current asking index is 8.1% higher than that survey median. The matched Census ZCTA is a statistical area and is not identical to a USPS delivery ZIP. HUD's two-bedroom $1,620 FMR/SAFMR is instead an administrative bedroom-specific standard, not asking rent. For wider context only, Cary city context rent is $1,775.35, Wake County context rent is $1,676, and Raleigh-Cary, NC metro context rent is $1,689; each names a broader geography rather than a ZIP comparison sample.
The bedroom ladder is useful for sizing the ZIP index, but it does not supply measured bedroom rents. Scaling ZIP ZORI by the local HUD ladder produces modelled monthly estimates of $1,425 for a studio, $1,496 for one bedroom, $1,637 for two bedrooms, $2,051 for three bedrooms, and $2,749 for four bedrooms. These estimates preserve the local HUD bedroom relationships while anchoring their level to the ZIP asking-rent index. They should not be substituted for current listings, because actual unit rents can differ by building type, condition, included utilities, lease terms, availability, and other details not observed in this model.
The housing-stock evidence gives the burden result necessary context without proving availability at any specific property. The ZCTA reported 14,557 housing units, including 13,557 occupied units and 1,000 vacant units, for a 6.9% vacancy rate. Of the vacant stock, 479 units were identified as vacant for rent, which does not mean they were immediately rentable, comparable to a reader's needs, or offered at the Zillow index level. Renters represented 33.1% of occupied homes. The stock included 10,882 single-family units and 885 large multifamily units, indicating that the available survey structure mix is not solely apartment-oriented. The renter-occupied estimate carries a published margin of error of plus or minus 371 households at the 90% survey level, reinforcing that ACS shares are area estimates rather than precise counts for individual buildings.
Redfin supplies a separate, direct rolling-three-month ZIP resale observation, not rental transactions or rental comps. Its median sold price was $541,878, up 1.76% year over year, with 153 homes sold and median marketing time of 11 days. Redfin also recorded 246 active listings, inventory of 97 homes, and 1.9 months of supply. Sale-to-list evidence was close to parity at 99.69%, while 42.32% of homes sold above list and 57.71% went off market within two weeks. These are for-sale liquidity and pricing signals, not evidence about tenant demand, lease pricing, or the economics of a particular rental property. Annualized ZIP ZORI divided by Redfin's median sold price equals a 3.63% cross-source screening ratio only; it is not a property-level income or return measure.
The resale and rental readings create a useful tension rather than a single strength signal. Short marketing time, limited months of supply, and a positive sold-price change show comparatively active ZIP resale conditions in Redfin's rolling observation. Yet the asking-rent index has only a modest one-year increase after faster longer-run gains, and the ACS burden share remains elevated. Thus, resale liquidity confirms that the for-sale market was active while challenging any assumption that its conditions translate directly into accelerating rental affordability or rent growth. The higher months-of-supply figure in the Raleigh-Cary, NC metro context is only a metro comparison, not evidence that ZIP 27511 will move in the same direction. None of these backward-looking measures establish future price, rent, vacancy, or household outcomes.
Decision use depends on preserving those limits. Zillow's index is not a quoted unit rent, ACS is a multi-year survey of occupied homes, HUD is an administrative standard, and Redfin describes completed ZIP resale activity. Property-level review should verify the advertised rent, bedroom count, included utilities, lease duration, concessions, available date, building type, and condition before comparing a listing with the modelled ladder. A resale-oriented review should separately confirm the specific address, sale date, listing history, property condition, and whether the home is comparable to the ZIP observation. The central unresolved question is whether a particular unit's actual terms align with the broad ZIP rent snapshot while remaining distinct from the survey burden and resale evidence.
","findings":[{"body":"The matched ACS ZCTA reports a 51.8% share of renter households spending at least 30% of income on gross rent, despite a $1,637 Zillow ZIP asking-rent index and a $65,480 arithmetic income screen. This does not identify affordability for a particular applicant, but it makes the difference between median-income arithmetic and reported renter burden decision-relevant.","title":"Burden is the clearest rent-side tension"},{"body":"The one-year Zillow rent change was 0.99%, below the three-year annualized 2.03% pace and the five-year annualized 5.06% pace. Positive recent movement supports continuity in direction, while slower growth breaks from the earlier speed. Low historical drawdown and modest variability improve context for the current snapshot without making it predictive.","title":"Rent growth remains positive, but momentum has moderated"},{"body":"The studio-through-four-bedroom estimates scale the ZIP-wide Zillow ZORI using the local HUD bedroom ladder. They offer a consistent sizing framework, but do not measure current rents for separate bedroom categories. Listing-level rent can differ materially because the index, HUD standard, and actual property terms capture different evidence universes.","title":"Bedroom figures are modelled, not observed listing rents"},{"body":"Redfin's direct ZIP resale data show short marketing time, limited supply, and a positive sold-price change, which indicates active for-sale conditions during its rolling observation window. That evidence is separate from rents. It sits alongside slowing recent asking-rent growth and a high ACS burden share, so it cannot be used to infer tenant outcomes or property-specific rental economics.","title":"Resale activity does not resolve rental affordability"}],"risks":["A ZIP-level asking-rent index blends rental types and does not describe a specific available home, lease term, included utilities, concession, condition, or the rent ultimately accepted by any household.","ACS gross-rent and burden measures are five-year survey estimates for occupied renter homes, with margins of error, and cannot establish current vacancy, affordability, or payment experience for a particular unit.","The HUD-derived bedroom ladder creates modelled estimates rather than measured bedroom rents; actual pricing may vary substantially by building type, bedroom configuration, utility treatment, availability, and lease details.","Redfin resale figures describe completed for-sale activity in a rolling three-month ZIP observation. Median sold price and the rent-price screening ratio should not be interpreted as rental transactions, property income, or future outcomes."],"qa":[{"a":"They describe different populations and measurement methods. Zillow ZORI is a typical observed asking-rent index at the ZIP level and blends rental types. ACS median gross rent is a five-year survey estimate for occupied renter homes and includes selected utilities. The matched ZCTA is statistical geography, not the same thing as a USPS delivery ZIP.","q":"Why does the Zillow asking-rent index differ from ACS median gross rent?"},{"a":"No. The studio, one-bedroom, two-bedroom, three-bedroom, and four-bedroom figures are modelled estimates. They scale the ZIP-wide Zillow asking-rent index using local HUD bedroom-standard relationships. They are useful for consistent comparison, but a specific listing requires verification of its actual rent, bedroom count, utilities, condition, lease term, and availability.","q":"Are the bedroom rent estimates direct measurements of available units?"},{"a":"It is arithmetic: annualizing the current Zillow asking-rent index and dividing by 30% produces an income benchmark. It is not advice, an underwriting standard, an applicant qualification rule, or a conclusion about whether any household can afford a home. Reported ACS rent burden is a separate survey-based measure of occupied renter households.","q":"What does the 30% required-income screen mean?"},{"a":"Use it only as direct ZIP for-sale context. Redfin's median sold price, days on market, supply, inventory, and sale-to-list measures describe resale liquidity and pricing behavior, not rental transactions. The annualized ZORI-to-price figure is merely a cross-source screening ratio and cannot establish a specific property's income, expense profile, or return.","q":"How should the Redfin resale evidence be used with the rent 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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