The central tension in 85013 is that asking rent has edged upward while direct resale evidence looks comparatively measured. ZIP 85013 is both a Zillow ZIP market identifier and a match to a Census ZCTA; a ZCTA is a statistical area and is not identical to a USPS delivery ZIP. The current Zillow ZORI is $1,516, up 1.9% from a year earlier. Zillow ZORI is a typical observed asking-rent index blended across rental types. For wider context, Phoenix city rent is $1,569, Maricopa County rent is $1,729, and Phoenix-Mesa-Chandler metro rent is $1,733; these are broader-geography context values rather than ZIP substitutes.
Source differences matter before comparing those figures. The matched ACS five-year survey reports a $1,585 median gross rent for occupied renter homes, a measure that includes selected utilities and is not an asking-rent index. The ZIP ZORI therefore sits modestly below that survey median, but the two measures describe different rental universes and should not be read as competing quotes for the same unit. HUD’s FY2026 two-bedroom standard is $1,990. HUD FMR or SAFMR is an administrative, bedroom-specific standard rather than asking rent, so it is useful as a benchmark ladder but not as evidence that local advertised two-bedroom units rent at that amount.
Bedroom figures are modelled estimates, not measured bedroom rents. They scale the ZIP-wide ZORI by the local HUD bedroom ladder, producing estimates of $1,204 for a studio, $1,303 for a one-bedroom, $1,516 for a two-bedroom, $2,019 for a three-bedroom, and $2,240 for a four-bedroom. This structure makes the estimated jump from two to three bedrooms materially larger than the move across smaller sizes. It does not identify the rent of any particular dwelling, because property condition, lease terms, included utilities, building type, and the actual advertised bedroom count are outside this model.
The affordability screen is also a calculation rather than an applicant rule. At the 30% rent-to-income screen, annual income required to cover the current ZIP ZORI is $60,640. That is below the ZCTA’s ACS median household income of $71,966, and the direct asking-rent-to-income arithmetic is 25.3%. Yet ACS reports 3,343 renter households spending at least 30% of income on rent out of 6,654 renter households, a 50.2% burden share. The apparent tension reflects differing households and measures: gross-rent burden includes the survey framework and selected utilities, while the screen uses Zillow asking rent. Neither metric establishes affordability for a specific household or qualification for a particular unit.
The ZCTA’s housing base is renter-oriented, but vacancy evidence needs restrained interpretation. Of 12,178 housing units, 5,801 are single-family units and 3,623 are in large multifamily structures. The reported vacancy rate is 8.5%, while renters occupy 59.7% of occupied homes. ACS also classifies 291 units as vacant for rent. These stock and vacancy measures describe area-level survey categories, not live availability, lease concessions, unit condition, or the likely turnover of a particular property. They nevertheless provide useful context for why a ZIP-wide asking-rent snapshot should be paired with current listings rather than treated as a complete inventory reading.
History shows a mixed, backward-looking path rather than a straight acceleration. Exact same-month annualized ZORI change was 1.9% over one year, 0.5% over three years, and 3.1% over five years. The recent increase therefore improves on the subdued three-year path but remains slower than the longer five-year pace. Monthly rent changes imply 3.4% annualized variability, which supports somewhat more confidence in the current index than a highly erratic series would, though not certainty about any one listing. Separately, the maximum historical drawdown was 4.6%, showing that the index has retreated before. Historical coverage was 98.5%. Transparent national discovery ranks were 1,843 for momentum, 2,119 for stability, and 2,313 for the balanced measure, where a lower rank is higher. These are historical discovery measurements, not forecasts or investment recommendations.
Direct ZIP resale data sharpen the contrast. In the rolling-three-month 85013 for-sale observation, median sold price was $542,377, up 0.16% year over year; 66 homes sold, median marketing time was 59 days, inventory was 99 homes, and months of supply stood at 4.6. Average sale-to-list was 98.1%, with 14.1% of sales above list price. These are resale-market observations, not rental transactions or rental comparables. Annualized ZIP ZORI divided by median sold price produces a 3.35% cross-source screening ratio only; it is not a cap rate, net return, expected return, or property yield. The resale picture challenges a simple rent-strength reading: asking rents rose, but slow price movement and below-list average sales point to a less urgent for-sale signal.
Several limits remain material. Zillow measures a blended asking-rent index; ACS is a ZCTA survey with margins of error; HUD standards serve administrative purposes; and Redfin describes ZIP resale activity over a rolling period. A property-level review would need the live asking rent, available date, lease duration, utility responsibility, actual bedroom count, square footage, building type, condition, concessions, and comparable active listings. For a purchase-resale comparison, it would also need the specific property’s list history, sale terms, renovation status, taxes, insurance, financing assumptions, and repair needs. The evidence supports a disciplined reading of the gap between a modestly rising rent index and a comparatively restrained resale market, not a conclusion about any individual unit.
","findings":[{"body":"The current ZIP Zillow ZORI increased from a year earlier, yet it remains below the reported Phoenix city, Maricopa County, and Phoenix-Mesa-Chandler metro rent context values. That comparison is directional only because each broader geography includes housing and renter mixes beyond 85013. The ZIP index is a blended asking-rent measure, not a direct inventory count.","title":"Rent index is rising, but remains below wider rental context"},{"body":"The bedroom series is created by scaling the ZIP-wide Zillow ZORI through the local HUD ladder. It is useful for comparing the relative modeled cost of different bedroom sizes, particularly the larger step into three-bedroom housing. It cannot substitute for unit-specific rental evidence because actual listings can differ by building type, condition, utility treatment, concessions, and lease terms.","title":"Bedroom ladder is a model, not a set of observed rents"},{"body":"The arithmetic income screen based on ZIP asking rent falls below the ZCTA median household income, while roughly half of surveyed renter households report gross-rent burdens at or above the threshold. These results are not inconsistent once scope is considered: ACS measures occupied renter households and gross rent including selected utilities, whereas Zillow measures typical observed asking rents.","title":"Area burden data complicate the median-income screen"},{"body":"ZIP rent history recently improved relative to its three-year pace, but the direct resale observation shows little annual price change, marketing time approaching two months, and average sales below list price. The resulting rent-price calculation is solely a cross-source screen. It should not be translated into property economics, a yield estimate, or an expected return.","title":"Resale conditions temper the rent-history signal"}],"risks":["The ZCTA and USPS delivery ZIP do not have identical boundaries, so ACS household, rent, burden, vacancy, and housing-stock estimates may not map perfectly to the ZIP geography used by Zillow and Redfin.","Zillow ZORI is a blended asking-rent index across rental types, meaning it may differ from currently available units with unusual condition, utilities, concessions, bedroom counts, lease terms, or building characteristics.","ACS gross-rent and burden results are five-year survey estimates for occupied renter homes with margins of error, so they cannot prove the affordability or vacancy status of a particular available unit.","Redfin resale indicators concern completed for-sale transactions and active resale inventory, not rental transactions; the rent-to-price calculation omits operating costs, financing, taxes, insurance, repairs, and property-specific quality."],"qa":[{"a":"They measure different populations and rent concepts. Zillow ZORI is a ZIP-level typical observed asking-rent index blended across rental types. ACS median gross rent is a five-year survey statistic for occupied renter homes and includes selected utilities. Timing, geography, household occupancy, utility treatment, and the distinction between asking and paid rent can all create a difference.","q":"Why does the ACS median gross rent differ from the Zillow rent index?"},{"a":"No. They are modelled bedroom estimates derived by scaling the ZIP-wide Zillow ZORI through the applicable local HUD bedroom ladder. The figures describe a consistent modeled relationship among bedroom sizes, not measured rents from a sample of studio, one-bedroom, two-bedroom, three-bedroom, or four-bedroom listings in the ZIP.","q":"Are the bedroom rent figures actual observed rents in 85013?"},{"a":"It is arithmetic: annualized ZIP asking rent divided by a 30% income share. It is not rental advice, an underwriting conclusion, an applicant qualification rule, or evidence that a household can afford a specific unit. Actual household budgets may differ because of utilities, debt, dependents, savings goals, lease obligations, and other expenses not included here.","q":"What does the 30% required-income figure mean?"},{"a":"Use them as a separate view of the direct ZIP for-sale market. Median sold price, marketing time, inventory, supply, and sale-to-list measures describe resale liquidity and pricing behavior, not rental transactions. Dividing annualized ZORI by sold price creates only a cross-source screening ratio and cannot represent net income, cap rate, expected return, or property yield.","q":"How should the resale figures be used alongside 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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