At June 2026, the $2,285 Zillow ZORI for ZIP 22204 is the focal current signal. ZORI is a typical observed asking-rent index blended across rental types, not a count or quote of every active listing. In wider-area context, the Arlington city scope context rent is $2,722.44, the Arlington County scope context rent is $2,722, and the Washington-Arlington-Alexandria, DC-VA-MD-WV metro scope context rent is $2,448. The ZIP index is lower than all three contextual values, creating a local-versus-broader tension, but city, county, and metro values are context only and cannot substitute for the ZIP measurement. This comparison describes levels at their respective scopes, not comparable property mix or a reason for the gap.
That lower level arrives during cooling rather than a uniformly falling record. Exact same-month Zillow history at the stated endpoint shows a -0.35% one-year change, versus annualized gains of 1.84% over three years and 4.05% over five years. Recent direction therefore breaks from, rather than confirms, the longer positive path. Annualized variability of monthly returns was 1.96%, maximum drawdown reached -4.50%, and coverage was 100% for the available history. Transparent national discovery ranks among history-eligible ZIPs were 2,177 for momentum, 114 for stability, and 1,233 for the balanced measure, with lower ranks higher. These are backward-looking measurements: the relatively stable history supports more confidence in the index as a summary, while the latest decline means one snapshot is not a forecast, investment signal, or evidence about an individual asking price.
The same label has deliberately different measurement universes. The five-digit label 22204 is both a Zillow ZIP market identifier and a Census ZCTA match; a ZCTA is a statistical area and is not identical to a USPS delivery ZIP. In the ACS 2024 five-year survey, median gross rent is $1,894 for occupied renter homes and includes selected utilities. It is a survey median, not today’s asking-rent index, so the gap from ZORI should not be treated as a listing-level premium. FY2026 HUD FMR/SAFMR supplies a $2,210 two-bedroom administrative standard. HUD standards are bedroom-specific program benchmarks, not asking rent; they provide scaling and context without showing what any home was marketed for.
Bedroom detail is useful only when its construction remains visible. The modelled monthly ZIP estimates are $1,985 for a studio, $2,047 for one bedroom, $2,285 for two bedrooms, $2,885 for three bedrooms, and $3,391 for four bedrooms. These estimates scale ZIP ZORI using the local HUD ladder, with the ZIP index serving as its middle-rung anchor. They are modelled estimates, never measured bedroom rents: the ladder preserves relative HUD size differences but does not observe unit features, lease terms, or a separate supply-and-demand price for each bedroom group. A studio or four-bedroom listing can therefore differ materially from its displayed modelled reference.
Affordability evidence carries a different limitation. The $91,400 required annual income is arithmetic from annualizing the current ZIP index and applying a 30% rent-to-income screen; it is not advice or an applicant qualification rule. ACS median household income is $107,941, with a reported margin of error of $5,845. That aggregate median is above the screen, but it cannot identify a household’s actual income, rent, utility costs, or eligibility terms. Separately, ACS estimates that 5,540 of 13,472 renter-occupied households were in the reported 30%-or-more rent-burden category, a 41.12% share. This is an aggregate survey burden measure, not proof that any particular unit or renter faces that condition.
Stock capacity adds context without establishing current availability. The matched ACS ZCTA inventory contains 24,089 housing units and has a 6.41% vacancy rate. Renter-occupied homes outnumber owner-occupied homes, and large multifamily units slightly outnumber single-family units in the recorded structure mix. Those patterns describe surveyed stock and occupancy rather than market liquidity. Total vacancy covers multiple non-occupancy statuses, rather than a count of rentals currently advertised, priced at ZORI, or ready for immediate move-in. The vacancy measure therefore does not prove availability, condition, lease terms, or price for an individual property.
Taken together, the packet supports a careful reading: a ZIP-level asking-rent index below broader context, a recent cooling move after longer gains, and separate survey, administrative, and stock measures that answer different questions. It cannot authenticate a listing’s base rent, included utilities, mandatory fees, concessions, bedroom classification, availability date, lease duration, or income standard. Concrete property-level checks remaining outside the packet are the advertised rent terms, documented unit configuration, included and excluded costs, dated availability, and applicable lease conditions. Which of those documented terms, if any, makes a specific offering diverge from the ZIP-level reference?
","findings":[{"body":"Same-month Zillow history shows a 0.35% one-year decline even though the three-year and five-year annualized paths were positive. The 1.96% annualized volatility and 4.50% maximum drawdown describe a historically stable index series, not a promise that the cooling phase will persist or reverse. Recent direction is a break from the longer path.","title":"Cooling interrupts a longer gain path"},{"body":"At $2,285, ZIP 22204 ZORI is below the $2,722.44 Arlington city context, the $2,722 Arlington County context, and the $2,448 Washington-Arlington-Alexandria metro context. The comparison establishes a lower ZIP index level at this observation, but differing geographic scopes and property mixes mean the wider values cannot replace ZIP evidence.","title":"The ZIP index is below wider-area context"},{"body":"The ACS matched ZCTA reports a $1,894 median gross rent for occupied renter homes, including selected utilities, whereas HUD lists a $2,210 two-bedroom FY2026 administrative standard. Neither is a direct asking-rent observation. Zillow ZORI is the relevant ZIP-level typical observed asking-rent index, while HUD supplies the relative ladder used to model bedroom estimates.","title":"The rent measures are not interchangeable"},{"body":"The 30% income screen yields $91,400 from the current ZIP index, while ACS median household income is $107,941. Separately, 41.12% of the 13,472 renter-occupied households are in the reported 30%-or-more burden group. These are aggregate arithmetic and survey facts; they cannot qualify an applicant, price an individual unit, or establish that vacancy is available for rent.","title":"Burden and vacancy remain aggregate indicators"}],"risks":["ZORI is a blended ZIP-level asking-rent index, so it cannot verify the base rent, concessions, included utilities, fees, availability date, condition, or bedroom classification of a specific dwelling.","ACS rent, income, burden, stock, and vacancy are five-year ZCTA survey estimates. Their statistical geography, occupied-home population, survey timing, and margins of error differ from the Zillow ZIP asking-rent universe.","Vacant housing is not synonymous with units for rent or immediately leasable supply. Total vacancy can include several non-occupancy statuses and does not show turnover, current advertised inventory, or property-level terms.","The historical index path has complete coverage in the packet, but its returns, volatility, drawdown, and discovery ranks are backward-looking descriptions and cannot establish future rents or asset outcomes."],"qa":[{"a":"For ZIP 22204 at the stated Zillow period, ZORI is a typical observed asking-rent index blended across rental types. It summarizes the ZIP-level observed asking-rent signal. It is not a count of active listings or vacant units, and it does not give a measured rent for a particular bedroom count, lease, or dwelling.","q":"What does Zillow ZORI measure for ZIP 22204?"},{"a":"ACS represents a five-year Census survey of occupied renter homes, with median gross rent including selected utilities; it uses the matched ZCTA, which is statistical geography rather than a USPS delivery ZIP. HUD is a bedroom-specific administrative FMR/SAFMR standard. Zillow ZORI instead tracks typical observed ZIP asking rents, so numerical gaps across these sources are descriptive rather than directly interchangeable.","q":"Why do the ACS, HUD, and Zillow rent values differ?"},{"a":"The bedroom figures start with the ZIP ZORI anchor and apply relative amounts from the local HUD ladder. This produces a consistent studio-through-four-bedroom set for comparison. It does not collect advertised or signed rents by bedroom group, account for unit amenities or condition, or establish the price of any particular listing.","q":"How were the bedroom estimates generated?"},{"a":"No. The required-income figure annualizes the ZIP asking-rent index and applies a 30% rent-to-income arithmetic screen. It is not advice, a lending standard, or an applicant qualification rule. Similarly, the ACS burden share describes renter households in aggregate; it cannot identify a renter, validate a household budget, or show whether a specific unit is affordable.","q":"Does the income screen establish affordability or applicant eligibility?"}],"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 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