Ashburn’s ZIP market begins with a near-term cooling signal, an early contrast to its longer rental record and for-sale indicators. Zillow’s June 2026 ZORI is $2,844 per month, 0.7% below its year-earlier level. ZORI is a typical observed asking-rent index blended across rental types, not a survey of tenants or a bedroom-specific rent measure. For wider context only, the Ashburn city-context rent is $2,994.96, the Loudoun County county-context rent is $2,917, and the Washington-Arlington-Alexandria, DC-VA-MD-WV metro-context rent is $2,448. Those city, county, and metro figures frame the ZIP index; they do not replace a direct ZIP observation.
ZIP 20147 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 $2,416, which is 17.7% below ZORI. ACS is a five-year survey of occupied renter homes and median gross rent includes selected utilities, so it is a different evidence universe from current asking rent. HUD’s local two-bedroom FMR/SAFMR is $2,520, and ZORI is 12.9% higher. This HUD figure is an administrative, bedroom-specific standard, not asking rent.
The bedroom view should therefore be read as a model rather than as a ZIP rent survey. Scaling ZIP ZORI with the local HUD ladder produces modelled monthly estimates of $2,472 for a studio, $2,551 for one bedroom, $2,844 for two bedrooms, $3,589 for three bedrooms, and $4,221 for four bedrooms. These are modelled estimates, never measured bedroom rents: the HUD ladder sets relative spacing, while the Zillow index supplies the ZIP-level asking-rent anchor. The two-bedroom estimate equals the overall index because of that scaling method, not because every two-bedroom listing asks that amount.
Income and burden measurements create a second tension. Applying the 30% required-income screen to annualized ZORI produces $113,760, versus an ACS ZCTA median household income of $163,904; the resulting asking-rent-to-income screen is 20.8%. This is arithmetic, not advice and not an applicant qualification rule. Yet the ACS survey reports 43.4% of renter-occupied homes at or above the same burden threshold. That share describes surveyed occupied households, not a prospective renter or a particular available unit. It also cannot establish which utilities, lease terms, or household incomes apply to an individual property.
ACS stock counts provide broad ZCTA context rather than a live availability feed. The survey estimates 26,008 housing units, including 8,094 renter-occupied homes, and 830 vacant units, for a 3.2% vacancy rate. It identifies 426 units as vacant for rent, a classification that does not indicate their price, bedroom count, condition, timing, or whether they are currently marketable. These stock and vacancy measures should not be converted into proof that a particular unit can be leased. They instead delimit the survey’s aggregate housing and renter base behind the burden results.
Zillow’s direct ZIP historical record clarifies why the current dip should not be read as the whole path. Exact same-month annualized ZORI change is -0.7% over one year, +3.4% over three years, and +4.8% over five years. The negative recent result breaks from, rather than confirms, the longer measured increase. The backward-looking series has 100% coverage across 138 observations, annualized monthly-return variability of 2.1%, and a maximum drawdown of -3.6%. Those measures provide a documented basis for confidence in one current ZIP snapshot, but that confidence applies to index continuity rather than any individual listing and does not forecast future asking rents. In transparent national discovery ranks among history-eligible ZIPs, momentum ranks 1,862, stability 183, and balanced performance 955; lower rank is higher. These are discovery measurements, not investment recommendations.
Redfin supplies a separate, direct rolling-three-month ZIP resale observation, not rental transactions. Its median sold price is $732,330, down 0.7% from a year earlier, with 251 homes sold and a median 27 days on market. Inventory is 147 homes and months of supply is 1.8. The average sale-to-list result is 100.99%, and 46.8% of sales closed above list. Thus, the sale-price change confirms the direction of the one-year ZORI decline, while the supply and sale-to-list signals challenge any inference from rent cooling and the arithmetic income screen that conditions are broadly loose. Annualized ZIP ZORI divided by median sold price is 4.66%, only a cross-source screening ratio, not a measure of property economics or a prospective outcome. These resale measures describe for-sale liquidity, price, and marketing only.
No source in this packet establishes the rent, utility bill, sale economics, or availability of a specific property. Zillow is a blended asking-rent index; ACS is a retrospective survey of occupied homes; HUD is a standard; and Redfin is a resale record. A property-level review would need to match the advertised rent to the actual bedroom count and lease terms, identify included utilities, confirm the property’s ZIP-market treatment and current availability, and separately verify the listed and sold-price record, marketing period, and sale-to-list result. It should also keep the ZCTA’s statistical boundary distinct from a USPS delivery ZIP. Does the subject property’s documented rent, bedroom, utility, sale, and timing details actually match the separate measures used here?