At the June 2026 reading, 78209 has a Zillow ZORI of $1,550, down 2.3% from a year earlier, even as the direct Redfin rolling-three-month ZIP resale observation reported a $574,870 median sold price, up 12.2% year over year. That contrast—not a causal link—is the central decision tension: asking-rent momentum has cooled while the for-sale price measure strengthened. Annualizing the ZIP ZORI and dividing it by the median sold price gives a 3.24% cross-source screening ratio. It compares unlike series and does not measure property-level economics. Redfin records for-sale transactions, whereas ZORI tracks rental asking conditions; neither substitutes for the other.
Rent history makes the contrast more precise. Exact same-month ZORI changes are -2.25% over 1 year, -0.39% annualized over 3 years, and 1.53% annualized over 5 years. The recent decline confirms the 3-year softness but breaks from the five-year positive path. The history has complete coverage, with 127 readings and 126 consecutive monthly returns. Month-to-month return variability annualizes to 3.1%, which supports more confidence in one current snapshot than erratic data would. Separately, the largest peak-to-trough drop reached 4.0%, so the present snapshot should not be treated as a fixed anchor. On transparent national discovery ranks, stability is 1,737, momentum is 2,749, and the balanced result falls between them; lower ranks are higher. These are backward-looking measurements, not forecasts or investment recommendations.
Definitions explain why apparently close rent figures should not be merged. Zillow ZORI is a typical observed asking-rent index blended across rental types. In the ACS 2024 five-year survey of occupied renter homes, median gross rent is $1,447 and includes selected utilities. This five-digit label 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, so the geographic match supports context but does not make the data universes interchangeable. Gross-rent medians, asking-rent indices, and individual listings answer different questions.
Bedroom detail is a model, not a direct ZIP observation. The local HUD FMR/SAFMR ladder is an administrative bedroom-specific standard, not asking rent. Scaling ZIP ZORI through that ladder produces modelled estimates of $1,167, $1,282, $1,550, $1,990, and $2,315 in studio-through-four-bedroom order. They are modelled estimates, never measured bedroom rents. The ladder’s calibration to the ZIP index is not proof about an available apartment, lease terms, or utility charges. It supplies consistent bedroom sizing but cannot replace listing-level evidence.
An arithmetic affordability screen takes the current monthly index to $62,000 in required annual income when rent is set at 30% of income. It is arithmetic, not advice and not an applicant qualification rule. The matched ACS ZCTA median household income is $86,514, placing the index-based asking-rent screen at 21.5% of that median. Yet 45.4% of renter households reported gross-rent burdens at or above the same share threshold in the survey. That burden measure concerns surveyed occupied renter homes, includes its own household mix, and cannot prove the burden, rent, utilities, or availability of a particular unit. Its coexistence with the median-income screen highlights distributional differences that a ZIP median cannot resolve.
The ACS ZCTA housing-stock picture gives scale but not a real-time vacancy count. Among 23,033 housing units, the reported vacancy rate is 11.7%. The housing stock includes both single-family and larger multifamily buildings, but the survey cannot establish the condition or lease readiness of a particular property. For broader Zillow context only, San Antonio city-wide typical asking rent was $1,381.64, Bexar County-wide was $1,389, and the San Antonio-New Braunfels metro-wide figure was $1,416; those named wider scopes are not ZIP rental comps.
Resale liquidity tempers the price headline. In the same direct Redfin rolling-three-month ZIP resale observation, 155 homes sold, median marketing time was 58 days, and inventory was 343 homes, equivalent to 6.7 months of supply. Sellers averaged 96.6% of list price, while 9.3% of sales closed above list. These remain for-sale market signals, not rental transactions. The higher median sale price confirms a divergence from the falling rent index, while below-list average pricing, the recorded supply, and the limited above-list share challenge a uniformly tight resale interpretation. They do not demonstrate resale-driven rental conditions or a property’s economics.
Each source has a limit that protects against false precision. ZORI is an index, ACS is a survey, the HUD ladder is administrative, and Redfin is a rolling resale record; none supplies a lease, a rent roll, unit condition, or a matched sale-and-rental comparison. Property-level interpretation requires checking an address’s current asking terms, bedroom count, included utilities, concessions, lease length, occupied-versus-advertised status, and the comparability and closing dates of relevant sales. The reported vacancy rate is a ZCTA survey estimate rather than proof that a unit is vacant at any address. The unresolved question is: do those property details align with the cooling asking-rent history, or with the stronger yet less aggressive resale record?