At the June 2026 endpoint, Zillow’s ZIP-level ZORI for 78218 was $1,386, down 6.66% from the same month a year earlier. ZORI is a typical observed asking-rent index blended across rental types, rather than a lease ledger or a single-property quotation. The most immediate tension is that the direct Redfin rolling-three-month ZIP resale observation showed a $234,947 median sold price, up 7.77% year over year, while the asking-rent index was cooling. Its 6.8 months of supply and 96.58% average sale-to-list ratio also belong entirely to the for-sale market. They are not evidence about rental transactions, landlord revenue, or a specific home’s lease terms.
The rental history supports a cooling reading, but it is not uniformly negative across every horizon. The one-year same-month change was -6.66%, following a -0.79% annualized change across three years; both measures contrast with a 2.16% annualized gain across five years. In other words, recent direction breaks from the longer positive path, rather than confirming it. Coverage was 99.17%, so the history is nearly complete. Monthly ZORI changes showed 3.04% annualized variability, which argues against treating one current index point as unusually precise. Separately, the maximum drawdown was 9.91%, documenting a meaningful historical retreat from a prior peak. The transparent national discovery ranks among history-eligible ZIPs were 2,858 for momentum and 1,690 for stability, where a lower rank is higher; these are backward-looking discovery tools, not forecasts or investment recommendations.
The five-digit label is both Zillow’s ZIP market identifier and a matched Census ZCTA. A ZCTA is a statistical area and is not identical to a USPS delivery ZIP. In the ACS 2024 five-year ZCTA survey, median gross rent was $1,215, placing the current Zillow asking-rent index 14.07% higher. That survey describes occupied renter homes and includes selected utilities, so it should not be substituted for ZORI. HUD’s FY2026 local two-bedroom standard was $1,320; it is an administrative, bedroom-specific benchmark rather than asking rent. For wider context only, the San Antonio city rent context was $1,381.64, the Bexar County rent context was $1,389, and the San Antonio-New Braunfels, TX metro rent context was $1,416. These are broader-area comparisons, not ZIP rental comps.
The bedroom figures are modelled estimates created by scaling ZIP ZORI with the local HUD bedroom ladder. They indicate about $1,050 for a studio, $1,386 for a two-bedroom home, and $2,068 for a four-bedroom home. These are not measured bedroom rents, and they do not establish what any available unit is advertised for. The HUD ladder supplies the relative bedroom shape, while ZORI supplies the ZIP-level rent anchor; HUD itself remains an administrative standard, not a record of prevailing asking rents. This approach is useful for comparing bedroom scale within the ZIP, but it cannot capture building age, included utilities, furnishing, concessions, lease length, condition, or other unit-specific differences.
The arithmetic income screen is close to the ACS household-income benchmark but should be read cautiously. Applying a 30% share of gross income to the $1,386 ZORI produces required annual income of $55,440. ACS median household income was $57,285, and the index-to-income calculation equals 29.03%. This is arithmetic, not advice and not an applicant qualification rule. The occupied-renter survey adds a different pressure signal: 54.53% of the 4,294 measured renter households out of 7,874 reported spending at least the burden threshold on gross rent. Because that measure uses occupied homes, survey income, and gross rent with selected utilities, it cannot prove that a particular advertised apartment is affordable or burdensome.
The ACS ZCTA counted 16,121 housing units, including 928 vacant units, for a 5.76% vacancy rate. Renter occupancy represented more than half of occupied housing, while the stock was predominantly single-family rather than large multifamily. Most vacant units were classified for rent, but that category is not proof that a comparable unit is immediately available, competitively priced, habitable, or suitable for a particular household. Vacancy and tenure figures describe the surveyed area’s housing stock at a point in time; they do not identify concessions, turnover timing, occupied condition, or the rent on any individual home.
Resale liquidity is mixed rather than uniformly strong. Redfin recorded 55 homes sold in its direct rolling resale window, and the median marketing time was also 55 days. The listing, inventory, pending-sale, supply, and sale-to-list measures in that block all describe ZIP for-sale activity only. The price increase therefore challenges the rent-history cooling signal, while the below-list sale-to-list result and elevated supply temper a simple strength reading. Annualizing ZIP ZORI and dividing it by the median sold price produces a 7.08% cross-source screening ratio only. It does not incorporate operating costs, financing, taxes, insurance, vacancy, property condition, or the match between a sold home and a rental unit.
The evidence is strongest when each source remains in its own universe: Zillow for typical asking-rent direction, ACS for surveyed occupied households and burden, HUD for administrative bedroom standards, and Redfin for direct ZIP resale activity. Before relying on any property-level conclusion, verify the live advertised rent, bedroom count, included utilities, fees, concessions, lease duration, availability date, property type, condition, and whether the unit matches the index’s blended rental mix. For a sale comparison, confirm the closing date, list history, physical attributes, and whether nearby sold homes are genuinely comparable. The remaining decision question is whether a specific available rental or resale property actually resembles the broad ZIP measures described here.