ZIP 78247 is both a Zillow ZIP market identifier and a matched Census ZCTA. A ZCTA is a statistical area used for Census reporting, not an area identical to a USPS delivery ZIP. In June 2026, Zillow’s typical observed asking-rent index, which blends rental types, was $1,487. That index was down 1.3% on the same month a year earlier. The backward-looking path breaks from its longer rise: the same-month change was negative over 1 year and 3 years at 1.8% annually, yet positive over 5 years at 2.0% annually. Annualized monthly-return variability was 2.1%, so one current reading should not be treated as a fixed market level. The historical decline from a prior high reached 5.4%, reinforcing the cooling classification rather than providing a forecast. Coverage was 100%; transparent national discovery ranks placed momentum at 2,737 and stability at 228, with lower ranks representing stronger placement.
The current asking-rent index should not be merged with ACS rent evidence. The ACS 2024 five-year ZCTA survey reports a $1,563 median gross rent for occupied renter homes, and gross rent includes selected utilities; Zillow’s asking-rent index was therefore 95.1% of that survey median. Neither figure is a lease quote for a particular home, and their difference can reflect timing, tenant occupancy, utilities, and source design. For wider context only, the San Antonio city rent context was $1,382, the Bexar County rent context was $1,389, and the San Antonio-New Braunfels metro rent context was $1,416. Those city, county, and metro values are not substitutes for ZIP-level rent evidence.
The bedroom ladder is a modelling device, not a set of measured bedroom rents. It scales the ZIP Zillow asking-rent index by the local HUD ladder to produce modelled monthly estimates of $1,124 for a studio, $1,224 for a one-bedroom, $1,487 for a two-bedroom, $1,904 for a three-bedroom, and $2,221 for a four-bedroom. HUD’s FY2026 ladder runs from $1,240 for a studio to $2,450 for a four-bedroom. HUD FMR or SAFMR is an administrative bedroom-specific standard, not asking rent, so the ladder helps maintain local bedroom spacing but does not establish what a particular available unit is being marketed for.
The income screen is arithmetic rather than advice, an applicant qualification rule, or a claim about household finances. Applying a 30% rent-to-income calculation to the ZIP asking-rent index produces required annual income of $59,480. That is below the ZCTA’s $91,013 median household income, and the index equals 19.6% of that median when annualized. Yet ACS burden evidence introduces a separate household-level tension: 2,218 of 4,497 occupied renter households, or 49.3%, reported spending at least 30% of income on gross rent. Because ACS estimates are survey measures with stated uncertainty, the burden share describes the renter population rather than proving that any specific available property is affordable or unaffordable.
Housing composition offers another boundary on interpretation. The matched ZCTA contained 20,359 housing units, with renter-occupied homes representing 22.9% of occupied units. Its reported vacancy rate was 3.7%, materially narrower than the wider city and county context rates supplied in the packet, while 334 units were classified as vacant for rent. The stock was predominantly single-family rather than large multifamily. These counts and shares describe Census housing stock, not real-time availability, lease concessions, property condition, or the number of comparable homes competing for a tenant at a given moment. A vacant-for-rent classification also cannot establish vacancy at a particular address.
Direct resale evidence shows a distinct for-sale market rather than rental transactions. In Redfin’s rolling ZIP resale observation, the median sold price was $289,934, down 5.3% year over year. There were 153 homes sold, median marketing time was 42 days, and inventory stood at 206 homes with 4.1 months of supply. Sale-to-list conditions were below full list price on average at 98.0%; 17.5% of sales closed above list, while 33.3% of listings went off market within two weeks. These measures describe resale liquidity and pricing signals only. Annualized ZIP Zillow asking rent divided by median sold price produces a 6.2% cross-source screening ratio, not a cap rate, net return, expected return, property yield, or measure of property economics.
The main decision tension is that asking rents have cooled only modestly over the latest year while ZIP resale prices fell more sharply, even as the longer five-year rent history remains positive. The resale picture therefore challenges any simple reading that a historical rent gain alone characterizes current market conditions. Conversely, the ZIP asking-rent index sits below ACS median gross rent and the arithmetic income screen is below the area median household income, but the substantial ACS gross-rent burden share prevents those aggregate comparisons from being treated as household outcomes. The relatively strong stability rank supports confidence that the historical series is consistently observed; it does not convert past rent movement into a prediction or investment conclusion.
Several limits remain material. Zillow ZORI is a blended asking-rent index rather than a unit-level rent roll, ACS is a five-year survey of occupied homes rather than current listings, HUD is an administrative standard, and Redfin is direct ZIP resale evidence rather than rental evidence. Property-level review should verify the advertised rent, lease term, included and excluded utilities, bedroom count, unit type, concessions, move-in charges, condition, occupancy status, and whether the address is actually within the relevant ZIP and ZCTA match. It should also compare the specific property’s list and sale history separately from rental evidence. Does the individual unit’s documented lease package support the broad ZIP screens without assuming that any aggregate measure applies directly to it?