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Windcrest, Texas
Inside Windcrest's city limits, shrink-swell clay limits houses without basements on 81% of mapped land, the 3rd-highest of 24 cities in Bexar County. A shallow water table limits basements on 0%.
That clay share is above Bexar County's 51%. FEMA's flood data list 13 flood losses since 2016 in the 2 ZIP codes overlapping the city. Of its 2,505 homes, 76% were built before 1980; the median dates from 1973.
Data as of October 13, 2026 · sources · in Bexar County
expansive clay: shrink-swell limits slab homes
high water table: limits basements
flood losses since 2016 in 2 overlapping ZIPs
of homes built before 1980
Foundation repair in Windcrest
Foundation repair in Windcrest: shrink-swell clay limits slab homes on 81% of Windcrest's mapped land, more than in 87% of Texas cities.
About 2,200 of Windcrest's 2,505 homes are detached houses.
| Who designs the repair | The ASCE Texas Section's repair guidelines say a Texas-licensed engineer should evaluate the foundation and design the repair (2022 guidelines) |
| Prices | Cost guide ranges compared |
Soil under Windcrest city limits
| Expansive clay (limits slab homes) | 81.2% |
| High water table (limits basements) | 0.0% |
| Septic fields very limited | 86.5% |
| Clay swell (LEP, by area) | 10.3% |
| High-swell land (LEP 6%+) | 63.5% |
| Mapped soil | 1,377 acres |
| Soil series | Share here | Series nationally: expansive clay |
|---|---|---|
| Houston Black | 29% | 91% |
| Branyon | 28% | 92% |
| Austin | 18% | 93% |
| Heiden | 14% | 80% |
| Eddy | 4% | 0% |
| Lewisville | 2% | n/a |
What the numbers mean here
Clay swell averages a linear extensibility of 10.3% by land area here, and 63% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 81% of the mapped land.
Clay shrinks as it dries: 79.6% of Bexar County is in drought on the latest map, and 81% of Windcrest's mapped land has shrink-swell clay.
USDA rates 87% of the land very limited for septic absorption fields.
Drought in Bexar County
79.6% of Bexar County is in drought (D1 or worse) on the October 13, 2026 map. County detail.
Flood losses by ZIP code
FEMA flood records since 2016 in the ZIP codes that overlap Windcrest. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 78239 | 81% | 10 | $267,907 |
| 78218 | 19% | 3 | $71,640 |
Homes in Windcrest
| Housing units | 2,505 |
| Median year built | 1973 |
| Built before 1980 | 76% |
| Built 2000 or later | 12% |
| Owner-occupied | 87% |
| Median value, owner-occupied | $302,000 |
| Single-family detached | 89% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Kirby | 4 mi | 86% | 0% |
| Live Oak | 4 mi | 46% | 0% |
| Converse | 5 mi | 85% | 0% |
| Terrell Hills | 5 mi | 74% | 0% |
| Universal City | 5 mi | 63% | 0% |
| Alamo Heights | 6 mi | 43% | 0% |
| Selma | 6 mi | 60% | 0% |
| Olmos Park | 7 mi | 65% | 0% |
Sources: USDA SSURGO (August 5, 2026) · US Drought Monitor (October 13, 2026) · FEMA NFIP v3 (September 9, 2026) · Census ACS 2020-2024. Methods · Data status