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Sandy Oaks, Texas
Inside Sandy Oaks' city limits, shrink-swell clay limits houses without basements on 0% of mapped land. A shallow water table limits basements on 0%.
That clay share is below Bexar County's 51%. FEMA's flood data list no flood losses since 2016 in ZIP code 78112 overlapping the city. Of its 2,256 homes, 6% were built before 1980; the median dates from 1998.
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 1 overlapping ZIP
of homes built before 1980
Foundation repair in Sandy Oaks
Foundation repair in Sandy Oaks: shrink-swell clay limits slab homes on 0% of Sandy Oaks' mapped land.
About 600 of Sandy Oaks' 2,256 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 Sandy Oaks city limits
| Expansive clay (limits slab homes) | 0.0% |
| High water table (limits basements) | 0.0% |
| Septic fields very limited | 100.0% |
| Clay swell (LEP, by area) | 1.5% |
| High-swell land (LEP 6%+) | 0.0% |
| Mapped soil | 1,530 acres |
| Soil series | Share here | Series nationally: expansive clay |
|---|---|---|
| Aluf | over 99% | n/a |
| Zavala | under 1% | n/a |
| Gowen | under 1% | n/a |
What the numbers mean here
USDA rates 100% of the land very limited for septic absorption fields.
With shrink-swell clay on 0% and a shallow water table on 0% of the land, the soil survey points to neither problem across most of Sandy Oaks; conditions still vary lot by lot.
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 Sandy Oaks. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 78112 | 100% | 0 | $0 |
Homes in Sandy Oaks
| Housing units | 2,256 |
| Median year built | 1998 |
| Built before 1980 | 6% |
| Built 2000 or later | 43% |
| Owner-occupied | 96% |
| Median value, owner-occupied | $120,300 |
| Single-family detached | 25% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Elmendorf | 8 mi | 11% | under 1% |
| Poteet | 14 mi | 71% | under 1% |
| Floresville | 15 mi | 16% | under 1% |
| China Grove | 15 mi | 60% | 0% |
| Somerset | 15 mi | 10% | under 1% |
| Pleasanton | 16 mi | 8% | under 1% |
| Von Ormy | 16 mi | 43% | 0% |
| Kirby | 19 mi | 86% | 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