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San Leanna, Texas
Inside San Leanna's city limits, shrink-swell clay limits houses without basements on 35% of mapped land. A shallow water table limits basements on 0%.
That clay share is close to Travis County's 39%. FEMA's flood data list 9 flood losses since 2016 in the 2 ZIP codes overlapping the city. Of its 570 homes, 24% were built before 1980; the median dates from 2013.
Data as of October 13, 2026 · sources · in Travis 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 San Leanna
Foundation repair in San Leanna: shrink-swell clay limits slab homes on 35% of San Leanna's mapped land.
About 300 of San Leanna's 570 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 San Leanna city limits
| Expansive clay (limits slab homes) | 34.6% |
| High water table (limits basements) | 0.0% |
| Septic fields very limited | 92.8% |
| Clay swell (LEP, by area) | 5.1% |
| High-swell land (LEP 6%+) | 31.9% |
| Mapped soil | 283 acres |
What the numbers mean here
Clay swell averages a linear extensibility of 5.1% by land area here, and 32% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 35% of the mapped land.
Clay shrinks as it dries: 100% of Travis County is in drought on the latest map, and 35% of San Leanna's mapped land has shrink-swell clay.
USDA rates 93% of the land very limited for septic absorption fields.
Drought in Travis County
100% of Travis 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 San Leanna. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 78748 | 80% | 5 | $34,374 |
| 78652 | 20% | 4 | $39,615 |
Homes in San Leanna
| Housing units | 570 |
| Median year built | 2013 |
| Built before 1980 | 24% |
| Built 2000 or later | 69% |
| Owner-occupied | 53% |
| Median value, owner-occupied | $617,500 |
| Single-family detached | 48% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Hays | 4 mi | 25% | 0% |
| Buda | 5 mi | 61% | under 1% |
| Sunset Valley | 6 mi | 58% | 0% |
| Creedmoor | 7 mi | 85% | under 1% |
| Bear Creek | 8 mi | 6% | 0% |
| Mountain City | 8 mi | 17% | 0% |
| Rollingwood | 9 mi | 3% | 0% |
| Mustang Ridge | 10 mi | 88% | under 1% |
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