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Westlake, Texas
Inside Westlake's city limits, shrink-swell clay limits houses without basements on 40% of mapped land. A shallow water table limits basements on 9%.
That clay share is close to Tarrant County's 41%. FEMA's flood data list 18 flood losses since 2016 in the 2 ZIP codes overlapping the city. Of its 567 homes, 3% were built before 1980; the median dates from 2010.
Data as of October 13, 2026 · sources · in Tarrant 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 Westlake
Foundation repair in Westlake: shrink-swell clay limits slab homes on 40% of Westlake's mapped land.
About 600 of Westlake's 567 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 Westlake city limits
| Expansive clay (limits slab homes) | 39.6% |
| High water table (limits basements) | 9.0% |
| Septic fields very limited | 54.5% |
| Clay swell (LEP, by area) | 4.9% |
| High-swell land (LEP 6%+) | 39.6% |
| Mapped soil | 4,517 acres |
What the numbers mean here
Clay swell averages a linear extensibility of 4.9% by land area here, and 40% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 40% of the mapped land.
Clay shrinks as it dries: 100% of Tarrant County is in drought on the latest map, and 40% of Westlake's mapped land has shrink-swell clay.
USDA rates 55% of the land very limited for septic absorption fields.
Drought in Tarrant County
100% of Tarrant 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 Westlake. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 76262 | 87% | 18 | $846,929 |
| 76248 | 14% | 0 | $0 |
Homes in Westlake
| Housing units | 567 |
| Median year built | 2010 |
| Built before 1980 | 3% |
| Built 2000 or later | 94% |
| Owner-occupied | 97% |
| Median value, owner-occupied | $2,000,000 or more |
| Single-family detached | 97% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Trophy Club | 2 mi | 39% | 5% |
| Roanoke | 2 mi | 63% | under 1% |
| Keller | 4 mi | 54% | 9% |
| Southlake | 4 mi | 36% | 17% |
| Flower Mound | 6 mi | 29% | 1% |
| Northlake | 7 mi | 73% | under 1% |
| Colleyville | 7 mi | 27% | 14% |
| Bartonville | 8 mi | 4% | 2% |
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