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Comanche, Texas
Inside Comanche's city limits, shrink-swell clay limits houses without basements on 46% of mapped land, the highest of 3 cities in Comanche County. A shallow water table limits basements on 4%, the 3rd-highest of 3 cities in Comanche County.
That clay share is above Comanche County's 30%. FEMA's flood data list 1 flood losses since 2016 in ZIP code 76442 overlapping the city. Of its 1,790 homes, 65% were built before 1980; the median dates from 1966.
Data as of October 13, 2026 · sources · in Comanche 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 Comanche
Foundation repair in Comanche: shrink-swell clay limits slab homes on 46% of Comanche's mapped land, more than in 53% of Texas cities.
About 1,400 of Comanche's 1,790 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 Comanche city limits
| Expansive clay (limits slab homes) | 45.5% |
| High water table (limits basements) | 3.6% |
| Septic fields very limited | 57.8% |
| Clay swell (LEP, by area) | 5.6% |
| High-swell land (LEP 6%+) | 37.0% |
| Mapped soil | 2,920 acres |
| Soil series | Share here | Series nationally: expansive clay |
|---|---|---|
| Krum | 15% | n/a |
| Blanket | 14% | n/a |
| Bolar | 13% | n/a |
| Pedernales | 8% | n/a |
| Chaney | 6% | n/a |
| Denton | 5% | n/a |
What the numbers mean here
Clay swell averages a linear extensibility of 5.6% by land area here, and 37% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 46% of the mapped land.
Clay shrinks as it dries: 100% of Comanche County is in drought on the latest map, and 46% of Comanche's mapped land has shrink-swell clay.
USDA rates 58% of the land very limited for septic absorption fields.
Drought in Comanche County
100% of Comanche 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 Comanche. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 76442 | 100% | 1 | $0 |
Homes in Comanche
| Housing units | 1,790 |
| Median year built | 1966 |
| Built before 1980 | 65% |
| Built 2000 or later | 12% |
| Owner-occupied | 68% |
| Median value, owner-occupied | $125,700 |
| Single-family detached | 80% |
Nearby cities
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