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Hamilton, Texas
Inside Hamilton's city limits, shrink-swell clay limits houses without basements on 50% of mapped land, higher than 57% of Texas cities. A shallow water table limits basements on 0%.
That clay share is above Hamilton County's 31%. FEMA's flood data list no flood losses since 2016 in ZIP code 76531 overlapping the city. Of its 1,364 homes, 79% were built before 1980; the median dates from 1959.
Data as of October 13, 2026 · sources · in Hamilton 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 Hamilton
Foundation repair in Hamilton: shrink-swell clay limits slab homes on 50% of Hamilton's mapped land, more than in 57% of Texas cities.
About 1,200 of Hamilton's 1,364 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 Hamilton city limits
| Expansive clay (limits slab homes) | 49.6% |
| High water table (limits basements) | 0.0% |
| Septic fields very limited | 81.0% |
| Clay swell (LEP, by area) | 6.0% |
| High-swell land (LEP 6%+) | 49.6% |
| Mapped soil | 2,259 acres |
| Soil series | Share here | Series nationally: expansive clay |
|---|---|---|
| Nuff | 29% | n/a |
| Frio | 13% | n/a |
| Fairy | 9% | n/a |
| Hico | 7% | n/a |
| Pidcoke | 6% | n/a |
| Slidell | 5% | n/a |
What the numbers mean here
Clay swell averages a linear extensibility of 6.0% by land area here, and 50% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 50% of the mapped land.
Clay shrinks as it dries: 100% of Hamilton County is in drought on the latest map, and 50% of Hamilton's mapped land has shrink-swell clay.
USDA rates 81% of the land very limited for septic absorption fields.
Drought in Hamilton County
100% of Hamilton 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 Hamilton. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 76531 | 100% | 0 | $0 |
Homes in Hamilton
| Housing units | 1,364 |
| Median year built | 1959 |
| Built before 1980 | 79% |
| Built 2000 or later | 3% |
| Owner-occupied | 69% |
| Median value, owner-occupied | $102,100 |
| Single-family detached | 85% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Evant | 16 mi | 32% | 0% |
| Cranfills Gap | 18 mi | 48% | 0% |
| Gustine | 19 mi | 19% | 5% |
| Hico | 20 mi | 39% | 1% |
| Iredell | 25 mi | 11% | 5% |
| Gatesville | 28 mi | 21% | under 1% |
| Dublin | 30 mi | 28% | under 1% |
| South Mountain | 32 mi | 17% | 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