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Millsap, Texas
Inside Millsap's city limits, shrink-swell clay limits houses without basements on 76% of mapped land, the highest of 14 cities in Parker County. A shallow water table limits basements on 11%, the 4th-highest of 14 cities in Parker County.
That clay share is above Parker County's 21%. FEMA's flood data list 5 flood losses since 2016 in ZIP code 76066 overlapping the city. Of its 149 homes, 71% were built before 1980; the median dates from 1970.
Data as of October 13, 2026 · sources · in Parker 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 Millsap
Foundation repair in Millsap: shrink-swell clay limits slab homes on 76% of Millsap's mapped land, more than in 80% of Texas cities.
About 100 of Millsap's 149 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 Millsap city limits
| Expansive clay (limits slab homes) | 75.8% |
| High water table (limits basements) | 10.8% |
| Septic fields very limited | 83.5% |
| Clay swell (LEP, by area) | 5.6% |
| High-swell land (LEP 6%+) | 24.2% |
| Mapped soil | 944 acres |
| Soil series | Share here | Series nationally: expansive clay |
|---|---|---|
| Truce | 50% | 47% |
| Thurber | 16% | n/a |
| Hassee | 11% | n/a |
| Owens | 5% | n/a |
| Bonti | 4% | n/a |
| Duffau | 3% | n/a |
What the numbers mean here
Clay swell averages a linear extensibility of 5.6% by land area here, and 24% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 76% of the mapped land.
Clay shrinks as it dries: 100% of Parker County is in drought on the latest map, and 76% of Millsap's mapped land has shrink-swell clay.
USDA rates 84% of the land very limited for septic absorption fields.
Drought in Parker County
100% of Parker 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 Millsap. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 76066 | 100% | 5 | $76,990 |
Homes in Millsap
| Housing units | 149 |
| Median year built | 1970 |
| Built before 1980 | 71% |
| Built 2000 or later | 17% |
| Owner-occupied | 95% |
| Median value, owner-occupied | $210,200 |
| Single-family detached | 75% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Cool | 3 mi | 22% | 2% |
| Mineral Wells | 6 mi | 42% | 4% |
| Dennis | 11 mi | 17% | under 1% |
| Peaster | 11 mi | 33% | 1% |
| Weatherford | 14 mi | 18% | 7% |
| Lipan | 16 mi | 61% | 8% |
| Hudson Oaks | 18 mi | 14% | 1% |
| Graford | 19 mi | 56% | 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