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Pattison, Texas
Inside Pattison's city limits, shrink-swell clay limits houses without basements on 17% of mapped land, the 2nd-highest of 7 cities in Waller County. A shallow water table limits basements on 26%, the 5th-highest of 7 cities in Waller County.
That clay share is below Waller County's 24%. FEMA's flood data list 275 flood losses since 2016 in the 2 ZIP codes overlapping the city. Of its 223 homes, 31% were built before 1980; the median dates from 2000.
Data as of October 13, 2026 · sources · in Waller 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 Pattison
Foundation repair in Pattison: shrink-swell clay limits slab homes on 17% of Pattison's mapped land.
About 200 of Pattison's 223 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 Pattison city limits
| Expansive clay (limits slab homes) | 17.3% |
| High water table (limits basements) | 26.3% |
| Septic fields very limited | 88.3% |
| Clay swell (LEP, by area) | 4.5% |
| High-swell land (LEP 6%+) | 17.3% |
| Mapped soil | 2,252 acres |
| Soil series | Share here | Series nationally: expansive clay |
|---|---|---|
| Katy | 62% | 0% |
| Tabor | 13% | n/a |
| Cyfair | 7% | n/a |
| Gessner | 3% | n/a |
| Lake Charles | 3% | 97% |
| Styx | 2% | n/a |
What the numbers mean here
Clay swell averages a linear extensibility of 4.5% by land area here, and 17% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 17% of the mapped land.
Clay shrinks as it dries: 18.5% of Waller County is in drought on the latest map, and 17% of Pattison's mapped land has shrink-swell clay.
On 26% of Pattison's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
USDA rates 88% of the land very limited for septic absorption fields.
Drought in Waller County
18.5% of Waller 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 Pattison. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 77423 | 72% | 274 | $15.6 million |
| 77466 | 28% | 1 | $10,803 |
Homes in Pattison
| Housing units | 223 |
| Median year built | 2000 |
| Built before 1980 | 31% |
| Built 2000 or later | 50% |
| Owner-occupied | 89% |
| Median value, owner-occupied | $504,400 |
| Single-family detached | 80% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Brookshire | 3 mi | 2% | 18% |
| Brazos Country | 6 mi | 15% | 21% |
| San Felipe | 8 mi | 56% | 36% |
| Katy | 8 mi | 8% | 26% |
| South Frydek | 8 mi | 90% | 12% |
| Simonton | 10 mi | 41% | 2% |
| Fulshear | 10 mi | 17% | 27% |
| Weston Lakes | 11 mi | 32% | 6% |
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