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Silverton, Texas
Inside Silverton's city limits, shrink-swell clay limits houses without basements on 100% of mapped land, higher than 100% of Texas cities. A shallow water table limits basements on 0%.
That clay share is above Briscoe County's 40%. FEMA's flood data list no flood losses since 2016 in ZIP code 79257 overlapping the city. Of its 294 homes, 88% were built before 1980; the median dates from 1959.
Data as of October 13, 2026 · sources · in Briscoe 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 Silverton
Foundation repair in Silverton: shrink-swell clay limits slab homes on 100% of Silverton's mapped land, more than in 100% of Texas cities.
About 300 of Silverton's 294 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 Silverton city limits
| Expansive clay (limits slab homes) | 100.0% |
| High water table (limits basements) | 0.0% |
| Septic fields very limited | 98.0% |
| Clay swell (LEP, by area) | 6.2% |
| High-swell land (LEP 6%+) | 98.0% |
| Mapped soil | 643 acres |
What the numbers mean here
Clay swell averages a linear extensibility of 6.2% by land area here, and 98% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 100% of the mapped land.
Clay shrinks as it dries: 100% of Briscoe County is in drought on the latest map, and 100% of Silverton's mapped land has shrink-swell clay.
USDA rates 98% of the land very limited for septic absorption fields.
Drought in Briscoe County
100% of Briscoe 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 Silverton. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 79257 | 100% | 0 | $0 |
Homes in Silverton
| Housing units | 294 |
| Median year built | 1959 |
| Built before 1980 | 88% |
| Built 2000 or later | 2% |
| Owner-occupied | 83% |
| Median value, owner-occupied | $77,900 |
| Single-family detached | 95% |
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