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Liberty Hill, Texas
Inside Liberty Hill's city limits, shrink-swell clay limits houses without basements on 56% of mapped land, higher than 62% of Texas cities. A shallow water table limits basements on 0%.
That clay share is close to Williamson County's 60%. FEMA's flood data list 23 flood losses since 2016 in ZIP code 78642 overlapping the city. Of its 2,719 homes, 6% were built before 1980; the median dates from 2017.
Data as of October 13, 2026 · sources · in Williamson 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 Liberty Hill
Foundation repair in Liberty Hill: shrink-swell clay limits slab homes on 56% of Liberty Hill's mapped land, more than in 62% of Texas cities.
About 1,800 of Liberty Hill's 2,719 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 Liberty Hill city limits
| Expansive clay (limits slab homes) | 55.5% |
| High water table (limits basements) | 0.0% |
| Septic fields very limited | 86.6% |
| Clay swell (LEP, by area) | 6.5% |
| High-swell land (LEP 6%+) | 55.5% |
| Mapped soil | 2,970 acres |
What the numbers mean here
Clay swell averages a linear extensibility of 6.5% by land area here, and 56% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 56% of the mapped land.
Clay shrinks as it dries: 100% of Williamson County is in drought on the latest map, and 56% of Liberty Hill's mapped land has shrink-swell clay.
USDA rates 87% of the land very limited for septic absorption fields.
Drought in Williamson County
100% of Williamson 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 Liberty Hill. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 78642 | 92% | 23 | $2.3 million |
Homes in Liberty Hill
| Housing units | 2,719 |
| Median year built | 2017 |
| Built before 1980 | 6% |
| Built 2000 or later | 86% |
| Owner-occupied | 61% |
| Median value, owner-occupied | $403,200 |
| Single-family detached | 65% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Leander | 7 mi | 48% | under 1% |
| Bertram | 11 mi | 39% | 0% |
| Cedar Park | 12 mi | 48% | 0% |
| Georgetown | 12 mi | 42% | under 1% |
| Jonestown | 13 mi | 2% | 0% |
| Florence | 14 mi | 74% | under 1% |
| Volente | 15 mi | 1% | 0% |
| Lago Vista | 15 mi | 4% | 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