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Granger, Texas
Inside Granger's city limits, shrink-swell clay limits houses without basements on 85% of mapped land, the highest of 14 cities in Williamson County. A shallow water table limits basements on under 1%.
That clay share is above Williamson County's 60%. FEMA's flood data list no flood losses since 2016 in ZIP code 76530 overlapping the city. Of its 485 homes, 75% were built before 1980; the median dates from 1967.
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 Granger
Foundation repair in Granger: shrink-swell clay limits slab homes on 85% of Granger's mapped land, more than in 93% of Texas cities.
About 300 of Granger's 485 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 Granger city limits
| Expansive clay (limits slab homes) | 85.0% |
| High water table (limits basements) | 0.3% |
| Septic fields very limited | 85.0% |
| Clay swell (LEP, by area) | 12.8% |
| High-swell land (LEP 6%+) | 85.0% |
| Mapped soil | 426 acres |
| Soil series | Share here | Series nationally: expansive clay |
|---|---|---|
| Branyon | 72% | 92% |
| Heiden | 7% | 80% |
| Houston Black | 5% | 91% |
| Tinn | 5% | n/a |
| Lewisville | 4% | n/a |
| Burleson | 4% | 84% |
What the numbers mean here
Clay swell averages a linear extensibility of 12.8% by land area here, and 85% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 85% of the mapped land.
Clay shrinks as it dries: 100% of Williamson County is in drought on the latest map, and 85% of Granger's mapped land has shrink-swell clay.
USDA rates 85% 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 Granger. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 76530 | 100% | 0 | $0 |
Homes in Granger
| Housing units | 485 |
| Median year built | 1967 |
| Built before 1980 | 75% |
| Built 2000 or later | 12% |
| Owner-occupied | 77% |
| Median value, owner-occupied | $185,100 |
| Single-family detached | 70% |
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