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Charlotte, Texas
Inside Charlotte's city limits, shrink-swell clay limits houses without basements on 58% of mapped land, the 3rd-highest of 6 cities in Atascosa County. A shallow water table limits basements on under 1%.
That clay share is above Atascosa County's 34%. FEMA's flood data list no flood losses since 2016 in ZIP code 78011 overlapping the city. Of its 605 homes, 50% were built before 1980; the median dates from 1980.
Data as of October 13, 2026 · sources · in Atascosa 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 Charlotte
Foundation repair in Charlotte: shrink-swell clay limits slab homes on 58% of Charlotte's mapped land, more than in 64% of Texas cities.
About 300 of Charlotte's 605 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 Charlotte city limits
| Expansive clay (limits slab homes) | 58.0% |
| High water table (limits basements) | 0.2% |
| Septic fields very limited | 85.0% |
| Clay swell (LEP, by area) | 5.7% |
| High-swell land (LEP 6%+) | 37.0% |
| Mapped soil | 1,308 acres |
| Soil series | Share here | Series nationally: expansive clay |
|---|---|---|
| Webb | 21% | n/a |
| Amphion | 15% | n/a |
| Hanis | 13% | n/a |
| Floresville | 12% | n/a |
| Elmendorf | 11% | n/a |
| Denhawken | 9% | n/a |
What the numbers mean here
Clay swell averages a linear extensibility of 5.7% by land area here, and 37% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 58% of the mapped land.
Clay shrinks as it dries: 100% of Atascosa County is in drought on the latest map, and 58% of Charlotte's mapped land has shrink-swell clay.
USDA rates 85% of the land very limited for septic absorption fields.
Drought in Atascosa County
100% of Atascosa 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 Charlotte. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 78011 | 100% | 0 | $0 |
Homes in Charlotte
| Housing units | 605 |
| Median year built | 1980 |
| Built before 1980 | 50% |
| Built 2000 or later | 36% |
| Owner-occupied | 90% |
| Median value, owner-occupied | $86,900 |
| Single-family detached | 44% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Jourdanton | 10 mi | 65% | under 1% |
| Christine | 13 mi | 39% | under 1% |
| Pleasanton | 14 mi | 8% | under 1% |
| Poteet | 15 mi | 71% | under 1% |
| Devine | 23 mi | 16% | under 1% |
| Pearsall | 24 mi | 1% | 1% |
| Natalia | 24 mi | 10% | under 1% |
| Somerset | 26 mi | 10% | 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