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McLendon-Chisholm, Texas
Inside McLendon-Chisholm's city limits, shrink-swell clay limits houses without basements on 81% of mapped land, higher than 86% of Texas cities. A shallow water table limits basements on 1%, the 3rd-highest of 6 cities in Rockwall County.
That clay share is above Rockwall County's 72%. FEMA's flood data list 13 flood losses since 2016 in ZIP code 75032 overlapping the city. Of its 1,503 homes, 6% were built before 1980; the median dates from 2013.
Data as of October 13, 2026 · sources · in Rockwall 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 McLendon-Chisholm
Foundation repair in McLendon-Chisholm: shrink-swell clay limits slab homes on 81% of McLendon-Chisholm's mapped land, more than in 86% of Texas cities.
About 1,500 of McLendon-Chisholm's 1,503 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 McLendon-Chisholm city limits
| Expansive clay (limits slab homes) | 80.6% |
| High water table (limits basements) | 0.5% |
| Septic fields very limited | 80.6% |
| Clay swell (LEP, by area) | 11.9% |
| High-swell land (LEP 6%+) | 80.6% |
| Mapped soil | 8,247 acres |
| Soil series | Share here | Series nationally: expansive clay |
|---|---|---|
| Houston Black | 52% | 91% |
| Heiden | 17% | 80% |
| Trinity | 10% | n/a |
| Ferris | 7% | n/a |
| Burleson | 5% | 84% |
| Fairlie | 3% | 70% |
What the numbers mean here
Clay swell averages a linear extensibility of 11.9% by land area here, and 81% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 81% of the mapped land.
Clay shrinks as it dries: 100% of Rockwall County is in drought on the latest map, and 81% of McLendon-Chisholm's mapped land has shrink-swell clay.
USDA rates 81% of the land very limited for septic absorption fields.
Drought in Rockwall County
100% of Rockwall 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 McLendon-Chisholm. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 75032 | 98% | 13 | $267,391 |
Homes in McLendon-Chisholm
| Housing units | 1,503 |
| Median year built | 2013 |
| Built before 1980 | 6% |
| Built 2000 or later | 84% |
| Owner-occupied | 99% |
| Median value, owner-occupied | $629,400 |
| Single-family detached | 99% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Heath | 4 mi | 82% | 3% |
| Mobile City | 5 mi | 82% | 0% |
| Rockwall | 6 mi | 83% | under 1% |
| Fate | 7 mi | 81% | under 1% |
| Poetry | 7 mi | 76% | 24% |
| Forney | 8 mi | 83% | 3% |
| Royse City | 10 mi | 87% | 4% |
| Terrell | 10 mi | 81% | 12% |
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