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Lewisville, Texas
Inside Lewisville's city limits, shrink-swell clay limits houses without basements on 49% of mapped land, higher than 56% of Texas cities. A shallow water table limits basements on 4%.
That clay share is close to Denton County's 50%. FEMA's flood data list 25 flood losses since 2016 in the 4 ZIP codes overlapping the city. Of its 54,237 homes, 14% were built before 1980; the median dates from 1997.
Data as of November 3, 2026 · sources · in Denton County
expansive clay: shrink-swell limits slab homes
high water table: limits basements
flood losses since 2016 in 4 overlapping ZIPs
of homes built before 1980
Foundation repair in Lewisville
Foundation repair in Lewisville: shrink-swell clay limits slab homes on 49% of Lewisville's mapped land, more than in 56% of Texas cities.
The city lists a permit for the work.
About 24,900 of Lewisville's 54,237 homes are detached houses.
| City permit | Lewisville's building permit kiosk lists foundation repairs as a residential permit type. (City of Lewisville, Building Services, read October 2, 2026) |
| 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 Lewisville city limits
| Expansive clay (limits slab homes) | 49.0% |
| High water table (limits basements) | 4.2% |
| Septic fields very limited | 69.9% |
| Clay swell (LEP, by area) | 8.6% |
| High-swell land (LEP 6%+) | 52.1% |
| Urban land, not rated | 3.5% |
| Mapped soil | 30,073 acres |
What the numbers mean here
Clay swell averages a linear extensibility of 8.6% by land area here, and 52% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 49% of the mapped land.
Clay shrinks as it dries: 39.7% of Denton County is in drought on the latest map, and 49% of Lewisville's mapped land has shrink-swell clay.
USDA rates 70% of the land very limited for septic absorption fields.
Lewisville covers 40.7 square miles of land and counts 54,237 housing units, about 1,331 per square mile.
46% of Lewisville's occupied homes are owner-occupied, and the median owner-occupied home is valued at $378,500; 43% of all homes in the city date from 2000 or later.
The largest soil series under Lewisville is Ovan, on 9% of the mapped land, followed by Wilson at 6%.
USDA's soil survey maps 30,073 acres inside Lewisville's city limits.
Drought in Denton County
39.7% of Denton County is in drought (D1 or worse) on the November 3, 2026 map. County detail.
Flood losses by ZIP code
FEMA flood records since 2016 in the ZIP codes that overlap Lewisville. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 75057 | 35% | 2 | $5,373 |
| 75067 | 34% | 4 | $42,819 |
| 75056 | 19% | 8 | $695,457 |
| 75077 | 11% | 11 | $378,597 |
Homes in Lewisville
| Housing units | 54,237 |
| Median year built | 1997 |
| Built before 1980 | 14% |
| Built 2000 or later | 43% |
| Owner-occupied | 46% |
| Median value, owner-occupied | $378,500 |
| Single-family detached | 46% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| The Colony | 5 mi | 68% | 0% |
| Hebron | 5 mi | 66% | 0% |
| Hickory Creek | 5 mi | 18% | 5% |
| Lakewood Village | 6 mi | 77% | 0% |
| Highland Village | 6 mi | 9% | under 1% |
| Carrollton | 6 mi | 65% | 8% |
| Lake Dallas | 6 mi | 18% | 1% |
| Coppell | 6 mi | 58% | 11% |
Sources: USDA SSURGO (August 5, 2026) · US Drought Monitor (November 3, 2026) · FEMA NFIP v3 (September 9, 2026) · Census ACS 2020-2024. Methods · Data status