HomeTexasDenton CountyFlower Mound
Flower Mound, Texas
Inside Flower Mound's city limits, shrink-swell clay limits houses without basements on 29% of mapped land. A shallow water table limits basements on 1%.
That clay share is below Denton County's 50%. FEMA's flood data list 10 flood losses since 2016 in the 2 ZIP codes overlapping the city. Of its 28,789 homes, 5% were built before 1980; the median dates from 1997.
Data as of October 13, 2026 · sources · in Denton County
expansive clay: shrink-swell limits slab homes
high water table: limits basements
flood losses since 2016 in 2 overlapping ZIPs
of homes built before 1980
Foundation repair in Flower Mound
Foundation repair in Flower Mound: shrink-swell clay limits slab homes on 29% of Flower Mound's mapped land.
The city requires a permit for the work.
About 24,700 of Flower Mound's 28,789 homes are detached houses.
| City permit | Required. Flower Mound says a homeowner must get a permit from Building Inspections to have a foundation repaired. (Town of Flower Mound, Texas, read October 2, 2026) |
| Engineer | Flower Mound says foundation repair work must be designed by a State-licensed engineer. (Town of Flower Mound, Texas) |
| Prices | Cost guide ranges compared |
Soil under Flower Mound city limits
| Expansive clay (limits slab homes) | 29.0% |
| High water table (limits basements) | 1.3% |
| Septic fields very limited | 67.9% |
| Clay swell (LEP, by area) | 5.4% |
| High-swell land (LEP 6%+) | 30.9% |
| Mapped soil | 28,585 acres |
What the numbers mean here
Clay swell averages a linear extensibility of 5.4% by land area here, and 31% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 29% of the mapped land.
Clay shrinks as it dries: 100% of Denton County is in drought on the latest map, and 29% of Flower Mound's mapped land has shrink-swell clay.
USDA rates 68% of the land very limited for septic absorption fields.
Drought in Denton County
100% of Denton 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 Flower Mound. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 75022 | 44% | 5 | $80,757 |
| 75028 | 37% | 5 | $283,201 |
Homes in Flower Mound
| Housing units | 28,789 |
| Median year built | 1997 |
| Built before 1980 | 5% |
| Built 2000 or later | 39% |
| Owner-occupied | 83% |
| Median value, owner-occupied | $560,200 |
| Single-family detached | 86% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Double Oak | 2 mi | 2% | 1% |
| Bartonville | 4 mi | 4% | 2% |
| Copper Canyon | 4 mi | 2% | 2% |
| Trophy Club | 5 mi | 39% | 5% |
| Highland Village | 5 mi | 9% | under 1% |
| Argyle | 6 mi | 21% | 1% |
| Southlake | 6 mi | 36% | 17% |
| Westlake | 6 mi | 40% | 9% |
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