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Frisco, Texas
Inside Frisco's city limits, shrink-swell clay limits houses without basements on 76% of mapped land, higher than 80% of Texas cities. A shallow water table limits basements on under 1%.
That clay share is close to Collin County's 72%. FEMA's flood data list 16 flood losses since 2016 in the 4 ZIP codes overlapping the city. Of its 80,353 homes, 2% were built before 1980; the median dates from 2009.
Data as of November 3, 2026 · sources · in Collin 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 Frisco
Foundation repair in Frisco: shrink-swell clay limits slab homes on 76% of Frisco's mapped land, more than in 80% of Texas cities.
The city lists a permit for the work.
About 55,700 of Frisco's 80,353 homes are detached houses.
| City permit | Frisco takes foundation repair through its online residential building permit application. (City of Frisco, Building Inspections, read October 2, 2026) |
| Engineer | The application needs a stamped engineer letter and stamped pier drawings, and the engineer files an inspection report when the work is done. (City of Frisco, Building Inspections) |
| Contractor registration | Contractors must be registered with the city before most permits can be submitted. (City of Frisco, Building Inspections) |
| Prices | Cost guide ranges compared |
Soil under Frisco city limits
| Expansive clay (limits slab homes) | 75.6% |
| High water table (limits basements) | 0.1% |
| Septic fields very limited | 85.7% |
| Clay swell (LEP, by area) | 10.6% |
| High-swell land (LEP 6%+) | 64.7% |
| Mapped soil | 44,258 acres |
| Soil series | Share here | Series nationally: expansive clay |
|---|---|---|
| Houston Black | 34% | 91% |
| Heiden | 18% | 80% |
| Branyon | 12% | 92% |
| Austin | 12% | 93% |
| Stephen | 7% | n/a |
| Eddy | 4% | 0% |
What the numbers mean here
Clay swell averages a linear extensibility of 10.6% by land area here, and 65% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 76% of the mapped land.
Clay shrinks as it dries: 100% of Collin County is in drought on the latest map, and 76% of Frisco's mapped land has shrink-swell clay.
USDA rates 86% of the land very limited for septic absorption fields.
Frisco covers 68.6 square miles of land and counts 80,353 housing units, about 1,171 per square mile.
66% of Frisco's occupied homes are owner-occupied, and the median owner-occupied home is valued at $642,100; 82% of all homes in the city date from 2000 or later.
The largest soil series under Frisco is Houston Black, on 34% of the mapped land, followed by Heiden at 18%.
USDA's soil survey maps 44,258 acres inside Frisco's city limits.
Drought in Collin County
100% of Collin 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 Frisco. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 75035 | 35% | 1 | $3,880 |
| 75033 | 31% | 5 | $15,505 |
| 75034 | 23% | 7 | $418,206 |
| 75036 | 9% | 3 | $186,128 |
Homes in Frisco
| Housing units | 80,353 |
| Median year built | 2009 |
| Built before 1980 | 2% |
| Built 2000 or later | 82% |
| Owner-occupied | 66% |
| Median value, owner-occupied | $642,100 |
| Single-family detached | 69% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Hackberry | 6 mi | 84% | 0% |
| Prosper | 6 mi | 77% | under 1% |
| Little Elm | 6 mi | 52% | 1% |
| The Colony | 7 mi | 68% | 0% |
| Hebron | 8 mi | 66% | 0% |
| Plano | 8 mi | 75% | under 1% |
| Lakewood Village | 9 mi | 77% | 0% |
| Allen | 9 mi | 78% | under 1% |
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