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Ladonia, Texas
Inside Ladonia's city limits, shrink-swell clay limits houses without basements on 83% of mapped land, the 4th-highest of 11 cities in Fannin County. A shallow water table limits basements on 18%, the 3rd-highest of 11 cities in Fannin County.
That clay share is above Fannin County's 66%. FEMA's flood data list no flood losses since 2016 in ZIP code 75449 overlapping the city. Of its 317 homes, 73% were built before 1980; the median dates from 1967.
Data as of October 13, 2026 · sources · in Fannin 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 Ladonia
Foundation repair in Ladonia: shrink-swell clay limits slab homes on 83% of Ladonia's mapped land, more than in 89% of Texas cities.
About 300 of Ladonia's 317 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 Ladonia city limits
| Expansive clay (limits slab homes) | 82.7% |
| High water table (limits basements) | 18.3% |
| Septic fields very limited | 83.6% |
| Clay swell (LEP, by area) | 10.0% |
| High-swell land (LEP 6%+) | 82.7% |
| Mapped soil | 1,274 acres |
What the numbers mean here
Clay swell averages a linear extensibility of 10.0% by land area here, and 83% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 83% of the mapped land.
Clay shrinks as it dries: 100% of Fannin County is in drought on the latest map, and 83% of Ladonia's mapped land has shrink-swell clay.
On 18% of Ladonia's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
USDA rates 84% of the land very limited for septic absorption fields.
Drought in Fannin County
100% of Fannin 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 Ladonia. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 75449 | 99% | 0 | $0 |
Homes in Ladonia
| Housing units | 317 |
| Median year built | 1967 |
| Built before 1980 | 73% |
| Built 2000 or later | 10% |
| Owner-occupied | 70% |
| Median value, owner-occupied | $78,300 |
| Single-family detached | 91% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Pecan Gap | 6 mi | 77% | 5% |
| Wolfe City | 8 mi | 68% | 3% |
| Windom | 10 mi | 79% | 0% |
| Honey Grove | 11 mi | 72% | under 1% |
| Bailey | 12 mi | 92% | 0% |
| Dodd City | 13 mi | 66% | 0% |
| Commerce | 13 mi | 73% | 18% |
| Roxton | 15 mi | 84% | 13% |
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