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Union Valley, Texas
Inside Union Valley's city limits, shrink-swell clay limits houses without basements on 77% of mapped land, higher than 82% of Texas cities. A shallow water table limits basements on 35%, the 4th-highest of 13 cities in Hunt County.
That clay share is close to Hunt County's 78%. FEMA's flood data list 7 flood losses since 2016 in the 2 ZIP codes overlapping the city. Of its 294 homes, 9% were built before 1980; the median dates from 2007.
Data as of October 13, 2026 · sources · in Hunt 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 Union Valley
Foundation repair in Union Valley: shrink-swell clay limits slab homes on 77% of Union Valley's mapped land, more than in 82% of Texas cities.
About 200 of Union Valley's 294 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 Union Valley city limits
| Expansive clay (limits slab homes) | 77.1% |
| High water table (limits basements) | 34.8% |
| Septic fields very limited | 87.7% |
| Clay swell (LEP, by area) | 8.7% |
| High-swell land (LEP 6%+) | 77.1% |
| Mapped soil | 1,713 acres |
What the numbers mean here
Clay swell averages a linear extensibility of 8.7% by land area here, and 77% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 77% of the mapped land.
Clay shrinks as it dries: 100% of Hunt County is in drought on the latest map, and 77% of Union Valley's mapped land has shrink-swell clay.
On 35% of Union Valley's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
USDA rates 88% of the land very limited for septic absorption fields.
Drought in Hunt County
100% of Hunt 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 Union Valley. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 75189 | 89% | 5 | $719,332 |
| 75474 | 11% | 2 | $39,397 |
Homes in Union Valley
| Housing units | 294 |
| Median year built | 2007 |
| Built before 1980 | 9% |
| Built 2000 or later | 68% |
| Owner-occupied | 97% |
| Median value, owner-occupied | $325,900 |
| Single-family detached | 75% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Royse City | 5 mi | 87% | 4% |
| Poetry | 6 mi | 76% | 24% |
| Quinlan | 7 mi | 86% | 39% |
| Caddo Mills | 7 mi | 88% | 29% |
| Fate | 8 mi | 81% | under 1% |
| Josephine | 9 mi | 84% | under 1% |
| Nevada | 10 mi | 82% | 0% |
| Mobile City | 10 mi | 82% | 0% |
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