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Seven Oaks, Texas
Inside Seven Oaks' city limits, shrink-swell clay limits houses without basements on 8% of mapped land, the 4th-highest of 5 cities in Polk County. A shallow water table limits basements on 83%, the highest of 5 cities in Polk County.
That clay share is below Polk County's 23%. FEMA's flood data list 84 flood losses since 2016 in ZIP code 77351 overlapping the city.
Data as of October 13, 2026 · sources · in Polk County
expansive clay: shrink-swell limits slab homes
high water table: limits basements
flood losses since 2016 in 1 overlapping ZIP
Foundation repair in Seven Oaks
Foundation repair in Seven Oaks: shrink-swell clay limits slab homes on 8% of Seven Oaks' mapped land.
| 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 Seven Oaks city limits
| Expansive clay (limits slab homes) | 8.4% |
| High water table (limits basements) | 82.8% |
| Septic fields very limited | 94.1% |
| Clay swell (LEP, by area) | 4.3% |
| High-swell land (LEP 6%+) | 8.4% |
| Mapped soil | 895 acres |
| Soil series | Share here | Series nationally: expansive clay |
|---|---|---|
| Leggett | 59% | n/a |
| Hatliff | 10% | n/a |
| Kian | 10% | n/a |
| Pluck | 9% | n/a |
| Woodville | 5% | n/a |
| Kaman | 2% | n/a |
What the numbers mean here
On 83% of Seven Oaks' mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
USDA rates 94% of the land very limited for septic absorption fields.
Drought in Polk County
2.1% of Polk 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 Seven Oaks. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 77351 | 93% | 84 | $2.4 million |
Homes
Seven Oaks has fewer than 100 housing units in the ACS 2020-2024 estimates, too few for reliable shares.
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Corrigan | 10 mi | under 1% | 72% |
| Livingston | 11 mi | 55% | 44% |
| Onalaska | 15 mi | 15% | 46% |
| Chester | 16 mi | 42% | 30% |
| Goodrich | 18 mi | 71% | 54% |
| Groveton | 21 mi | 0% | 87% |
| Point Blank | 22 mi | 63% | 67% |
| Diboll | 24 mi | 11% | 63% |
Sources: USDA SSURGO (August 5, 2026) · US Drought Monitor (October 13, 2026) · FEMA NFIP v3 (September 9, 2026). Methods · Data status