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Hallsville, Texas
Inside Hallsville's city limits, shrink-swell clay limits houses without basements on 26% of mapped land, the 3rd-highest of 5 cities in Harrison County. A shallow water table limits basements on 71%, the 3rd-highest of 5 cities in Harrison County.
That clay share is close to Harrison County's 24%. FEMA's flood data list no flood losses since 2016 in ZIP code 75650 overlapping the city. Of its 1,836 homes, 45% were built before 1980; the median dates from 1985.
Data as of October 13, 2026 · sources · in Harrison 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 Hallsville
Foundation repair in Hallsville: shrink-swell clay limits slab homes on 26% of Hallsville's mapped land.
About 1,400 of Hallsville's 1,836 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 Hallsville city limits
| Expansive clay (limits slab homes) | 26.2% |
| High water table (limits basements) | 70.5% |
| Septic fields very limited | 90.6% |
| Clay swell (LEP, by area) | 3.9% |
| High-swell land (LEP 6%+) | 14.2% |
| Mapped soil | 2,557 acres |
What the numbers mean here
Clay swell averages a linear extensibility of 3.9% by land area here, and 14% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 26% of the mapped land.
Clay shrinks as it dries: 100% of Harrison County is in drought on the latest map, and 26% of Hallsville's mapped land has shrink-swell clay.
On 71% of Hallsville's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
USDA rates 91% of the land very limited for septic absorption fields.
Drought in Harrison County
100% of Harrison 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 Hallsville. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 75650 | 100% | 0 | $0 |
Homes in Hallsville
| Housing units | 1,836 |
| Median year built | 1985 |
| Built before 1980 | 45% |
| Built 2000 or later | 30% |
| Owner-occupied | 61% |
| Median value, owner-occupied | $229,800 |
| Single-family detached | 78% |
Nearby cities
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