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Longview, Texas
Inside Longview's city limits, shrink-swell clay limits houses without basements on 1% of mapped land. A shallow water table limits basements on 30%.
That clay share is below Gregg County's 9%. FEMA's flood data list 37 flood losses since 2016 in the 4 ZIP codes overlapping the city. Of its 36,746 homes, 55% were built before 1980; the median dates from 1978.
Data as of October 13, 2026 · sources · in Gregg 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 Longview
Foundation repair in Longview: shrink-swell clay limits slab homes on 1% of Longview's mapped land.
About 22,700 of Longview's 36,746 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 Longview city limits
| Expansive clay (limits slab homes) | 1.0% |
| High water table (limits basements) | 29.8% |
| Septic fields very limited | 85.2% |
| Clay swell (LEP, by area) | 2.7% |
| High-swell land (LEP 6%+) | 4.6% |
| Urban land, not rated | 10.5% |
| Mapped soil | 36,050 acres |
What the numbers mean here
On 30% of Longview's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
USDA rates 85% of the land very limited for septic absorption fields.
Drought in Gregg County
100% of Gregg 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 Longview. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 75604 | 36% | 6 | $331,183 |
| 75605 | 28% | 15 | $581,104 |
| 75602 | 18% | 7 | $67,233 |
| 75601 | 16% | 9 | $434,815 |
Homes in Longview
| Housing units | 36,746 |
| Median year built | 1978 |
| Built before 1980 | 55% |
| Built 2000 or later | 21% |
| Owner-occupied | 55% |
| Median value, owner-occupied | $202,600 |
| Single-family detached | 62% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| White Oak | 5 mi | under 1% | 40% |
| East Mountain | 7 mi | 0% | 34% |
| Clarksville City | 8 mi | 9% | 44% |
| Lakeport | 9 mi | 7% | 38% |
| Warren City | 9 mi | 0% | 35% |
| Union Grove | 10 mi | 1% | 31% |
| Kilgore | 10 mi | 3% | 37% |
| Gladewater | 11 mi | 2% | 32% |
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