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Marquez, Texas
Inside Marquez's city limits, shrink-swell clay limits houses without basements on 49% of mapped land, the 2nd-highest of 7 cities in Leon County. A shallow water table limits basements on 16%, the 2nd-highest of 7 cities in Leon County.
That clay share is above Leon County's 16%. FEMA's flood data list no flood losses since 2016 in ZIP code 77865 overlapping the city. Of its 122 homes, 78% were built before 1980; the median dates from 1973.
Data as of October 13, 2026 · sources · in Leon 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 Marquez
Foundation repair in Marquez: shrink-swell clay limits slab homes on 49% of Marquez's mapped land, more than in 57% of Texas cities.
About 100 of Marquez's 122 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 Marquez city limits
| Expansive clay (limits slab homes) | 49.5% |
| High water table (limits basements) | 15.9% |
| Septic fields very limited | 64.0% |
| Clay swell (LEP, by area) | 7.2% |
| High-swell land (LEP 6%+) | 63.7% |
| Mapped soil | 835 acres |
What the numbers mean here
Clay swell averages a linear extensibility of 7.2% by land area here, and 64% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 49% of the mapped land.
Clay shrinks as it dries: 100% of Leon County is in drought on the latest map, and 49% of Marquez's mapped land has shrink-swell clay.
On 16% of Marquez's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
USDA rates 64% of the land very limited for septic absorption fields.
Drought in Leon County
100% of Leon 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 Marquez. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 77865 | 100% | 0 | $0 |
Homes in Marquez
| Housing units | 122 |
| Median year built | 1973 |
| Built before 1980 | 78% |
| Built 2000 or later | 7% |
| Owner-occupied | 86% |
| Single-family detached | 73% |
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