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Danbury, Texas
Inside Danbury's city limits, shrink-swell clay limits houses without basements on 74% of mapped land, the 4th-highest of 24 cities in Brazoria County. A shallow water table limits basements on 69%, the 4th-highest of 24 cities in Brazoria County.
That clay share is above Brazoria County's 64%. FEMA's flood data list 88 flood losses since 2016 in ZIP code 77534 overlapping the city. Of its 795 homes, 59% were built before 1980; the median dates from 1977.
Data as of October 13, 2026 · sources · in Brazoria 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 Danbury
Foundation repair in Danbury: shrink-swell clay limits slab homes on 74% of Danbury's mapped land, more than in 78% of Texas cities.
About 700 of Danbury's 795 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 Danbury city limits
| Expansive clay (limits slab homes) | 74.3% |
| High water table (limits basements) | 69.4% |
| Septic fields very limited | 85.5% |
| Clay swell (LEP, by area) | 8.2% |
| High-swell land (LEP 6%+) | 74.3% |
| Mapped soil | 621 acres |
| Soil series | Share here | Series nationally: expansive clay |
|---|---|---|
| Bernard | 37% | 43% |
| Lake Charles | 29% | 97% |
| Edna | 25% | n/a |
| Verland | 4% | n/a |
| Telferner | 2% | n/a |
| Cieno | 1% | n/a |
What the numbers mean here
Clay swell averages a linear extensibility of 8.2% by land area here, and 74% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 74% of the mapped land.
Clay shrinks as it dries: 100% of Brazoria County is in drought on the latest map, and 74% of Danbury's mapped land has shrink-swell clay.
On 69% of Danbury'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 Brazoria County
100% of Brazoria 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 Danbury. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 77534 | 100% | 88 | $5.3 million |
Homes in Danbury
| Housing units | 795 |
| Median year built | 1977 |
| Built before 1980 | 59% |
| Built 2000 or later | 20% |
| Owner-occupied | 78% |
| Median value, owner-occupied | $233,400 |
| Single-family detached | 91% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Angleton | 6 mi | 64% | 65% |
| Liverpool | 7 mi | 84% | 33% |
| Bonney | 9 mi | 74% | 21% |
| Holiday Lakes | 10 mi | 38% | 2% |
| Bailey's Prairie | 11 mi | 57% | 13% |
| Richwood | 12 mi | 78% | 6% |
| Hillcrest Village | 14 mi | 48% | 78% |
| Lake Jackson | 14 mi | 67% | 15% |
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