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Boerne, Texas
Inside Boerne's city limits, shrink-swell clay limits houses without basements on 43% of mapped land, higher than 51% of Texas cities. A shallow water table limits basements on 0%.
That clay share is above Kendall County's 23%. FEMA's flood data list 26 flood losses since 2016 in ZIP code 78006 overlapping the city. Of its 8,240 homes, 15% were built before 1980; the median dates from 2006.
Data as of October 13, 2026 · sources · in Kendall 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 Boerne
Foundation repair in Boerne: shrink-swell clay limits slab homes on 43% of Boerne's mapped land, more than in 51% of Texas cities.
About 5,900 of Boerne's 8,240 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 Boerne city limits
| Expansive clay (limits slab homes) | 42.5% |
| High water table (limits basements) | 0.0% |
| Septic fields very limited | 85.0% |
| Clay swell (LEP, by area) | 6.5% |
| High-swell land (LEP 6%+) | 42.5% |
| Mapped soil | 7,721 acres |
| Soil series | Share here | Series nationally: expansive clay |
|---|---|---|
| Denton | 20% | n/a |
| Doss | 16% | n/a |
| Brackett | 13% | 0% |
| Krum | 11% | n/a |
| Oakalla | 11% | n/a |
| Anhalt | 9% | n/a |
What the numbers mean here
Clay swell averages a linear extensibility of 6.5% by land area here, and 43% of the land reaches USDA's high class (6% or more). Clay like that swells when wet and shrinks when dry, under 43% of the mapped land.
USDA rates 85% of the land very limited for septic absorption fields.
Drought in Kendall County
0% of Kendall 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 Boerne. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 78006 | 96% | 26 | $703,877 |
Homes in Boerne
| Housing units | 8,240 |
| Median year built | 2006 |
| Built before 1980 | 15% |
| Built 2000 or later | 68% |
| Owner-occupied | 65% |
| Median value, owner-occupied | $457,900 |
| Single-family detached | 72% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Fair Oaks Ranch | 6 mi | 46% | under 1% |
| Grey Forest | 12 mi | 56% | 0% |
| Helotes | 15 mi | 53% | 0% |
| Bulverde | 17 mi | 13% | 0% |
| Shavano Park | 17 mi | 54% | under 1% |
| Hollywood Park | 19 mi | 52% | 0% |
| Spring Branch | 20 mi | 18% | 0% |
| Hill Country Village | 20 mi | 71% | 0% |
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