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Lebanon, Ohio
Inside Lebanon's city limits, a shallow water table limits basements on 27% of mapped land. Shrink-swell clay limits houses without basements on 16%, the highest of 13 cities in Warren County.
That water-table share is below Warren County's 51%. FEMA's flood data list 14 flood losses since 2016 in ZIP code 45036 overlapping the city. Of its 8,647 homes, 46% were built before 1980; the median dates from 1986.
Data as of October 13, 2026 · sources · in Warren 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
Basement waterproofing in Lebanon
Basement waterproofing in Lebanon: a shallow water table limits basements on 27% of Lebanon's mapped land, and the ZIP code overlapping Lebanon logged 14 FEMA flood losses since 2016.
In Warren County, 42% of the 24 flood-loss buildings with a recorded foundation type had basements.
About 5,200 of Lebanon's 8,647 homes are detached houses.
Soil under Lebanon city limits
| Expansive clay (limits slab homes) | 16.0% |
| High water table (limits basements) | 27.3% |
| Septic fields very limited | 75.8% |
| Clay swell (LEP, by area) | 4.6% |
| High-swell land (LEP 6%+) | 14.3% |
| Urban land, not rated | 19.6% |
| Mapped soil | 8,629 acres |
What the numbers mean here
Clay swell averages a linear extensibility of 4.6% 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 16% of the mapped land.
On 27% of Lebanon's mapped land, soil stays saturated within about 6 feet of the surface for part of the year, which is basement depth.
USDA rates 76% of the land very limited for septic absorption fields.
Drought in Warren County
0% of Warren 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 Lebanon. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 45036 | 97% | 14 | $444,535 |
Homes in Lebanon
| Housing units | 8,647 |
| Median year built | 1986 |
| Built before 1980 | 46% |
| Built 2000 or later | 29% |
| Owner-occupied | 61% |
| Median value, owner-occupied | $290,200 |
| Single-family detached | 60% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| South Lebanon | 4 mi | 9% | 25% |
| Mason | 6 mi | 4% | 41% |
| Morrow | 7 mi | 11% | 16% |
| Maineville | 7 mi | 3% | 77% |
| Monroe | 8 mi | 27% | 41% |
| Springboro | 10 mi | 8% | 28% |
| Middletown | 10 mi | 3% | 14% |
| Waynesville | 10 mi | 4% | 20% |
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