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South Lebanon, Ohio
Inside South Lebanon's city limits, a shallow water table limits basements on 25% of mapped land. Shrink-swell clay limits houses without basements on 9%, the 3rd-highest of 13 cities in Warren County.
That water-table share is below Warren County's 51%. FEMA's flood data list 17 flood losses since 2016 in the 3 ZIP codes overlapping the city. Of its 2,367 homes, 32% were built before 1980; the median dates from 2007.
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 3 overlapping ZIPs
of homes built before 1980
Basement waterproofing in South Lebanon
Basement waterproofing in South Lebanon: a shallow water table limits basements on 25% of South Lebanon's mapped land, and the 3 ZIP codes overlapping South Lebanon logged 17 FEMA flood losses since 2016.
In Warren County, 42% of the 24 flood-loss buildings with a recorded foundation type had basements.
About 1,700 of South Lebanon's 2,367 homes are detached houses.
Soil under South Lebanon city limits
| Expansive clay (limits slab homes) | 9.2% |
| High water table (limits basements) | 24.9% |
| Septic fields very limited | 69.3% |
| Clay swell (LEP, by area) | 3.9% |
| High-swell land (LEP 6%+) | 12.6% |
| Urban land, not rated | 18.4% |
| Mapped soil | 2,490 acres |
What the numbers mean here
On 25% of South 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 69% 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 South Lebanon. ZIP areas reach past city limits.
| ZIP | Share of city land | Flood losses | Paid |
|---|---|---|---|
| 45065 | 70% | 3 | $68,551 |
| 45036 | 17% | 14 | $444,535 |
| 45039 | 12% | 0 | $0 |
Homes in South Lebanon
| Housing units | 2,367 |
| Median year built | 2007 |
| Built before 1980 | 32% |
| Built 2000 or later | 66% |
| Owner-occupied | 73% |
| Median value, owner-occupied | $319,200 |
| Single-family detached | 73% |
Nearby cities
| Place | Distance | Expansive clay | High water table |
|---|---|---|---|
| Maineville | 4 mi | 3% | 77% |
| Mason | 4 mi | 4% | 41% |
| Lebanon | 4 mi | 16% | 27% |
| Morrow | 5 mi | 11% | 16% |
| Loveland | 7 mi | 9% | 23% |
| Butlerville | 8 mi | 6% | 77% |
| Pleasant Plain | 8 mi | 2% | 100% |
| Monroe | 10 mi | 27% | 41% |
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