Off-grid site report
Gallia County, OH
38.9765, -82.3415Read this before you act on anything below. This is my researched starting point for Gallia County, OH, not legal advice and not a guarantee. Rules change, and the deciding facts on any specific parcel (setbacks, perc results, overlay districts, deed restrictions, road frontage) live at the county or town office, not in any database. Before you buy land or build, confirm the current rules directly with the local zoning and health offices - the sources on this page tell you exactly who to call.
The local rulesGallia County, OH
Zoning & raw-land occupancy
Varies locallyThe Gallia County Planning Department confirms there is no county zoning or building permitting in unincorporated areas, but floodplain, subdivision, and access-management regulations still apply; villages and the City of Gallipolis zone separately. source
Dwellings, tiny homes & RVs
Unclear - verifyNo official Gallia County document addresses tiny home or RV occupancy specifically; not confirmed at the county level. Check with the relevant Village or City of Gallipolis if inside municipal limits.
Building permits & codes
Varies locallyNo building permits are required in unincorporated Gallia County per the Planning Department, aside from a Building Notice for projects over a cost threshold; the City of Gallipolis runs its own Construction and Zoning Department requiring permits within city limits. source
Septic & composting toilets
Generally allowedThe Gallia County Board of Health enforces Ohio Administrative Code 3701-29 and requires a Permit to Install for household sewage systems, including composting alternatives, before excavation. source
Greywater reuse
Generally allowedNo Gallia-specific greywater page was found; the county Health Department enforces the same statewide OAC 3701-29 sewage framework under which greywater systems are regulated, so a local permit would likely apply, though this isn't separately confirmed. source
Rainwater harvesting
Generally allowedNo Gallia County document specifically restricts rainwater cisterns; the county Health Department's private water system authority covers cisterns as a category under the state framework, but a distinct county rainwater policy was not confirmed. source
Private wells & water rights
Generally allowedThe Gallia County Board of Health enforces OAC 3701-28 for wells, springs, cisterns, ponds, and hauled water tanks serving fewer than fifteen connections, and requires an application/permit through the county Health Department before installation. source
Living disconnected from utilities
Unclear - verifyNo official Gallia County document requires connection to electric, water, or sewer utilities; the absence of unincorporated zoning/building permitting suggests no county enforcement mechanism, but this was not explicitly confirmed. Village/City rules like Gallipolis's may differ.
Sun30-year normals
- Peak-sun hours, annual average
- 4.5 hrs/day
- Worst month (sizes an off-grid array)
- 2.6 hrs/day
- Yearly output per 1 kW of panels
- 1,242 kWh
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Weather1991-2020
- Precipitation
- 41 in/yr
- Snowfall
- 18 in/yr
- Heating degree days
- 5,278 (moderate)
- Frost-free season
- Apr 28 to Oct 11
How far help isstraight-line
- Hospital
Holzer Medical Center - 10.6 mi
- Fire station
Wilkesville Joint Volunteer Fire Department - 6.9 mi
- Hardware store
Jerry's Do it Center - 13.3 mi
- Grocery
Piggly Wiggly - 10.4 mi
From OpenStreetMap. Road miles will be longer, often much longer in hill country.
Plan this spot
These open with this location's real numbers already filled in (ZIP 45686).
Size a solar systemHeat loss & insulationFirewood per winterRainwater harvestGarden sizePanel tilt
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Sources: US Census Bureau geocoder; NLR PVWatts v8 (solar); NOAA NCEI 1991-2020 climate normals (nearest station) or Open-Meteo (ZIP-centroid) for weather; Open-Elevation; OpenStreetMap contributors. Public data retrieved Aug 22, 2026; agencies update their layers on their own schedules. Planning data, not a survey or legal advice.