Off-grid site report

Hardin County, OH

40.6559, -83.5825 · 991 ft elevation
Read this before you act on anything below. This is my researched starting point for Hardin 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 rulesHardin County, OH

Zoning & raw-land occupancy
Varies locallyHardin County, Ohio has no countywide zoning code; zoning is set township-by-township under ORC 519, with the Hardin County Regional Planning Commission reviewing and recommending on township zoning resolutions. Whether raw land can simply be occupied depends entirely on which of the 15 townships (e.g., Cessna, Hale, Liberty) the parcel sits in, so check with that township's zoning officer/trustees. source
Dwellings, tiny homes & RVs
Varies locallyNo countywide standard for tiny homes, RVs, or manufactured homes was confirmed. Township resolutions I reviewed, like Cessna and Hale, specifically regulate mobile/manufactured home parks (referencing Ohio Department of Commerce and Ohio Department of Health standards for sewage hookups), but tiny-home or RV-as-residence rules weren't confirmed for any township, so ask the local township zoning officer. source
Building permits & codes
Unclear - verifyI could not confirm which certified building department covers unincorporated Hardin County townships under the Residential Code of Ohio; no official Hardin County, Ohio building department webpage turned up in my research, so this needs a direct call to the county or relevant township office. source
Septic & composting toilets
Generally allowedThe Kenton-Hardin Health Department administers on-site sewage system permitting countywide under Ohio Administrative Code 3701-29, issuing permits valid for one year. Composting toilets aren't separately addressed, so I'd treat them as falling under this same sewage-system framework unless the health department says otherwise. source
Greywater reuse
Generally allowedNo Hardin County-specific greywater ordinance turned up; greywater appears to fall under the same Kenton-Hardin Health Department sewage-treatment authority (OAC 3701-29) as the state baseline, so I'd expect a permit is needed, but confirm specifics directly with that department. source
Rainwater harvesting
Generally allowedNo distinct Hardin County rainwater-harvesting rule was confirmed; this appears to fall under Ohio's private water systems rules (OAC 3701-28) as administered locally by the Kenton-Hardin Health Department, following the state baseline.
Private wells & water rights
Generally allowedThe Kenton-Hardin Health Department handles well permitting countywide alongside septic, under the private water system rules in Ohio Administrative Code 3701-28/3701-29. Applications go through that same Kenton office. source
Living disconnected from utilities
Unclear - verifyI found no Hardin County or township ordinance requiring hookup to electric, water, or sewer utilities. That said, an occupied dwelling would still need to meet applicable building code and health department (septic/well) requirements even while off-grid, so confirm with the township and the Kenton-Hardin Health Department that nothing local overrides this.

Open the full county page with sources →

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
1,302 kWh
JFMAMJJASOND

Weather1991-2020

Precipitation
36 in/yr
Snowfall
26 in/yr
Heating degree days
6,041 (cold)
Frost-free season
Apr 23 to Oct 20

How far help isstraight-line

Hospital
Hardin Memorial Hospital
0.9 mi
Fire station
Kenton Fire Department
1.5 mi
Hardware store
Ace Hardware
0.7 mi
Grocery
Walmart Supercenter
0.1 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 43326).

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.