Off-grid site report

Miami County, OH

39.9417, -84.0674 · 853 ft elevation

Read this before you act on anything below. This is my researched starting point for Miami 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 rulesMiami County, OH

Zoning & raw-land occupancy

Varies locallyMiami County Dept. of Development handles zoning for 8 of 12 townships; Bethel, Brown, Elizabeth, and Lostcreek townships self-administer zoning, and incorporated cities/villages like Troy, Piqua, and Tipp City run their own separate zoning and building departments. Confirm which authority governs your specific parcel first. source

Dwellings, tiny homes & RVs

Unclear - verifyNo county page specifically addresses tiny home minimum sizes, RV-as-dwelling rules, or manufactured home siting; Ohio's statewide manufactured-home baseline likely applies but local add-ons aren't confirmed. Ask the Department of Development or your township, and check for private deed restrictions too. source

Building permits & codes

Generally allowedBuilding permits are required in unincorporated areas under county jurisdiction, enforced by Miami County Building Regulations using the statewide Residential Code of Ohio and Ohio Building Code, with local submittal requirements set by the county. source

Septic & composting toilets

Generally allowedSeptic (household sewage treatment) systems are permitted through Miami County Public Health, which also runs the state-mandated Operation & Maintenance monitoring program under Ohio Administrative Code 3701-29-09(I). Composting toilets aren't separately addressed, so confirm treatment under this same framework with Environmental Health. source

Greywater reuse

Unclear - verifyNo Miami County-specific greywater page was found; this would presumably fall under the state OAC 3701-29 framework administered locally, but the exact local procedure is not confirmed. Contact Miami County Public Health Environmental Health directly.

Rainwater harvesting

Unclear - verifyNo Miami County-specific page on rainwater harvesting or cisterns was found. The statewide OAC 3701-28 private water systems framework likely applies, administered locally by the health district, but specifics are not confirmed.

Private wells & water rights

Generally allowedPrivate wells are permitted with a permit from Miami County Public Health's Environmental Health division, consistent with the statewide ODH framework. A small set of townships (Bethel, Concord, Monroe, Springcreek) may instead be served by county Sanitary Engineering's water system. source

Living disconnected from utilities

Unclear - verifyNo ordinance was found either mandating or explicitly permitting full utility disconnection in Miami County. Outside the limited county sanitary sewer service townships, private well and septic are simply the default arrangement, and building code plus health permitting still apply.

Open the full county page with sources →

Sun30-year normals

Peak-sun hours, annual average: 4.6 hrs/day
Worst month (sizes an off-grid array): 2.7 hrs/day
Yearly output per 1 kW of panels: 1,322 kWh

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Weather1991-2020

Precipitation: 41 in/yr
Snowfall: 23 in/yr
Heating degree days: 5,645 (cold)
Frost-free season: Apr 19 to Oct 22

How far help isstraight-line

Hospital Wright-Patterson Medical Center: 9.6 mi
Fire station Fire Station #2: 7.1 mi
Hardware store Lowe's: 5.9 mi
Grocery Kroger: 6.5 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 45344).

Size a solar system Heat loss & insulation Firewood per winter Rainwater harvest Garden size Panel tilt

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.