Off-grid site report

Ontonagon County, MI

46.8711, -89.3140 · 614 ft elevation
Read this before you act on anything below. This is my researched starting point for Ontonagon County, MI, 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 rulesOntonagon County, MI

Zoning & raw-land occupancy
Varies locallyOntonagon County has no countywide zoning ordinance, so whether your land is zoned at all depends on which township you're in, or whether you're inside the Village of Ontonagon. Ontonagon Township has its own zoning, and the Village has adopted a zoning ordinance under the state Zoning Enabling Act, but many rural townships may have no zoning at all, so check with the specific township. source
Dwellings, tiny homes & RVs
Varies locallyI found no county-specific rule on tiny homes or RVs as dwellings. This defaults to whatever the local township or village says, layered on top of the state Residential Code enforced by the local building official, so it's worth asking your township directly.
Building permits & codes
RestrictedA local Building Department issues permits and inspects construction, and separate permits are needed for building, electrical, plumbing, and mechanical trades. Where local enforcement isn't available, the State of Michigan Bureau of Construction Codes steps in as backstop. source
Septic & composting toilets
RestrictedSeptic systems, including presumably composting toilet alternatives, fall under the Western Upper Peninsula Health Department's Environmental Health Code, which has jurisdiction across all of Ontonagon County and requires a permit and site evaluation before you can get a local building permit. Composting toilets specifically aren't addressed in what I found, so confirm with WUPHD. source
Greywater reuse
Unclear - verifyI couldn't confirm any Ontonagon County or WUPHD-specific greywater rule, so the state plumbing code baseline likely applies by default. Ask WUPHD directly whether their environmental health code treats greywater separately from septic waste.
Rainwater harvesting
Generally allowedNo county or WUPHD-specific restriction on rainwater harvesting turned up in my research, which lines up with Michigan's generally permissive state-level stance on rainwater collection.
Private wells & water rights
RestrictedPrivate wells go through the Western Upper Peninsula Health Department, which does site evaluations and requires a well permit before you can get your local building permit, consistent with the statewide Water Well Construction Code.
Living disconnected from utilities
Unclear - verifyNo explicit county or township ban on full utility disconnection turned up, but local building permits generally presume an approved water supply and septic system per WUPHD rules, which could functionally limit how 'off-grid' you can be without at least a permitted well and septic. Best to ask WUPHD and your township directly.

Open the full county page with sources →

Sun30-year normals

Peak-sun hours, annual average
4.2 hrs/day
Worst month (sizes an off-grid array)
1.7 hrs/day
Yearly output per 1 kW of panels
1,224 kWh
JFMAMJJASOND

Weather1991-2020

Precipitation
33 in/yr
Snowfall
188 in/yr
Heating degree days
8,302 (severe)
Frost-free season
May 31 to Sep 28

How far help isstraight-line

Hospital
none within range
Fire station
Ontonagon Village Fire Hall
0.1 mi
Hardware store
True Value
0.0 mi
Grocery
Pat's Foods IGA
0.9 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 49953).

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.