Off-grid site report

Isabella County, MI

43.5239, -84.7870 · 824 ft elevation
Read this before you act on anything below. This is my researched starting point for Isabella 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 rulesIsabella County, MI

Zoning & raw-land occupancy
Varies locallyIsabella County has countywide zoning for unincorporated areas under the Michigan Zoning Enabling Act, but any township or city with its own adopted zoning ordinance governs itself instead. Confirm which authority applies to your parcel with the County Community Development Department. source
Dwellings, tiny homes & RVs
RestrictedA zoning permit is required for essentially any structure, even temporary or movable ones, per the Isabella County Community Development Department. Whether the ordinance sets minimum dwelling sizes or allows RVs as permanent residences is not confirmed and should be checked directly with staff. source
Building permits & codes
RestrictedIsabella County requires a building permit for all new dwellings and any construction that changes the structure on your property, with applications requiring tax ID, legal description, septic approval where applicable, and a plot plan. A soil erosion permit may also be required near water or when disturbing more than an acre. source
Septic & composting toilets
RestrictedSeptic and sewage system permits are issued and inspected by the Central Michigan District Health Department, which also enforces a Time of Transfer evaluation rule for properties with onsite wells or septic systems. Composting toilet policy specifically was not confirmed in CMDHD materials reviewed.
Greywater reuse
Generally allowedMichigan state law allows acceptable alternative greywater systems for non-blackwater wastewater, administered through the local health department, but no Isabella-County-specific greywater guidance was found, so county-level specifics are not confirmed. source
Rainwater harvesting
Generally allowedNo Isabella County or CMDHD restriction on rainwater harvesting was found, so it appears to default to the state baseline, though this is not confirmed at the county level.
Private wells & water rights
RestrictedPrivate wells require a permit and inspection through the Central Michigan District Health Department under state and local Sanitary Code requirements, while the state agency EGLE handles larger-scale contamination oversight and industry regulation.
Living disconnected from utilities
Unclear - verifyNo explicit county ordinance banning full utility disconnection was found, but building permit paperwork expects septic approval and CMDHD's Time of Transfer rule expects wells and sewage systems to be evaluated, so fully off-grid setups with hauled water or composting toilets likely need case-by-case approval. source

Open the full county page with sources →

Sun30-year normals

Peak-sun hours, annual average
4.3 hrs/day
Worst month (sizes an off-grid array)
2.2 hrs/day
Yearly output per 1 kW of panels
1,258 kWh
JFMAMJJASOND

Weather1991-2020

Precipitation
32 in/yr
Heating degree days
7,330 (cold)
Frost-free season
May 2 to Oct 8

How far help isstraight-line

Hospital
McLaren Central Michigan
5.4 mi
Fire station
Tribal Fire Department
6.8 mi
Hardware store
Menards
3.8 mi
Grocery
Walmart Supercenter
3.6 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 48859).

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.