Off-grid site report

Ionia County, MI

42.9873, -85.0711 · 728 ft elevation

Read this before you act on anything below. This is my researched starting point for Ionia 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 rulesIonia County, MI

Zoning & raw-land occupancy

Varies locallyMichigan's Zoning Enabling Act puts zoning power in the hands of townships, cities, and villages, not counties, and Ionia County has no unified zoning ordinance. The City of Ionia has its own Planning and Zoning Department, while Ionia Township has confirmed it does not have zoning at all, so you have to check with your specific local jurisdiction. source

Dwellings, tiny homes & RVs

Varies locallyThere's no county-level tiny home or RV occupancy standard. The county enforces the state residential building code, but whether an RV or tiny home can be a legal dwelling, and rules around accessory dwelling units, are set locally, as seen in the City of Ionia's own accessory dwelling unit ordinance. source

Building permits & codes

RestrictedThe Ionia County Building Department enforces the state-adopted codes, including the 2021 Michigan Building Code, 2021 Michigan Plumbing Code, 2021 Michigan Mechanical Code, 2023 National Electrical Code with state amendments, and the 2015 Michigan Residential Code, across most of the county since the City of Ionia transferred enforcement to the county in 2010. The City of Portland is the one confirmed exception, running its own independent building department. source

Septic & composting toilets

RestrictedThe Ionia County Health Department's Environmental Health division permits and inspects all on-site sewage systems, including repairs, with soil and site evaluations required before a permit is issued. Composting toilets as a standalone alternative aren't addressed on any county page I found, so treat that as unconfirmed and ask the Health Department directly. source

Greywater reuse

Unclear - verifyI did not find any Ionia County health or building page that separately addresses greywater reuse outside of standard sewage permitting. It would likely fall under the state Plumbing Code as administered through the county's building permit process, but this isn't confirmed county-specific guidance, so confirm with the County Building Department or Health Department.

Rainwater harvesting

Unclear - verifyNo county ordinance or health department guidance specifically on rainwater harvesting turned up in Ionia County's official sources. Michigan generally allows rainwater collection at the state level, but I'd call this not confirmed at the county level and worth a quick check with the Health Department.

Private wells & water rights

Generally allowedThe Ionia County Health Department issues permits for new and replacement water wells, requiring an application and fee before a site visit, and it also offers water testing for loan evaluations, general consultations, or suspected contamination. source

Living disconnected from utilities

Unclear - verifyNo Ionia County ordinance explicitly permits or bans living fully off the utility grid. But because the Health Department's Environmental Health division ties housing occupancy to its sewage disposal and water supply permitting, a legally habitable home in practice likely needs a county-permitted well and septic system even without a specific off-grid ban on the books. 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): 2.4 hrs/day
Yearly output per 1 kW of panels: 1,257 kWh

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Weather1991-2020

Precipitation: 36 in/yr
Snowfall: 54 in/yr
Heating degree days: 7,069 (cold)
Frost-free season: May 4 to Oct 7

How far help isstraight-line

Hospital University of Michigan Health - Sparrow Ionia: 3.6 mi
Fire station Lyons - Muir Fire Department: 6.3 mi
Hardware store Menards: 3.0 mi
Grocery Ionia City Market: 0.4 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 48846).

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.