Off-Grid Living in Wayne County, Illinois

I'll be straight with you: Wayne County, Illinois is one of the harder places I've researched, because the county itself just doesn't seem to have a public-facing zoning or building department. No ordinance, no Municode listing, nothing I could confirm officially. That's actually common in rural southern Illinois, where a lot of counties never opted into countywide zoning under the state's Zoning Enabling Act, but I can't say for certain that's the case here, only that I couldn't find evidence of a county zoning office or code.

Zoning and land use. For unincorporated Wayne County land, I found no official zoning ordinance or planning department page. That could mean there isn't one, or it could mean it just isn't online. Either way, before you buy or build, call the Wayne County Clerk's office or County Board out of the courthouse in Fairfield and ask directly whether any zoning applies to your parcel.

Dwellings, tiny homes, RVs. Inside the City of Fairfield (the county seat), the municipal zoning FAQ is clear: RVs, campers, converted buses, and similar can't be used as permanent housing, and are capped at 14 days of temporary living per year within city limits. That's a Fairfield rule, not a county one. For unincorporated land outside Fairfield, I found no equivalent restriction, but that doesn't mean none exists, it means it wasn't published anywhere I could find.

Building permits. Fairfield requires a permit for most new construction, additions, and demolition inside city limits. Illinois adopted its first statewide building code effective January 1, 2025, but how (or whether) Wayne County enforces that on unincorporated land isn't confirmed from what I found.

Septic and wells: this is where the county actually shows up. The Wayne County Health Department runs a real environmental health program. It reviews and approves septic plans before construction under the state's Private Sewage Disposal Code, and issues an operating permit once a new system passes inspection. Same story for wells: the health department issues permits, inspects wells, and enforces the state's Water Well Code and Pump Installation Code locally. This is the one part of off-grid living here with a clear, working permit process, and the health department is your best point of contact for questions on composting toilets too, since there's no county-specific page on those.

Greywater and rainwater harvesting. I found nothing official from the county or state addressing either directly. Ask the health department's environmental staff when you're going through septic plan review, since greywater handling will likely come up there anyway.

Utility disconnection. No ordinance found addressing off-grid electric or water service directly, except the indirect effect of Fairfield's RV occupancy rule inside city limits.

Bottom line: septic and well rules are solid and county-run. Zoning, building, and RV/dwelling rules for unincorporated land are genuinely unclear from public records, so a phone call to the courthouse is worth your time before you commit to a piece of land.