Off-Grid Living in Will County, Illinois

I've been digging into what it actually takes to live off-grid in Will County, Illinois, and the first thing I need to flag is this: Will County is not one of those "no zoning" counties you sometimes hear about. It runs countywide zoning for unincorporated land through its Land Use Department, and if your parcel sits inside an incorporated city or village, none of this county-level info applies to you at all, you'd need that town's own code instead.

Zoning. For unincorporated land, the Will County Zoning Ordinance (Chapter 155) puts every parcel into a zoning district, and anything unclassified defaults to the E-1 district. Agricultural districts generally call for multiple acres per dwelling. This isn't a "do whatever you want" county, so I'd start any off-grid plan with a call to Current Planning & Zoning.

Dwellings, tiny homes, RVs. This is genuinely fuzzy. I found language on "live/work dwellings" and manufactured housing standards, but nothing specific on tiny homes or using an RV as a full-time residence. My honest read is this is likely a zoning-level determination that isn't spelled out clearly online, so confirm directly with Land Use before you buy a trailer and a tiny house shell expecting to park it permanently.

Building permits. Required, and Will County has adopted its own set of codes, including NFPA 101 (2015), the Illinois Plumbing Code (2014), and the Illinois Energy Conservation Code (2018). One detail worth knowing: no permit gets issued if the lot doesn't already conform with Illinois property/subdivision law, so an unrecorded or oddly split parcel can stall you before you even get to building questions.

Septic and composting toilets. Straight outhouses and chemical toilets are prohibited outright by county health ordinance. Composting toilets are allowed, but only with specific Health Authority sign-off under the state's private sewage code. Standard septic requires a soil evaluation before any permit, and there's a minimum tank size tied to house size. This is county-administered but leans on the state's Private Sewage Disposal Code.

Greywater and rainwater. I could not find county ordinances addressing either one directly. That's not the same as "banned," it just means the rule isn't written down clearly at the county level, so this is an "ask the Health Department's Environmental Health division" situation.

Wells. Handled well by the Will County Health Department under the statewide well construction code. New wells get inspected and tested for bacteria and nitrates before use, standard stuff for private water systems here.

Full utility disconnection. I couldn't find an explicit county rule that says "yes you can disconnect completely" or "no you can't." My take is it's governed indirectly, through zoning occupancy rules, building habitability code, and the fact that septic and a well become mandatory if you're not tied into municipal systems. Worth a direct call to Building/Land Use to get it in writing for your specific parcel.