Bolthole Index county-legal census · checked 2026-09-09
2 of Illinois's 102 counties — 2% — let an owner build their own home without a licensed contractor. That is the 46th-largest count of any state. The strongest of them on the Bolthole Index is Clinton County (62/100). Every entry below cites the county’s own official source.
Rules change, and cities inside these counties set their own — treat this as a verified starting point, not legal advice. All 1516 counties nationwide → Illinois: no building codes → Illinois: no zoning → Illinois: no codes, no zoning → Illinois: rv living → Illinois: tiny homes → Illinois: no minimum home size → Full Illinois profile →
2 of 102 Illinois counties · sorted by Index score
For private sewage systems the county allows the homeowner to install the system as an exemption to the state-licensed contractor requirement; no explicit building-permit owner-…
Clinton County Health Department - Private Sewage Disposal ↗Rock Island County allows a homeowner to do the work on their own home and to draw their own plans; a permit is still required.
Rock Island County Zoning & Building Safety - Contractor Information ↗Every county here has a full profile — water, land prices, hazard safety, seclusion, and the rest of its building rules. See the Illinois state page for all 102 counties ranked, or go back to the national list.
General guidance, not legal advice. Off-grid, building, and land-use rules are often set at the county level and change often. Verify with your county and state before acting. Data reviewed 2026-06-26.
