Off-grid site report
Fayette County, IL
38.9664, -89.1325 · 525 ft elevationRead this before you act on anything below. This is my researched starting point for Fayette County, IL, 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 rulesFayette County, IL
Zoning & raw-land occupancy
Varies locallyFayette County has a Revised Zoning Ordinance covering unincorporated land, confirmed via a county solar ordinance, but I could not find the full ordinance text online. Confirm district rules with the county directly. source
Dwellings, tiny homes & RVs
Unclear - verifyCounty zoning definitions exclude RVs, travel trailers, and tents from the 'dwelling' definition, but specific tiny-home or RV occupancy rules were not found on an official county page.
Building permits & codes
RestrictedFayette County issues building permits and cross-references its own county code for stormwater compliance; the statewide Illinois building code (effective Jan 1, 2025) also applies as a baseline. source
Septic & composting toilets
Generally allowedThe Fayette County Health Department's Division of Environmental Health permits, reviews, and inspects private sewage systems under state IDPH rules; composting toilets specifically are not addressed on the county page. source
Greywater reuse
Unclear - verifyNo specific Fayette County greywater rule was found; it likely falls under the same Environmental Health septic review process. Ask the Health Department directly. source
Rainwater harvesting
Unclear - verifyNo county or state page specifically addressing residential rainwater harvesting in Fayette County was found.
Private wells & water rights
Generally allowedThe Fayette County Health Department's Division of Environmental Health permits, reviews, and inspects private wells under the statewide Illinois Water Well Construction Code. source
Living disconnected from utilities
Unclear - verifyNo county ordinance requiring utility hookups or banning off-grid living was found in this research; not confirmed either way.
Sun30-year normals
- Peak-sun hours, annual average
- 4.8 hrs/day
- Worst month (sizes an off-grid array)
- 3.1 hrs/day
- Yearly output per 1 kW of panels
- 1,390 kWh
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Weather1991-2020
- Precipitation
- 41 in/yr
- Snowfall
- 12 in/yr
- Heating degree days
- 5,253 (moderate)
- Frost-free season
- Apr 12 to Oct 21
How far help isstraight-line
- Hospital
Sarah Bush Lincoln Fayette County Hospital - 1.8 mi
- Fire station
Mulberry Grove Volunteer Fire Department - 8.4 mi
- Hardware store
Kaskaskia Supply & Rental - 0.9 mi
- Grocery
Walmart Supercenter - 0.2 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 62471).
Size a solar systemHeat loss & insulationFirewood per winterRainwater harvestGarden sizePanel tilt
Looking at a specific parcel in Fayette County, IL?The rules above are the jurisdiction. The land check runs the parcel itself: flood zone, soils and septic suitability, wetlands, slope, access, climate, and these verdicts, from a parcel number or coordinates.
Check a parcel →Share or save this report:New report
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.
New here, or not sure where this fits? Start here walks through the whole thing in order.