Off-grid site report
Randolph County, IL
37.9101, -89.8408 · 390 ft elevationRead this before you act on anything below. This is my researched starting point for Randolph 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 rulesRandolph County, IL
Zoning & raw-land occupancy
Varies locallyRandolph County's Land Resource Management Office enforces the county zoning ordinance in unincorporated areas and in towns without their own zoning code; municipalities with their own zoning override the county's rules. source
Dwellings, tiny homes & RVs
Unclear - verifyNo official county page specifies minimum dwelling size or RV-as-residence rules; manufactured homes fall under the statewide IDPH Manufactured Home Installation Code. Confirm specifics with Land Resource Management. source
Building permits & codes
RestrictedLand Resource Management requires building permits and zoning-compliance certificates for structures in unincorporated areas; whether a specific building code beyond the statewide code is formally adopted locally is not confirmed. source
Septic & composting toilets
Generally allowedThe Randolph County Health Department permits, inspects, and monitors septic systems under the Illinois Private Sewage Disposal Code and a county Private Sewage Disposal Ordinance; some soils (recessional moraines) may be unsuitable and require extra evaluation. source
Greywater reuse
Unclear - verifyNo official Randolph County rule directly addresses greywater reuse; the septic application implies all household wastewater must route into the approved septic system rather than being diverted separately. source
Rainwater harvesting
Unclear - verifyNo official Randolph County page addresses residential rainwater harvesting one way or the other; not confirmed.
Private wells & water rights
Generally allowedThe Randolph County Health Department permits and inspects all new private wells under the Illinois Department of Public Health's Water Well Construction Code, and offers water testing. source
Living disconnected from utilities
Unclear - verifyNo county ordinance was found that specifically prohibits or permits disconnecting from grid electricity or municipal water/sewer; likely governed case-by-case under general zoning/occupancy review.
Sun30-year normals
- Peak-sun hours, annual average
- 4.9 hrs/day
- Worst month (sizes an off-grid array)
- 3.2 hrs/day
- Yearly output per 1 kW of panels
- 1,382 kWh
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Weather1991-2020
- Precipitation
- 43 in/yr
- Snowfall
- 5 in/yr
- Heating degree days
- 4,612 (moderate)
- Frost-free season
- Apr 8 to Oct 28
How far help isstraight-line
- Hospital
Memorial Hospital - 1.6 mi
- Fire station
- none within range
- Hardware store
Cotton's Ace Hardware - 11.9 mi
- Grocery
Aldi - 12.7 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 62259).
Size a solar systemHeat loss & insulationFirewood per winterRainwater harvestGarden sizePanel tilt
Looking at a specific parcel in Randolph 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.