Off-grid site report
Boone County, IL
42.2393, -88.8192 · 843 ft elevationRead this before you act on anything below. This is my researched starting point for Boone 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 rulesBoone County, IL
Zoning & raw-land occupancy
Varies locallyBoone County Planning Department administers countywide zoning for unincorporated land, but the existing Zoning Ordinance is being replaced by a new draft Unified Development Ordinance, so district rules are in flux. source
Dwellings, tiny homes & RVs
Unclear - verifyNo official Boone County page specifies minimum dwelling size, tiny-home rules, or RV-as-residence policy; likely covered in the Zoning Ordinance or draft UDO but not confirmed. Ask the Planning Department. source
Building permits & codes
RestrictedThe Boone County Building & Zoning Department requires permits for construction, with Health Department site plan approval usually required first; Illinois also adopted a statewide building code baseline effective 2025. source
Septic & composting toilets
Generally allowedThe Boone County Health Department permits and inspects septic systems under its Private Sewage Disposal Code and state IDPH rules (77 Ill. Adm. Code Part 905); licensed installers and advance notification are required. source
Greywater reuse
Unclear - verifyNo official Boone County or state page specifically addresses residential greywater reuse; it likely falls under Health Department sewage review, but this is not confirmed.
Rainwater harvesting
Unclear - verifyNo official Boone County or Illinois state rule on residential rainwater harvesting was found; status not confirmed.
Private wells & water rights
Generally allowedThe Boone County Health Department issues well construction, modification, and sealing permits under the state's Water Well Construction Code, and offers water testing. source
Living disconnected from utilities
Unclear - verifyNo explicit Boone County ban on disconnecting from utilities was found, but building permits appear to require an approved well and septic system, which limits full self-sufficiency in practice.
Sun30-year normals
- Peak-sun hours, annual average
- 4.6 hrs/day
- Worst month (sizes an off-grid array)
- 2.8 hrs/day
- Yearly output per 1 kW of panels
- 1,337 kWh
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Weather1991-2020
- Precipitation
- 36 in/yr
- Snowfall
- 31 in/yr
- Heating degree days
- 6,908 (cold)
- Frost-free season
- Apr 29 to Oct 8
How far help isstraight-line
- Hospital
Saint Anthony Medical Center - 9.9 mi
- Fire station
Belvidere Fire Department Station 1 - 1.8 mi
- Hardware store
Menards - 8.3 mi
- Grocery
Walmart Supercenter - 0.1 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 61008).
Size a solar systemHeat loss & insulationFirewood per winterRainwater harvestGarden sizePanel tilt
Looking at a specific parcel in Boone 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.