Off-grid site report
Lake County, IL
42.1835, -87.9472 · 679 ft elevationRead this before you act on anything below. This is my researched starting point for Lake 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 rulesLake County, IL
Zoning & raw-land occupancy
Varies locallyUnincorporated Lake County is governed by the Unified Development Ordinance (Chapter 151), which sets zoning districts and permitted/conditional uses; incorporated cities and villages set their own zoning instead. source
Dwellings, tiny homes & RVs
RestrictedThe UDO treats camping units like RVs and travel trailers as accessory/temporary uses limited per parcel, not full-time residences; tiny home legality as a permanent dwelling is not confirmed, so check with Planning, Building & Development. source
Building permits & codes
RestrictedThe Lake County Planning, Building and Development Department requires permits and adopted the 2024 ICC code series (with amendments, including sprinkler requirements for one- and two-family homes) for unincorporated areas. source
Septic & composting toilets
Generally allowedSeptic systems are regulated under Lake County Code Chapter 171 and require Health Department approval and often a Site Development Permit, with plans stamped by a licensed Illinois engineer or surveyor; composting toilets are not specifically addressed at the county level. source
Greywater reuse
Unclear - verifyNo Lake County page specifically addresses residential greywater reuse permitting; it falls under state plumbing code via IDPH, and the county Health Department would need to be asked directly for any local interpretation. source
Rainwater harvesting
Generally allowedLake County's own site promotes cisterns for rainwater harvesting and non-potable reuse, describing general design features, but there's no dedicated residential permitting page, so confirm indoor-connected setups with Building or Health first. source
Private wells & water rights
Generally allowedPrivate wells require a permit application through the Lake County Health Department, must meet the state Water Well Construction Code's separation distances, and need Health Department approval on location and size. source
Living disconnected from utilities
Unclear - verifyNo explicit county rule bans full grid disconnection, but new dwellings require septic and/or well approval alongside a building permit, which functions as a practical requirement, per the county's New House guidance. source
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
- 1,344 kWh
JFMAMJJASOND
Weather1991-2020
- Precipitation
- 33 in/yr
- Heating degree days
- 6,410 (cold)
- Frost-free season
- Apr 25 to Oct 21
How far help isstraight-line
- Hospital
Advocate Children's Hospital - Oak Lawn - 33.6 mi
- Fire station
Countryside Fire Station #2 - 3.9 mi
- Hardware store
Lake Forest True Value Hardware - 4.8 mi
- Grocery
Thrupthi Foods - 2.9 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 60069).
Size a solar systemHeat loss & insulationFirewood per winterRainwater harvestGarden sizePanel tilt
Looking at a specific parcel in Lake 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.