Off-grid site report

Sangamon County, IL

39.8459, -89.8582 · 604 ft elevation

Read this before you act on anything below. This is my researched starting point for Sangamon 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 rulesSangamon County, IL

Zoning & raw-land occupancy

Varies locallyUnincorporated Sangamon County has countywide zoning administered by the Department of Building and Zoning under the 1969 Sangamon County Zoning Ordinance; inside any city or village (Springfield, Chatham, Rochester, Sherman, etc.), that municipality's own zoning applies instead. source

Dwellings, tiny homes & RVs

Unclear - verifyNo specific minimum dwelling size or RV-as-permanent-residence rule was found in the county zoning ordinance; placement appears to be handled case-by-case through the county's permit process, so confirm with Building and Zoning. source

Building permits & codes

RestrictedBuilding permits are required and administered by the county Building and Zoning department, now layered under Illinois's new statewide building code baseline effective January 1, 2025; check with the county on how it applies to owner-built structures. source

Septic & composting toilets

Generally allowedSeptic systems, including likely composting toilet setups, require a construction permit from the Sangamon County Department of Public Health under the state's Private Sewage Disposal Licensing Act, with IDPH holding ultimate state authority. source

Greywater reuse

Unclear - verifyNo Sangamon County-specific ordinance on residential greywater reuse was found; it likely falls under the same county-administered private sewage permitting, but this isn't confirmed, so call Environmental Health.

Rainwater harvesting

Unclear - verifyNo county ordinance specifically authorizing or restricting rainwater harvesting was found; if you plan to plumb it into a household system, check with Building and Zoning or Public Health about cross-connection concerns.

Private wells & water rights

Generally allowedPrivate wells require a permit through the Sangamon County Department of Public Health under the Illinois Water Well Construction Code, with IDPH setting the technical standards and delegating review locally. source

Living disconnected from utilities

Unclear - verifyNo Sangamon County ordinance explicitly addresses full disconnection from grid electricity or municipal water/sewer; habitability is likely assessed indirectly through building and septic/well permitting, so verify with Building and Zoning.

Open the full county page with sources →

Sun30-year normals

Peak-sun hours, annual average: 4.9 hrs/day
Worst month (sizes an off-grid array): 3.0 hrs/day
Yearly output per 1 kW of panels: 1,407 kWh

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Weather1991-2020

Precipitation: 39 in/yr
Heating degree days: 5,687 (cold)
Frost-free season: Apr 17 to Oct 14

How far help isstraight-line

Hospital Memorial Medical Center: 11.1 mi
Fire station Fire Station #8: 8.7 mi
Hardware store True Value: 9.5 mi
Grocery Gordon Food Service Store: 9.6 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 62677).

Size a solar system Heat loss & insulation Firewood per winter Rainwater harvest Garden size Panel tilt

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.