Off-grid site report
Adams County, IN
40.8100, -84.9395Read this before you act on anything below. This is my researched starting point for Adams County, IN, 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 rulesAdams County, IN
Zoning & raw-land occupancy
Varies locallyAdams County has adopted countywide zoning under Indiana's enabling law (IC 36-7-4), administered by the county's Building & Planning Department, and that applies to unincorporated areas plus the towns of Geneva and Monroe by contract. Decatur, the county seat, is its own incorporated city with a separate code, so which rules apply depends on exactly where your land sits, best to confirm with Building & Planning. source
Dwellings, tiny homes & RVs
Unclear - verifyI couldn't find an official Adams County page laying out specific tiny-home minimum square footage, ceiling height, or rules on living in an RV full time. Claims about a specific size rule floating around commercial tiny-home sites aren't backed by anything from the county itself, so treat those as not confirmed and ask Building & Planning directly before you build or park anything permanent. source
Building permits & codes
Generally allowedBuilding permits are required for new construction and remodels, and the county's Building & Planning Department inspects work to enforce state and local building codes, including a separate Location Permit tied to zoning and flood map compliance. source
Septic & composting toilets
Generally allowedSeptic systems are permitted and required for any home not on sewer, administered by the county Health Department's Environmental Health Division under state ISDH rules and county ordinance. You'll need a soil test from an Indiana Registered Soil Scientist approved by the health department, and installation must be done by a registered contractor. Composting toilets aren't addressed on the county's official pages, so that's not confirmed, ask Environmental Health directly. source
Greywater reuse
Unclear - verifyNo Adams County ordinance or health department page specifically addresses greywater reuse apart from septic rules, so this is not confirmed at the local level. Assume greywater is treated like sewage requiring septic-compliant handling until the Environmental Health Division tells you otherwise.
Rainwater harvesting
Unclear - verifyI found no Adams County ordinance or building department page addressing rainwater harvesting permits or restrictions, so this is not confirmed locally. Any harvesting system tied into household plumbing would likely fall under state plumbing code, worth a call to Building & Planning to be sure.
Private wells & water rights
Generally allowedIndiana doesn't require a state permit to drill an ordinary domestic well, and drillers/pump installers are licensed by DNR's Division of Water under state law. Local health departments can still impose siting requirements like specific setback distances, and Adams County-specific well ordinance details weren't confirmed in this research, so check with the county Health Department before siting a well. source
Living disconnected from utilities
Generally allowedNo Adams County ordinance requiring hookup to public electric, water, or sewer service was found on the county's official site, and Indiana has no statewide mandatory-hookup law absent a local ordinance, so living disconnected from utilities appears permitted, though it's worth confirming nothing local has changed by calling Building & Planning.
Sun30-year normals
- Peak-sun hours, annual average
- 4.5 hrs/day
- Worst month (sizes an off-grid array)
- 2.5 hrs/day
- Yearly output per 1 kW of panels
- 1,314 kWh
JFMAMJJASOND
Weather1991-2020
- Precipitation
- 37 in/yr
- Snowfall
- 28 in/yr
- Heating degree days
- 6,156 (cold)
How far help isstraight-line
- Hospital
Adams Memorial Hospital - 1.4 mi
- Fire station
Decatur Fire Department - 1.3 mi
- Hardware store
Decatur Ace Hardware - 0.4 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 46733).
Size a solar systemHeat loss & insulationFirewood per winterRainwater harvestGarden sizePanel tilt
Looking at a specific parcel in Adams County, IN?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.