Off-grid site report
Fayette County, IA
42.8433, -91.8023 · 1,011 ft elevationRead this before you act on anything below. This is my researched starting point for Fayette County, IA, 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 rulesFayette County, IA
Zoning & raw-land occupancy
Varies locallyFayette County has countywide zoning for unincorporated areas run by Planning & Zoning with a Board of Adjustment for variances; incorporated towns like Fayette, Oelwein, and West Union have their own zoning that overrides the county's within city limits. Agricultural land does not exempt you from zoning compliance for non-farm use. source
Dwellings, tiny homes & RVs
Unclear - verifyNo Fayette County ordinance addressing tiny homes or RV-as-dwelling standards was found on the official county site; state law limits extra scrutiny on HUD-code manufactured homes, but confirm any local rule with Planning & Zoning. source
Building permits & codes
Varies locallyThe county confirms it enforces a building code in unincorporated areas as part of its land-use regulation, but specific code editions, fees, or inspection steps are not published online; confirm with Planning & Zoning. source
Septic & composting toilets
Generally allowedFayette County Environmental Health requires a permit for any new or modified septic system, installed by a certified installer and inspected by a county sanitarian under state DNR-based standards; composting toilets likely fall under the same framework. source
Greywater reuse
Unclear - verifyNo specific county or state page on residential greywater reuse was found; it likely falls under the same on-site wastewater permitting Environmental Health administers, but confirm directly with the sanitarian. source
Rainwater harvesting
Unclear - verifyNo Fayette County or Iowa DNR rule on residential rainwater catchment was found; treat it as likely unregulated at the county level unless the building or zoning office says otherwise.
Private wells & water rights
Generally allowedAll new wells in Fayette County require a permit through the county Environmental Health office, which also offers cost-share for well abandonment and rehabilitation. source
Living disconnected from utilities
Varies locallyNo county ordinance bans disconnecting from utilities, but an occupied off-grid dwelling still needs well and septic permits, and likely a building permit, from the county. source
Sun30-year normals
- Peak-sun hours, annual average
- 4.7 hrs/day
- Worst month (sizes an off-grid array)
- 2.7 hrs/day
- Yearly output per 1 kW of panels
- 1,371 kWh
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Weather1991-2020
- Precipitation
- 38 in/yr
- Snowfall
- 39 in/yr
- Heating degree days
- 7,622 (severe)
- Frost-free season
- May 2 to Oct 1
How far help isstraight-line
- Hospital
Gundersen Palmer Lutheran Hospital - 8.7 mi
- Fire station
Harlan Township Fire Department - 6.2 mi
- Hardware store
Best Way True Value Home Center - 13.4 mi
- Grocery
Quillin's Foods - 8.4 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 52142).
Size a solar systemHeat loss & insulationFirewood per winterRainwater harvestGarden sizePanel tilt
Looking at a specific parcel in Fayette County, IA?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.