Off-grid site report

Winneshiek County, IA

43.3028, -91.7741 · 856 ft elevation

Read this before you act on anything below. This is my researched starting point for Winneshiek 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 rulesWinneshiek County, IA

Zoning & raw-land occupancy

RestrictedWinneshiek County has an adopted Zoning Ordinance administered by Planning & Zoning under Iowa Code 335.24; all buildings and land uses must conform to district regulations. A farm-building exemption from state law applies only to qualifying agricultural structures. source

Dwellings, tiny homes & RVs

RestrictedThe county requires a building lot of at least 1 acre (excluding right-of-way) with zone-specific setbacks. Whether tiny homes or RVs qualify as permanent dwellings is not confirmed in official sources; ask the Zoning office directly. source

Building permits & codes

RestrictedThe county requires sequential approval from the County Engineer, then the County Sanitarian, then the Zoning office, which issues the actual building permit. source

Septic & composting toilets

Generally allowedThe county Environmental Health Department issues septic permits and inspections under Iowa DNR's statewide standards (567 IAC Ch. 69). No county-specific composting toilet rule departing from the state standard was found. source

Greywater reuse

Unclear - verifyNo county or state page specifically addressing greywater reuse was found in this research; confirm directly with the County Sanitarian.

Rainwater harvesting

Unclear - verifyNo official county or Iowa DNR page addressing residential rainwater catchment was located; treat as unconfirmed and ask the county directly.

Private wells & water rights

Generally allowedThe county Environmental Health Department issues well permits and inspections locally, working within Iowa DNR's statewide private well program requirements. No specific fee was confirmed for Winneshiek County since DNR notes fees are set per county. source

Living disconnected from utilities

Varies locallyNo county ordinance banning off-grid living or mandating utility hookups was found, but the standard Engineer-Sanitarian-Zoning permitting chain still applies to any occupied structure regardless of grid connection. source

Open the full county page with sources →

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: 1,362 kWh

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Weather1991-2020

Precipitation: 35 in/yr
Snowfall: 39 in/yr
Heating degree days: 7,125 (cold)
Frost-free season: May 4 to Oct 2

How far help isstraight-line

Hospital WinnMed: 0.5 mi
Fire station Decorah Fire Department: 0.8 mi
Hardware store Harmony Mercantile: 21.0 mi
Grocery Fareway: 0.6 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 52101).

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.