Off-grid site report

Watonwan County, MN

43.8487, -94.8533 · 1,289 ft elevation

Read this before you act on anything below. This is my researched starting point for Watonwan County, MN, 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 rulesWatonwan County, MN

Zoning & raw-land occupancy

RestrictedWatonwan County has a countywide zoning ordinance administered by the Land Management Department, requiring land use and building permits outside incorporated cities/villages; cities like St. James have their own separate zoning. source

Dwellings, tiny homes & RVs

Varies locallyThe ordinance defines 'dwelling' but doesn't clearly address tiny homes or RVs as permanent residences; campground provisions treat RVs as temporary occupancy, and permanent use looks like a case-by-case call by the Zoning Administrator. source

Building permits & codes

RestrictedBuilding permits are required countywide outside incorporated towns per the Zoning Ordinance, but Watonwan County does not enforce the state's uniform building code. source

Septic & composting toilets

Generally allowedSeptic systems are permitted but regulated under the county's SSTS Ordinance, which ties into Minnesota Pollution Control Agency Chapter 7080 standards and requires licensed designers/installers and a Certificate of Compliance. source

Greywater reuse

RestrictedGreywater is defined and regulated within the county's SSTS Ordinance rather than as a standalone system; disconnecting greywater plumbing requires inspection by the Land Management Office. source

Rainwater harvesting

Unclear - verifyNo Watonwan County-specific rainwater catchment ordinance was found; this likely defaults to the general Minnesota baseline where rain barrels are unregulated and indoor systems fall under state plumbing code, but that's not confirmed at the county level.

Private wells & water rights

Unclear - verifyNo county well-permitting page was found; well construction likely follows Minnesota's state Well Code (Minn. Stat. ch. 103I) via the Department of Health, but whether the county issues permits directly is not confirmed, so ask Land Management. source

Living disconnected from utilities

Unclear - verifyNo blanket county requirement to connect to electric or municipal utilities was found, but the county does track septic/greywater disconnection through required Land Management inspections. source

Open the full county page with sources →

Sun30-year normals

Peak-sun hours, annual average: 4.7 hrs/day
Worst month (sizes an off-grid array): 3.1 hrs/day
Yearly output per 1 kW of panels: 1,357 kWh

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Weather1991-2020

Precipitation: 31 in/yr
Snowfall: 48 in/yr
Heating degree days: 7,940 (severe)
Frost-free season: Apr 30 to Oct 2

How far help isstraight-line

Hospital Windom Area Health: 13.1 mi
Fire station Mountain Lake Fire Department: 7.4 mi
Hardware store Schwalbach Ace Hardware: 13.1 mi
Grocery Maynards: 7.3 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 56160).

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.