Off-grid site report
Marathon County, WI
44.9035, -89.7782 · 1,247 ft elevationRead this before you act on anything below. This is my researched starting point for Marathon County, WI, 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 rulesMarathon County, WI
Zoning & raw-land occupancy
Varies locallyMarathon County has county zoning, but individual towns can opt to run their own zoning instead, and comprehensive zoning changes require town approval. You must confirm with Marathon County CPZ or the specific town which authority governs your parcel. source
Dwellings, tiny homes & RVs
Unclear - verifyNo countywide tiny-home or RV-as-permanent-residence ordinance was found; residential district rules come from whichever zoning authority applies, layered on the statewide Uniform Dwelling Code. Not confirmed whether any town has adopted tiny-home-specific standards. source
Building permits & codes
Generally allowedBuilding is permitted with permits administered locally by Marathon County CPZ under the statewide Uniform Dwelling Code (DSPS), alongside zoning, shoreland, and floodplain review. source
Septic & composting toilets
RestrictedSeptic systems (POWTS) are regulated and permitted through Marathon County CPZ under the statewide POWTS code; composting toilets are not separately addressed on official county pages, so confirm with CPZ. source
Greywater reuse
Unclear - verifyNo Marathon County-specific greywater ordinance was found; it appears to fall under the statewide DSPS plumbing code baseline administered alongside the county's POWTS program. source
Rainwater harvesting
Unclear - verifyNo official Marathon County page addresses rainwater harvesting; the statewide baseline (no permit for outdoor non-potable use) appears to apply without local modification.
Private wells & water rights
Generally allowedPrivate wells are permitted and built to the statewide DNR Well and Pump Code; Marathon County Health Department strongly encourages annual testing and runs a countywide groundwater sampling initiative with DNR. source
Living disconnected from utilities
Unclear - verifyNo state or Marathon County rule directly addresses fully disconnecting a legal dwelling from utilities; it's indirectly shaped by septic permitting and zoning/building conditions. Not confirmed as a standalone rule, so ask CPZ.
Sun30-year normals
- Peak-sun hours, annual average
- 4.6 hrs/day
- Worst month (sizes an off-grid array)
- 2.3 hrs/day
- Yearly output per 1 kW of panels
- 1,339 kWh
JFMAMJJASOND
Weather1991-2020
- Precipitation
- 32 in/yr
- Snowfall
- 60 in/yr
- Heating degree days
- 8,249 (severe)
- Frost-free season
- May 6 to Oct 2
How far help isstraight-line
- Hospital
Aspirus Wausau Hospital - 6.9 mi
- Fire station
Rib Mountain Fire Station - 6.0 mi
- Hardware store
Menards - 6.3 mi
- Grocery
Walmart Supercenter - 6.2 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 54402).
Size a solar systemHeat loss & insulationFirewood per winterRainwater harvestGarden sizePanel tilt
Looking at a specific parcel in Marathon County, WI?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.