Off-grid site report

Marion County, MO

39.7249, -91.3981 · 709 ft elevation
Read this before you act on anything below. This is my researched starting point for Marion County, MO, 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 rulesMarion County, MO

Zoning & raw-land occupancy
RestrictedMarion County has adopted countywide zoning, administered with help from the County Coordinator's office and the Planning and Zoning Commission, unlike many unzoned rural Missouri counties. source
Dwellings, tiny homes & RVs
Unclear - verifyNo official Marion County text specifying dwelling size minimums, tiny-home rules, or RV residency was found; these would fall under the zoning ordinance and building permit review, so ask the County Coordinator's office directly. source
Building permits & codes
RestrictedBuilding permits are required in Marion County per the County Coordinator's office; the specific adopted code edition, if any, is not confirmed, so verify directly with the county. source
Septic & composting toilets
RestrictedThe Marion County Health Department issues permits for on-site wastewater systems, implementing Missouri DHSS's statewide onsite sewage rules. Composting toilet treatment is not confirmed. source
Greywater reuse
Unclear - verifyNo Marion County or Missouri state page specific to greywater reuse was found; contact the Marion County Health Department to ask how greywater systems are treated.
Rainwater harvesting
Generally allowedState law protects rainwater harvesting and no Marion County ordinance restricting it was found; check with the city of Hannibal or Palmyra if inside town limits.
Private wells & water rights
RestrictedWell construction statewide is governed by Missouri DNR's Well Construction Rules; no Marion-County-specific well permitting portal beyond the state system was confirmed, though the county Health Department is involved in water testing. source
Living disconnected from utilities
Generally allowedLiving disconnected from public utilities appears permitted, with no Marion County ordinance found banning it, but zoning, building permits, and septic permitting still apply to off-grid dwellings. source

Open the full county page with sources →

Sun30-year normals

Peak-sun hours, annual average
4.9 hrs/day
Worst month (sizes an off-grid array)
3.2 hrs/day
Yearly output per 1 kW of panels
1,405 kWh
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Weather1991-2020

Precipitation
41 in/yr
Heating degree days
5,587 (cold)
Frost-free season
Apr 11 to Oct 25

How far help isstraight-line

Hospital
Hannibal Regional Hospital
2.8 mi
Fire station
Hannibal Fire Station 3
0.5 mi
Hardware store
Lowe's
0.3 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 63401).

Size a solar systemHeat loss & insulationFirewood per winterRainwater harvestGarden sizePanel tilt

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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.