Off-grid site report

Simpson County, MS

31.8681, -89.7451 · 397 ft elevation
Read this before you act on anything below. This is my researched starting point for Simpson County, MS, 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 rulesSimpson County, MS

Zoning & raw-land occupancy
Unclear - verifyNo countywide zoning ordinance was found for unincorporated Simpson County; zoning exists only inside towns like Magee, each with its own zoning office. Confirm with the specific town or the county administration whether your parcel falls under any zoning at all. source
Dwellings, tiny homes & RVs
RestrictedSimpson County requires manufactured/factory-built homes to be permitted before placement and registered with the Office of Community Development and Tax Assessor, with wheels removed and skirting installed, plus a final Building Inspector sign-off before occupancy. Treatment of RVs or tiny-homes-on-wheels as permanent dwellings is not confirmed, so ask Community Development directly.
Building permits & codes
Generally allowedThe Simpson County Board of Supervisors adopted the 2021 International Residential Code and 2021 International Building Code for unincorporated areas, and the Office of Community Development issues and renews building permits for residential and commercial work, including electrical, plumbing, mechanical, and HVAC. source
Septic & composting toilets
Generally allowedSeptic systems are permitted through the Mississippi State Department of Health's Onsite Wastewater program, which covers Simpson County; a Licensed Professional Evaluator must do the soil work and a Licensed Installer must build the system. No Simpson-specific modification to this state process was found. source
Greywater reuse
RestrictedNo Simpson County-specific greywater ordinance was found; greywater appears to be handled under the same state onsite wastewater permitting regime as septic. Confirm with MSDH or the county health sanitarian for specifics. source
Rainwater harvesting
Generally allowedNo county ordinance restricting rain barrels or cisterns was found in Simpson County sources, so this appears to follow the general state baseline allowing rainwater collection.
Private wells & water rights
Generally allowedPrivate wells are regulated at the state level through MDEQ's Office of Land and Water Resources, which licenses drillers and pump installers; no Simpson County-specific well ordinance was found, and domestic wells are generally exempt from state withdrawal permits. source
Living disconnected from utilities
Unclear - verifyNo Simpson County ordinance requiring grid connection for off-grid solar or power systems was found; this is not confirmed at either the county or state level in the research, so ask the county directly before assuming full independence is unregulated.

Open the full county page with sources →

Sun30-year normals

Peak-sun hours, annual average
5.2 hrs/day
Worst month (sizes an off-grid array)
3.8 hrs/day
Yearly output per 1 kW of panels
1,372 kWh
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Weather1991-2020

Precipitation
56 in/yr
Snowfall
1 in/yr
Heating degree days
2,613 (mild)
Frost-free season
Apr 1 to Nov 1

How far help isstraight-line

Hospital
Magee General Hospital
1.0 mi
Fire station
Puckett VFD
14.7 mi
Hardware store
Broadhead Building Supplies
10.1 mi
Grocery
Walmart Supercenter
0.2 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 39111).

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.