Off-grid site report
Forrest County, MS
31.2726, -89.2519 · 148 ft elevationRead this before you act on anything below. This is my researched starting point for Forrest 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 rulesForrest County, MS
Zoning & raw-land occupancy
Unclear - verifyForrest County Planning Department oversees unincorporated land use, but the specific zoning ordinance text wasn't found. Confirm directly with the Planning Department; incorporated cities like Hattiesburg and Petal have their own planning offices. source
Dwellings, tiny homes & RVs
Unclear - verifyNo Forrest County ordinance on tiny homes or RV occupancy was found. Mississippi has no statewide tiny-home law, so this is likely a local, case-by-case call by the Planning Department. source
Building permits & codes
Varies locallyThe county Planning Department does not issue certificates of occupancy or administer building codes. Hattiesburg runs its own building permitting; unincorporated county enforcement is not confirmed. source
Septic & composting toilets
Generally allowedSeptic systems are permitted and regulated statewide by the Mississippi State Department of Health, which requires a site/soil evaluation by a Licensed Professional Evaluator and installation by a Licensed Installer. No distinct Forrest County variance was found. source
Greywater reuse
RestrictedNo separate Forrest County greywater ordinance was found; the state baseline effectively folds greywater into MSDH's on-site wastewater system rules. source
Rainwater harvesting
Generally allowedNo Forrest County restriction on rainwater harvesting was found; state baseline allows typical residential collection without a permit.
Private wells & water rights
Generally allowedMississippi exempts single-family domestic wells from state groundwater withdrawal permits, though MSDH sets setback distances from septic systems and MDEQ oversees well construction standards. Check with the county health department for any added local requirements. source
Living disconnected from utilities
RestrictedNo Forrest County ordinance mandating grid connection was found. Off-grid power generation appears legal, though full disconnection may depend on your local utility or co-op's interconnection policies rather than a county rule.
Sun30-year normals
- Peak-sun hours, annual average
- 5.3 hrs/day
- Worst month (sizes an off-grid array)
- 4.2 hrs/day
- Yearly output per 1 kW of panels
- 1,394 kWh
JFMAMJJASOND
Weather1991-2020
- Precipitation
- 59 in/yr
- Heating degree days
- 1,984 (mild)
- Frost-free season
- Mar 11 to Nov 18
How far help isstraight-line
- Hospital
Merit Health Wesley - 7.7 mi
- Fire station
Hattiesburg Fire Station #3 - 0.2 mi
- Hardware store
Dirt Cheap Building Supplies - 4.7 mi
- Grocery
Sullivan's Grocery - 3.6 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 39401).
Size a solar systemHeat loss & insulationFirewood per winterRainwater harvestGarden sizePanel tilt
Looking at a specific parcel in Forrest County, MS?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.
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