Off-Grid Living in Forrest County, Mississippi

I've been digging into what off-grid living actually looks like in Forrest County, Mississippi, and I'll be upfront: this is one of those counties where the official record is thinner than I'd like, so treat some of this as a starting point for your own calls, not gospel.

Zoning and raw land. Forrest County has a Planning Department, and it's clear on one thing: it does not issue certificates of occupancy or administer building codes. It handles land use and development compliance for unincorporated parts of the county, while Hattiesburg and Petal run their own planning shops for anything inside city limits. I couldn't find the actual zoning ordinance text online, so if you're eyeing raw land, call the Planning Department before you buy. My best guess, based on how most Mississippi counties work, is that agricultural-zoned land will give you the most freedom, but I want that confirmed by the county, not assumed from me.

Dwellings, tiny homes, RVs. I found no Forrest County ordinance specifically addressing tiny homes on wheels or RV occupancy. Mississippi doesn't have a statewide tiny-home law either, so this is likely handled case by case at the local level. Ask the Planning Department directly before you park or build anything unconventional.

Building permits. This is where jurisdiction really matters. The county Planning Department explicitly does not administer building codes. Inside Hattiesburg, the City's own permitting office handles that. For unincorporated county land, I couldn't confirm whether any building code is enforced at all, since Mississippi lets counties opt in or out of a uniform code. Confirm this directly.

Septic and greywater. This one's state-run. The Mississippi State Department of Health (MSDH) regulates on-site wastewater statewide, and Forrest County falls into its south Mississippi region grouping. Any new septic system needs a site and soil evaluation by a Licensed Professional Evaluator, plus a Licensed Installer to build it. Greywater isn't split out separately in what I found, so it's effectively folded into the same septic permitting requirement.

Rainwater harvesting. No Forrest County restriction turned up in my research, and Mississippi's state baseline is permissive for typical residential rain catchment.

Wells. Good news here: Mississippi exempts single-family domestic wells from state groundwater withdrawal permits. MSDH does set minimum setbacks from septic systems and drain fields, and MDEQ oversees well construction standards. Mississippi State Extension advises checking with your county health department for any added local rules, so loop in the Forrest County Health Department too.

Off-grid utilities. No county ordinance mandating grid connection showed up. Off-grid power generation appears legal, but full disconnection could run into your local utility or co-op's interconnection policies rather than a county rule.

Bottom line: Forrest County's building and zoning enforcement is split between the county Planning Department (unincorporated land) and city offices (Hattiesburg, Petal), while septic and wells are largely state-controlled through MSDH and MDEQ. Given the gaps in public documentation, I'd treat direct phone calls as essential here, not optional.