Off-Grid Living in Hancock County, Mississippi

I've been digging into what off-grid living actually looks like in Hancock County, Mississippi, and the short version is: this is a coastal county with real zoning and mandatory building codes, so it's not the "wide open" kind of rural county you find further inland. Here's what I found, and where the gaps are.

Zoning. Unlike a lot of Mississippi counties, unincorporated Hancock County has an actual Zoning Ordinance and Subdivision Regulations, run by the county's Planning & Zoning Department. What you're allowed to do on a piece of raw land depends entirely on its zoning district, agricultural districts tend to be the most permissive. Before you buy or plan anything, I'd pull up the zoning map and confirm the parcel's classification with that office. And remember, this brief only covers unincorporated county land, if you're inside Bay St. Louis or Waveland city limits, those cities have their own separate codes.

Dwellings, tiny homes, RVs. The county treats RVs and mobile/manufactured homes as their own regulated categories, with a specific Recreational Vehicle Park Ordinance and a Mobile Home Checklist. I could not confirm whether a tiny house on wheels can be used as a permanent, standalone residence outside of an RV park, that's a question for Planning & Zoning directly.

Building codes. This is where Hancock County really differs from most of the state. Mississippi generally lets counties opt in or out of code enforcement, but a 2006 state law (House Bill 1406) forces five coastal counties, including Hancock, to enforce hurricane wind and flood mitigation codes, no opting out. The county currently follows the 2018 International Building/Residential Codes, and because it's in the National Flood Insurance Program, flood-zone construction (like V-Zone design certificates) adds another layer. Permits for building, electrical, plumbing, and mobile homes all run through Planning & Zoning.

Septic and composting toilets. Septic is legal and permitted, following statewide Mississippi State Department of Health (MSDH) rules, administered locally through the Hancock County Health Department. You'll need a licensed septic contractor and a licensed soil scientist. I couldn't officially confirm it, but it's common in Gulf Coast counties for septic tanks to need flotation anchoring given the flood risk, so ask the Health Department directly.

Greywater and rainwater. I found no Hancock-specific rules on either. Greywater presumably falls under the same MSDH wastewater permitting as septic, and rainwater harvesting appears to follow the general state allowance with no added county permit. Both are "not confirmed" beyond that state baseline.

Wells. Private domestic wells are state-permitted and exempt from MDEQ withdrawal permits, though drillers need to be licensed under MDEQ's Water Well Contractor rules. That said, much of the county is served by the Hancock County Utility Authority or the separate Hancock County Water & Sewer District, and it's not confirmed whether mandatory hookup applies where lines already run past your property.

Off-grid utilities. No county-level rule easing or tightening the state's general position was found, so this defers to Mississippi's baseline: off-grid solar is fine, but full disconnection from utilities is a murkier area statewide.

Bottom line: call Planning & Zoning before you do anything else here.