Off-Grid Living in St. Martin Parish, Louisiana

St. Martin Parish, Louisiana is one of those places where the answer to "can I do this off-grid?" really depends on whether you're inside a town's limits or out in the unincorporated parish. I dug through the parish's official pages and Louisiana state health department sources to sort out what I could confirm, and where I hit gaps I'll tell you plainly.

Zoning: The parish does have countywide zoning for unincorporated areas, run by the St. Martin Parish Planning & Zoning Department. But if your parcel sits inside St. Martinville, Breaux Bridge, Henderson, Parks, or Cade, that municipality's own zoning rules take over instead of the parish's. Before you buy raw land, I'd call the parish or the relevant town hall to find out which set of rules actually governs your parcel.

Tiny homes, RVs, and dwelling size: I could not verify specific minimum dwelling size or RV-occupancy rules from the parish's official ordinance text (it's buried in Appendix C of the parish Code of Ordinances). Louisiana's statewide construction code (LSUCC) generally follows the IRC, including Appendix Q for tiny houses, as a baseline, but how the parish applies that locally to RV living or accessory dwellings isn't something I can confirm without pulling the actual zoning schedule. Ask the Planning & Zoning Department directly.

Building permits: The parish requires a permit before you build, add on, move, or change the use of a structure, administered through the parish Building Permit Office under the Louisiana State Uniform Construction Code plus a parish ordinance. Again, incorporated towns may run their own separate permitting on top of, or instead of, the parish's process.

Septic and composting toilets: Onsite wastewater systems are state-regulated by Louisiana's Department of Health, Bureau of Sanitarian Services, with the local St. Martin Health Unit sanitarian handling permits and site evaluations. Composting toilets aren't specifically addressed in state statute, so if you want to skip a conventional septic system, you'd need sign-off from the parish sanitarian.

Greywater and rainwater: I found no parish-specific ordinance on either. Both fall under the general statewide plumbing code as administered through the parish Building Permit Office, meaning greywater reuse is restricted to whatever the state plumbing code allows for limited fixtures, while rainwater harvesting looks to be permitted without extra parish red tape.

Wells: Private wells are regulated at the state level by the Louisiana Office of Conservation. The parish itself doesn't run well permitting, though local water districts operate in the area if you'd rather hook into rural water than drill.

Off-grid utility living: I didn't find a parish ordinance mandating connection to water, sewer, or electric service. Louisiana state law generally protects your right to use utility services without local interference, but that's not the same as a right to disconnect entirely, and the parish's property-standards enforcement could still come into play. Worth a direct call to Planning & Zoning to be safe.