Off-Grid Living in San Miguel County, New Mexico

I'll be upfront: San Miguel County, New Mexico was a tough one to research. There's another San Miguel County in Colorado with a much more thoroughly documented land-use and septic code, and it's easy for search engines (and researchers) to accidentally pull that county's rules instead. I've screened those Colorado sources out entirely. What's left is a real but thinner picture of the New Mexico county, and I want to be honest about where the gaps are rather than paper over them with guesses.

Zoning and raw land. San Miguel County does have a Planning & Zoning Department, and its stated job is to oversee "orderly, harmonious and planned development" in the unincorporated county, plus enforce the county's Land Use, Litter and Solid Waste Ordinance and floodplain rules. But I could not pull the actual zoning district text or find anything specific about whether you can camp on or occupy raw land while building. Call the department directly before you buy land or move onto it.

Dwellings, tiny homes, RVs. No county-specific rule on tiny homes or full-time RV living turned up. Statewide, New Mexico's Construction Industries Division (CID) sets baseline codes for manufactured and modular homes, but how San Miguel County treats RV or tiny-home occupancy specifically is not confirmed. This is a "call and ask" situation.

Building permits. The county's Planning & Zoning office handles code enforcement and permits in unincorporated areas, working off state CID minimum construction codes as the baseline. Any local amendments to those codes weren't confirmed in my research.

Septic. This one's solid: New Mexico's Environment Department (NMED) runs the Liquid Waste Program statewide, and San Miguel County is not one of the counties (only Bernalillo County is) with its own separate septic ordinance. So you'd apply directly to NMED for a septic permit, and simple conventional systems can be installed by a licensed contractor or by a homeowner who passes NMED's written test.

Greywater and rainwater. Both fall under favorable statewide policy. NMED's greywater rule allows small residential systems without a permit, and the Office of the State Engineer generally encourages rooftop rainwater harvesting for on-site use. I found no county-specific wrinkle on either.

Wells and water rights. Handled by the state, not the county. New Mexico's Office of the State Engineer administers well permits and water rights under prior appropriation, statewide, San Miguel County included.

Utility disconnection. Not confirmed at any level. No statute or county page addressed a mandatory grid-connection requirement, so if a rule exists it would most likely live in local subdivision covenants rather than county ordinance.

Bottom line: septic, greywater, rainwater, and wells are governed clearly by the state, and you can plan around those with confidence. Zoning, dwelling types, and building specifics need a direct call to San Miguel County Planning & Zoning before you commit to a plan.