Off-Grid Living in Harding County, New Mexico

I'll be upfront: Harding County, New Mexico is about as rural as it gets (population 657, New Mexico's smallest county), and I could not find an official hardingcounty.org page covering planning, zoning, building, or environmental health. That absence is itself informative. In New Mexico's smallest, least-populated counties it's common for there to be little or no countywide zoning/building apparatus, with most regulation defaulting up to state agencies. I want to be clear I'm reporting what I could and couldn't confirm, not filling gaps with guesses.

Zoning. New Mexico's Zoning Enabling Act lets counties opt into zoning, but doesn't require it. I found no Harding County zoning ordinance or map. That suggests minimal or no countywide zoning, but I can't confirm it either way, so call the County Clerk's office to ask directly before you buy land or start building.

Dwellings, tiny homes, RVs. No Harding County ordinance on tiny homes or full-time RV occupancy turned up. Statewide, the Construction Industries Division (CID) sets minimum standards for manufactured/modular homes, but occupancy rules for RVs and tiny homes are usually set locally, and Harding County doesn't appear to have adopted anything specific.

Building permits. Where a county hasn't set up its own building department, the state's CID issues a "State Building Permit" directly, and the application asks you to name the county the project sits in. I found no evidence Harding County runs its own building department, so permits and inspections would likely run through CID rather than a county office.

Septic and composting toilets. This is state-regulated by the New Mexico Environment Department's (NMED) Onsite Wastewater/Liquid Waste Bureau. Only Bernalillo County has its own septic ordinance; everywhere else, including Harding County, falls under NMED's statewide rules. Homeowners can sometimes install simple conventional systems themselves after passing a written test, but check with NMED first.

Greywater. No Harding County greywater rule exists as far as I found. New Mexico's small-system exemption under state code applies uniformly, so household greywater reuse is generally permitted under NMED's statewide standard.

Rainwater harvesting. No county-level restriction found; the state Office of the State Engineer's general rainwater catchment guidance applies.

Wells and water rights. There's no Harding County water utility or authority I could locate. Household wells fall under the state Office of the State Engineer's permitting and prior-appropriation system, same as everywhere else in New Mexico.

Off-grid/utility disconnection. No Harding County rule requiring utility hookups was found. Combined with the apparent absence of local zoning and building codes, it's plausible off-grid living faces fewer local hurdles here than in more built-out counties, but I have no official document confirming that, so don't treat it as settled.

Bottom line: almost everything in Harding County defaults to state rules (CID for building, NMED for septic/greywater, OSE for water), because I could not confirm the county has its own zoning, building, or environmental health apparatus. Call before you build.