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Off-Grid Laws › New Mexico

Off-Grid Living in Do̱a Ana County, New Mexico

Doña Ana County has real countywide zoning and mandatory-connection rules that can restrict off-grid wells and utility disconnection in designated service areas, on top of standard state septic, greywater, and building code baselines. Confirm your specific parcel's zone and service-area status with the county before assuming raw-land off-grid living is unrestricted.

Is it legal to live off-grid in Do̱a Ana County, New Mexico?

There is no outright ban on living off-grid in Do̱a Ana County, New Mexico - it is legal but regulated. Zoning and land use are set locally and vary by area, putting a cabin, tiny home, or RV on raw land is restricted, and building permits are generally allowed. Plan around septic/wastewater (generally allowed) and disconnecting from utilities (set locally and vary by area). Because these rules are set locally, confirm the specifics with Do̱a Ana County before you buy land or build.

Read this before you act on anything below. This is my researched starting point for Do̱a Ana County, not legal advice and not a guarantee. Rules change, and the deciding facts on any specific parcel (setbacks, perc results, overlay districts, deed restrictions, road frontage) live at the county or town office, not in any database. Before you buy land or build, confirm the current rules directly with the local zoning and health offices - the sources on this page tell you exactly who to call.
Primary-source verified · reviewed Aug 202624 government, statute, or municipal sources are linked below; the verdict card cites them where a match exists.

The verdict for Do̱a Ana County

  • Zoning: Varies locally
  • Dwellings, tiny homes: Restricted
  • Building permits: Generally allowed
  • Septic: Generally allowed
  • Greywater reuse: Unclear - verify
  • Rainwater harvesting: Unclear - verify
  • Private wells: Restricted
  • Living disconnected from utilities: Varies locally

Do̱a Ana County at a glance

Zoning & raw-land occupancy
Varies locallyDoña Ana County has adopted a comprehensive countywide Unified Development Code (UDC) with transect-based zoning, administered by the county Planning and Zoning Commission; allowed uses depend on the specific zone. source
Dwellings, tiny homes & RVs
RestrictedManufactured/mobile homes need a county installation permit (MHIP) and liquid waste connection before occupancy; RVs are addressed as campground/park units, not standalone residences, under county code. source
Building permits & codes
Generally allowedCounty Building Services enforces adopted International, National, and New Mexico codes with its own fee schedule for new construction and manufactured home placement. source
Septic & composting toilets
Generally allowedSeptic systems are permitted through the state's New Mexico Environment Department Liquid Waste Program, not the county directly, though the county has pushed septic-to-sewer conversion in some designated areas. source
Greywater reuse
Unclear - verifyNo county-specific greywater ordinance was confirmed; residents fall back on the state NMED greywater rule (20.7.3.810 NMAC). Ask the county Community Development Department if in doubt.
Rainwater harvesting
Unclear - verifyNo county-specific rainwater harvesting ordinance was confirmed; the state Office of the State Engineer's general encouragement of rooftop harvesting is the applicable baseline.
Private wells & water rights
RestrictedBeyond state OSE well permitting, the county can restrict new domestic wells within designated county water-service areas under its Water Systems ordinance, citing NMSA § 3-53-1.1. source
Living disconnected from utilities
Varies locallyWithin county-designated water/wastewater service areas, mandatory connection rules can require hookup instead of staying off-grid; outside those areas no countywide ban on disconnection was found. source

Who to call in Do̱a Ana County

Offices named on official pages during research. Phone numbers appear only when the official page showed one; confirm hours and jurisdiction before you drive out.

I've been digging through Doña Ana County's code and county/state resources, and here's the honest picture for anyone thinking about going off-grid in this part of southern New Mexico.

Zoning isn't a free-for-all here. Unlike some rural New Mexico counties that have no countywide zoning at all, Doña Ana County adopted a comprehensive Unified Development Code (UDC), administered by the county's Planning and Zoning Commission under Chapter 350 of the county code. It uses a transect-based zoning system tied to historic community patterns, so what's allowed on your parcel depends heavily on which zone it falls in. If you're near the CRRUA service area, note that zoning administration there is actually handled by the county under an interlocal agreement, not CRRUA directly.

Dwellings: if you're bringing in a manufactured or mobile home, the county requires a Manufactured Home/Mobile Home Installation Permit (MHIP) from Community Development, Building Services, before occupancy, and the unit must connect to an approved liquid waste system first. RVs are treated as campground/park units under county code, not as permanent standalone residences, so living full-time in an RV on raw land is a legal gray zone at best. Tiny homes fall under standard state-adopted building codes; I did not find a dedicated county tiny-home ordinance.

Building permits are required and enforced locally by County Building Services using adopted International, National, and New Mexico codes, with the county's own fee schedule set by resolution.

Septic is actually a state matter: the New Mexico Environment Department's Liquid Waste Program (Environmental Health Division, District III) handles permitting, not the county directly. That said, the county has been actively converting septic users to county sewer in some designated areas, so check whether your parcel is in one.

Greywater and rainwater harvesting have no county-specific rules that I could confirm; both default to New Mexico's state baseline (NMED greywater rule, OSE rainwater harvesting guidance).

Wells are where the county adds a real twist: beyond state OSE well permitting, the county can restrict new domestic wells inside designated county water-service areas, per its Water Systems ordinance citing NMSA § 3-53-1.1. So drilling your own well isn't automatically a way to dodge hookup requirements if you're in one of those zones.

Utility disconnection follows the same logic: in a county-designated service area, mandatory connection rules can require you to hook up to county water/wastewater. Outside those areas, I found no blanket county prohibition on living off-grid.

Bottom line: this is a "check your specific parcel" situation more than most counties, because so much depends on zoning district and service-area boundaries.

Planning a build in Do̱a Ana County

The rules above decide what you may build. The numbers below decide what you will have to build, and they come from this place rather than from a national average.

Confirming this for your own parcel

On this page 4 of the eight topics are recorded as unclear or as varying within Do̱a Ana County: zoning, greywater, rainwater harvesting, mandatory utility connection. Those are the calls to make first, because they are the ones where a general answer cannot be trusted for a specific parcel. Ask for the answer in writing where the office will give it, and note the name and the date where it will not.

Where a topic is recorded as settled here (what counts as a dwelling, building permits and codes, septic and sewage, wells and water rights), the source is cited further down this page. Sources go stale, ordinances get amended, and this site logs corrections publicly rather than editing them away, so if you find something here that no longer matches the county, the corrections page is how to say so.

Before any of those calls, walk the parcel with the land walk checklist and take the questions for the county with you. The parcel check pulls flood, wetland, slope, and access data for a specific parcel and shows its sources, which is a good way to arrive at the office with the questions already framed. Lesson two is the wider version of this list.

Looking at a specific parcel in Do̱a Ana County, NM?The rules above are the jurisdiction. The land check runs the parcel itself: flood zone, soils and septic suitability, wetlands, slope, access, climate, and these verdicts, from a parcel number or coordinates.
Check a parcel →

Sources

Primary sources (statutes, agencies, municipal documents)

Only government, statute, municipal, university, and regional-planning sources are listed. Pages used to find an issue but not to substantiate it are not cited. See how this database is researched.

Explore New Mexico

Live here? Help keep Do̱a Ana County accurate.

Residents, landowners, builders, and town officials: confirm what is right or tell me what is wrong. Every note is checked before it appears. Two minutes, no account.

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FAQ

Common questions about off-grid living in Do̱a Ana County

Is it legal to live off-grid in Do̱a Ana County, New Mexico?

There is no outright ban on living off-grid in Do̱a Ana County, New Mexico - it is legal but regulated. Zoning and land use are set locally and vary by area, putting a cabin, tiny home, or RV on raw land is restricted, and building permits are generally allowed. Plan around septic/wastewater (generally allowed) and disconnecting from utilities (set locally and vary by area). Because these rules are set locally, confirm the specifics with Do̱a Ana County before you buy land or build.

Can I just buy raw land in Doña Ana County and live off-grid without hooking up to utilities?

It depends on your zone and whether you're inside a county-designated water/wastewater service area. Outside those areas, I found no blanket county ban on disconnection, but inside them the county can require mandatory connection under its Water Systems ordinance.

Can I drill my own well instead of connecting to county water?

Not necessarily. Even with a state Office of the State Engineer well permit, the county can restrict new domestic wells inside its designated service areas, so check with county Public Works/Utilities first.

Does the county regulate septic systems?

No, septic permitting is handled by the state's New Mexico Environment Department Liquid Waste Program. The county does, however, promote conversion to county sewer in some areas.

Can I live full-time in an RV on my land?

County code treats RVs mainly as campground/park units rather than standalone residences, so full-time RV living on raw land is not clearly authorized; confirm with Community Development.

Are tiny homes treated differently from regular houses?

I did not find a dedicated county tiny-home ordinance; tiny homes appear to fall under standard adopted building codes like any other structure.

Keep exploring

Off-grid rules in nearby New Mexico counties

Same eight-point verdict card, county by county across New Mexico.

New here, or not sure where this fits? Start here walks through the whole thing in order.