A residential building permit is required in unincorporated Eddy County, New Mexico, and the New Mexico Construction Industries Division issues it because the county has no local building department12. Zoning approval comes first from Eddy County Planning & Development outside city limits, or from the city inside them34. Septic permits and inspections go through the New Mexico Environment Department for every Eddy County address, city or not, not through any building or zoning office567.
At a glance
- Building permit
- Required for residential-code work; issued by NM's Construction Industries Division1
- Zoning
- County land-use rules apply outside incorporated municipalities; city rules apply inside84
- Septic
- State NMED permit; $225 for a small conventional system up to 1,000 gallons/day9
- Owner-builder permit
- Available only for the owner's primary residence; permits and inspections still apply10
- Septic soils
- 27.2% of soils rate free of severe limits for a conventional drain field11
- Tiny homes
- Allowed as a dwelling up to 400 sq ft when code-compliant and on a permanent foundation12
- Large-parcel subdivision exemption
- Ag conveyances of 35+ acres used for farming 3+ years are exempt from subdivision review13
- Property tax
- Effective rate about 0.5%, median bill about $995/year1415
Who to call
Planning & zoning
Eddy County Planning & Development
Eddy County's Land Use ordinance, Subdivision Regulations, floodplain use permits, manufactured-home placement permits, and RV park/workforce camp permits; does not issue state building permits
101 W Greene Street, Suite 228, Carlsbad, NM 88220
Roads & driveways
Eddy County South Road Department
County road-crossing and parallel-utility-installation permits for Eddy County roads
410 E Derrick Road, Carlsbad, NM 88220
Septic permits
New Mexico Environment Department, Carlsbad Field Office
On-site liquid waste (septic) permit applications and review for Eddy County
406 N Guadalupe, Suite C, Carlsbad, NM 88220
Building permits
New Mexico Construction Industries Division (CID), Las Cruces District Office
Residential building permits for unincorporated Eddy County, which has no local building department; listed as the closest of CID's three statewide district offices to Eddy County
505 South Main Street, Las Cruces, NM 88001
Contact details are copied from each office’s official page and were checked against it on October 9, 2026.
Off-grid gear
Going off-grid in Eddy County means bringing your own water and power. The kit we’d start with:
- Water Crystal Quest Filter any source — well, rain, or creek — to drinking-clean.
- Power Bluetti Solar generators and home battery backup for living off the grid.
- Septic Soil percolation test kit Run your own perc test before paying an engineer — the first thing a septic office asks about.
- Water Well water test kit Bacteria, nitrates, hardness — know what the well on a parcel is really pumping.
These are affiliate links — we may earn a commission, at no cost to you. As an Amazon Associate, Bolthole Index earns from qualifying purchases.
Do you need a building permit in Eddy County, New Mexico?
A residential building permit is required for work in Eddy County covered by the New Mexico Residential Code, and the New Mexico Construction Industries Division (CID) issues the permit for unincorporated areas because Eddy County has no local building department12. Covered residential construction follows the 2021 New Mexico Residential Building Code, while energy, electrical, plumbing, mechanical and other requirements may also apply16. A homeowner permit is available for the owner's primary residence, but not for rental, other owned or commercial property17. A homeowner permit application must be signed by the homeowner, along with a notarized Homeowner's Responsibilities Form18. A homeowner must request inspections and correct violations, and licensed contractors must obtain permits and pass inspections for subcontracted work17. A homeowner permit cannot be used when a GB-2 or GB-98 contractor manages or supervises the project, and it does not cover HVAC, natural-gas or LP-gas installation17.
Who issues building permits in Eddy County, and how do you reach them?
There is no Eddy County building department: the New Mexico Construction Industries Division issues residential building permits for unincorporated Eddy County, and the Las Cruces District Office is at 505 South Main Street, Las Cruces, NM 88001, phone 575-524-6320192. A homeowner submission requires county planning and zoning approval, two complete sets of plans and the Multi-Purpose State Building Application3. CID calculates the building-permit fee after receiving the project's total cost and will not process the request until the fee is paid20. CID says a complete homeowner package is issued within 5 working days and residential permits are generally processed in 3 to 4 working days3. Eddy County Planning & Development is at 101 W Greene Street, Suite 228, Carlsbad, NM 88220, phone 575-887-951121. Applications may also be completed through CID's online permitting portal22.
Does Eddy County have zoning?
Eddy County regulates land use through its Land Use ordinance and Subdivision Regulations, but county ordinances are not effective inside incorporated municipalities84. A parcel inside a city follows that city's land-use process instead; for example, every property inside Artesia is zoned, and some zoning requests go through staff review, the Planning and Zoning Commission and the City Council4. A city decides zoning approval for its own parcels, but septic permits there still come from the New Mexico Environment Department5. Eddy County Planning & Development handles the county process for land outside those municipal boundaries821. The county office also administers ordinances concerning manufactured-home placement, floodplain management, workforce camps and recreational-vehicle parks21. We could not confirm a county zoning-district map or the specific setback and minimum-lot-size rules for a rural parcel, so ask Planning & Development at 575-887-9511 before fixing a site plan21.
How do septic permits work in Eddy County?
Septic (on-site liquid waste) systems in Eddy County are permitted and inspected by the New Mexico Environment Department rather than the county, and applications go to NMED's Carlsbad field office at 406 N Guadalupe, Suite C, Carlsbad, NM 88220, phone 575-885-9023523. The application must include the required site, sizing, materials, soil, geological and hydrological information6. A small conventional system with design flow up to 1,000 gallons per day has a $225 permit fee, but NMED says to pay only after it approves or conditionally approves the permit96. Request the NMED inspection 48 hours, or 2 business days, in advance and do not cover the system before it is inspected7. Only 27.2% of Eddy County's soils rate free of severe limits for a conventional septic drain field, so plan on a site evaluation and possibly an engineered system11. New Mexico also lets a homeowner install a simple conventional septic system after passing a qualification test24.
Can you live in an RV or tiny home on your land in Eddy County?
Eddy County has its own Work Force Camps and Recreational Vehicle Parks Ordinance, but that ordinance governs RV parks and workforce camps as a land use, not whether you personally can park and live in a single RV on your own parcel, so don't read it as an answer to that question21. A tiny house of up to 400 square feet, excluding lofts, may be used as a single dwelling when it provides complete living facilities, meets the New Mexico Residential Code, passes inspection and sits on a permanent foundation12. A tiny house on a chassis with its permanent axle still attached is treated as an RV and must meet RV codes and licensing; removing the axles and placing the unit on supports or a foundation brings it under the permanent-foundation tiny-house requirements12. A manufactured home needs its own state installation permit before occupancy, and Eddy County has a separate Manufactured Home Placement ordinance2521. We could not confirm Eddy County's rule on long-term RV occupancy on a private rural parcel; ask Planning & Development at 575-887-9511 before buying21.
Building a home in Eddy County: the steps, in order
- For unincorporated land, get planning and zoning approval from Eddy County Planning & Development at 575-887-9511; inside a municipality, start with that city instead3421.
- Prepare two complete sets of plans and the Multi-Purpose State Building Application3. A homeowner doing eligible work must keep the project at the primary residence and use licensed contractors for subcontracted work17.
- Apply through the CID online portal or contact the Las Cruces District Office at 575-524-63202219. Give CID the total project cost, then pay the calculated fee so processing can begin20.
- Apply for the septic permit through NMED's Carlsbad field office at 575-885-9023 before installing or modifying an on-site liquid-waste system236. Wait for NMED's approval notice before paying, then request inspection before covering the system67.
- Request the applicable foundation, slab or under-floor, frame, weather-resistive-barrier and final inspections; final electrical, plumbing and mechanical approvals come before the final general-construction inspection26.
- Do not occupy the residence until the appropriate inspector issues a certificate of occupancy or approves the final inspection, as applicable27.
What to check before you buy land in Eddy County
Confirm the parcel's zoning under Eddy County's Land Use ordinance and whether it sits in a mapped floodplain, since Eddy County requires its own floodplain permit before construction or fill in a Special Flood Hazard Area828. Ask NMED's Carlsbad field office whether the parcel can pass a septic site evaluation; countywide, only 27.2% of soils rate free of severe limits for a conventional drain field, and Eddy County sees severe drought in roughly 41.4% of years, so water and soil questions deserve real scrutiny before you buy112923. If you are buying more than 35 acres that has been used for agriculture for the preceding 3 years, that sale may be exempt from New Mexico's Subdivision Act review13. Eddy County's typical home value is about $253,886 and its effective property tax rate is about 0.5%, for a median tax bill near $995 a year, well below many rural counties301415. The nearest city of 100,000 or more people is about 117 miles from the county's center, and federal land covers 58.6% of the county3132.
Watch-outs
- Eddy County's Work Force Camps and Recreational Vehicle Parks Ordinance regulates RV parks as a land use; it does not by itself establish whether you can live in a single RV on your own private parcel, so confirm that separately with Planning & Development21.
- A homeowner permit applies only to the owner's primary residence, excludes HVAC, natural-gas and LP-gas installation, and requires licensed subcontractors to obtain permits and pass inspections17.
- Do not occupy a building where construction has been undertaken until the appropriate inspector issues a certificate of occupancy or approves the final inspection, as applicable27.
- We could not confirm that the New Mexico Construction Industries Division's Las Cruces office is formally assigned to Eddy County; call 575-524-6320 before you drive there19.
Sources
- Building Permit Guide for Residential Construction, quoted and re-checked
- NM Regulation & Licensing Dept (CID) Building Permit Guide for Residential Construction (2026 county census)
- Construction Industries Frequently Asked Questions, quoted and re-checked
- Eddy County Land Use Policies and Procedures, Ordinance No. 41, quoted and re-checked
- Liquid Waste Regulations | New Mexico Environment Department, quoted and re-checked
- Apply for a Permit | New Mexico Environment Department, quoted and re-checked
- Apply for a Permit | New Mexico Environment Department, quoted and re-checked
- Eddy County Ordinances (2026 county census)
- Apply for a Permit | New Mexico Environment Department, quoted and re-checked
- 14.5.2 NMAC Permits, quoted and re-checked
- Share of soils USDA rates "not limited" for a conventional septic drain field (SSURGO). A strict rating: the median county is about 6% and a tenth of counties are 0%, so a low figure means most lots need a site evaluation or an engineered system, not that septic is impossible. Cite it only with that caveat: Bolthole Index county data
- New Mexico Residential Building Code Amendment, quoted and re-checked
- Senate Bill 176 — New Mexico Subdivision Act (New Mexico statewide rule), quoted and re-checked
- Effective property tax rate: Bolthole Index county data
- Median property tax bill: Bolthole Index county data
- Rules, Laws, and Building Codes, quoted and re-checked
- 14.5.2 NMAC — Permits, quoted and re-checked
- Building Permit Guide for Residential Construction, quoted and re-checked
- New Mexico Construction Industries Division (CID), Las Cruces District Office (rld.nm.gov)
- Construction Industries Frequently Asked Questions, quoted and re-checked
- Eddy County Planning & Development (eddycountynm.gov)
- Forms and Applications (New Mexico statewide rule), quoted and re-checked
- New Mexico Environment Department, Carlsbad Field Office (env.nm.gov)
- NM CID Forms and Applications (Homeowner Building Permit) (2026 county census)
- 14.12.9 NMAC — Inspections (New Mexico statewide rule), quoted and re-checked
- 14.5.3 NMAC — Inspections, quoted and re-checked
- 14.5.3 NMAC — Inspections, quoted and re-checked
- Flooding (New Mexico statewide rule), quoted and re-checked
- Share of years in severe drought: Bolthole Index county data
- Typical home value (Zillow): Bolthole Index county data
- Straight-line distance from the county center to the nearest city of 100,000+ people: Bolthole Index county data
- Federal land share: Bolthole Index county data
Written October 9, 2026 from the rules quoted below, each taken from an official source and re-checked by an independent reviewer. This is research, not legal advice: rules change, so confirm with the office before you buy or build.