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Plumbing / Mechanical Permit — Unincorporated Doña Ana County, New Mexico · Requirements sheet
Verified 2026-07-05 · Source: https://www.donaana.gov/departments/community_services/building_services/permit_requirements.php
PermitBase is an independent reference and is not affiliated with any government agency. Requirements change and vary by project — confirm current details with the building department before you submit.
Plumbing / Mechanical Permit in Unincorporated Doña Ana County, New Mexico
Required for plumbing and mechanical (HVAC/gas) installations, alterations, and repairs in unincorporated Doña Ana County. Doña Ana County uses a single combined Plumbing/Mechanical permit form and fee schedule covering both trades, priced per fixture/appliance item. Obtained separately from — and only after — the building permit is issued.
Verified 2026-07-05 · Source
When you need this permit
- Cannot be issued until an associated building permit (or MHIP) has been issued, or in conjunction with an existing remodel not requiring a building permit
- Covers plumbing fixtures, water distribution, building drains, water heaters, swimming pools, water conditioners, backflow devices, evaporative coolers, ventilation/exhaust, refrigeration, ductwork, solar water heating, in-floor heating, gas piping, grease interceptors, and roof drains
- Gas unit items priced separately per unit: yard line, wall heater, range, capped opening, boiler, central furnace (by BTU), water heater (by BTU), pool heater (by BTU)
- Work must be performed by a New Mexico-licensed plumbing or mechanical contractor for tradesman-pulled permits
Required documents
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Fee schedule
Plumbing Fixture / Waste Discharge DeviceDoña Ana County Plumbing/Mechanical Permit fee form
$4.00
Water Distribution SystemDoña Ana County Plumbing/Mechanical Permit fee form
$4.00
Building Drain (Under Slab)Doña Ana County Plumbing/Mechanical Permit fee form
$4.00
Water Heater (Electric)Doña Ana County Plumbing/Mechanical Permit fee form
$4.00
Swimming PoolDoña Ana County Plumbing/Mechanical Permit fee form
$45.00
Water ConditionerDoña Ana County Plumbing/Mechanical Permit fee form
$5.00
Vacuum Breaker / Backflow DeviceDoña Ana County Plumbing/Mechanical Permit fee form
$4.00
Evaporative CoolerDoña Ana County Plumbing/Mechanical Permit fee form
$5.00
Ventilation System / ExhaustDoña Ana County Plumbing/Mechanical Permit fee form
$5.00
Refrigeration SystemDoña Ana County Plumbing/Mechanical Permit fee form
$5.00
Duct Work SystemDoña Ana County Plumbing/Mechanical Permit fee form
$8.00
Hot Water Solar Heating SystemDoña Ana County Plumbing/Mechanical Permit fee form
$8.00
In-Floor HeatingDoña Ana County Plumbing/Mechanical Permit fee form
$15.00
Gas Piping SystemDoña Ana County Plumbing/Mechanical Permit fee form
$5.00
Grease/Sand InterceptorDoña Ana County Plumbing/Mechanical Permit fee form
$4.00
Commercial Grease HoodDoña Ana County Plumbing/Mechanical Permit fee form
$8.00
Roof DrainsDoña Ana County Plumbing/Mechanical Permit fee form
$4.00
Gas Unit (each: yard line, wall heater, range, capped opening, boiler, furnace, water heater, or pool heater)Doña Ana County Plumbing/Mechanical Permit fee form, 'Total Gas Units Each At' line item
$3.00 each
Administration FeeDoña Ana County Plumbing/Mechanical Permit fee form — applies per permit
$15.00
Final Inspection FeeDoña Ana County Plumbing/Mechanical Permit fee form — applies per permit
$10.00
Review timeline
Plan review
Not published — contact the department
Inspection process
- 1
Plumbing Rough-In / Top Out
1st phase: all drain and water lines installed before slab placement; 2nd phase: all vents extended through roof, water and gas piping installed
- 2
HVAC Rough-In
All ductwork with insulation, gas vents through roof, gas piping, and dryer vent — 2nd phase
- 3
Plumbing Final / HVAC Final
All fixtures, water heater, gas piping system tested and drains in working condition (plumbing); all heating and cooling equipment installed with registers in place (HVAC). Inspection phone: (575) 647-7350.
See the full Unincorporated Doña Ana County inspection guide — scheduling & re-inspection fees →
Tips
- Doña Ana County combines plumbing and mechanical into a single permit application and fee form, unlike jurisdictions that separate them into distinct Plumbing and Mechanical permit types.
- A flat $15.00 Administration Fee and $10.00 Final Inspection Fee apply on top of the itemized fixture/appliance fees for every plumbing/mechanical permit.
- Gas-fired appliances (furnace, water heater, pool heater) are billed both as a gas unit ($3.00 each) and, where applicable, under their specific equipment line item.
Frequently asked questions
Yes. An electric water heater is billed at $4.00 on the Plumbing/Mechanical Permit fee form; a gas water heater is additionally billed as a gas unit ($3.00) based on its BTU rating.
In Unincorporated Doña Ana County, the published Plumbing Fixture / Waste Discharge Device is: $4.00. Additional published fees: Water Distribution System — $4.00; Building Drain (Under Slab) — $4.00; Water Heater (Electric) — $4.00; Swimming Pool — $45.00; Water Conditioner — $5.00; Vacuum Breaker / Backflow Device — $4.00; Evaporative Cooler — $5.00; Ventilation System / Exhaust — $5.00; Refrigeration System — $5.00; Duct Work System — $8.00; Hot Water Solar Heating System — $8.00; In-Floor Heating — $15.00; Gas Piping System — $5.00; Grease/Sand Interceptor — $4.00; Commercial Grease Hood — $8.00; Roof Drains — $4.00; Gas Unit (each: yard line, wall heater, range, capped opening, boiler, furnace, water heater, or pool heater) — $3.00 each; Administration Fee — $15.00; Final Inspection Fee — $10.00. These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.
Unincorporated Doña Ana County does not publish a plan-review timeline for this permit. Contact Doña Ana County Community Development Department — Building Services Division at (575) 647-7350; Fax (575) 525-6131; TDD (575) 525-5951 for current turnaround.
You'll need: Plumbing/Mechanical Permit Application/Fee Form. See the required-documents checklist on this page for details on each.
Unincorporated Doña Ana County requires 3 inspection(s) for a plumbing / mechanical permit, in order: Plumbing Rough-In / Top Out, HVAC Rough-In, Plumbing Final / HVAC Final. Schedule each through Doña Ana County Community Development Department — Building Services Division ((575) 647-7350; Fax (575) 525-6131; TDD (575) 525-5951).
Apply through Doña Ana County Community Development Department — Building Services Division at 845 N. Motel Blvd., Room 150, Las Cruces, NM 88007. Phone: (575) 647-7350; Fax (575) 525-6131; TDD (575) 525-5951, email: buildingservices@donaana.gov. Office hours: County administrative offices open at 8:00 AM (confirmed via the county's own delayed-opening notice stating a 2-hour delay resumes 'normal operations' at 10 a.m., i.e. normal opening is 8:00 AM); the Building Services Division's own site does not publish a distinct closing time or Building-Services-specific hours separate from general county office hours, and no further closing-time citation could be independently confirmed after checking the department's own pages, the county homepage, and the general department directory.. Official information: https://www.donaana.gov/departments/community_services/building_services/permit_requirements.php.
Unincorporated Doña Ana County, New Mexico has adopted: New Mexico is a statewide-minimum-code state under the Construction Industries Licensing Act (NMSA 1978 § 60-13-44(E)): 'All political subdivisions of the state are subject to the provisions of codes adopted and approved under the Construction Industries Licensing Act. Such codes constitute a minimum requirement for the codes of political subdivisions.' A county or municipality may become its own code-enforcement authority (operate independently of the state Construction Industries Division field office model) if it employs a certified building official and has adopted at least the current state minimum code standards (NMSA 1978 § 60-13-41(D)-(F)). GOVERNANCE MODEL CONFIRMED: unlike some New Mexico counties that route permits through the state CID field office, Doña Ana County SELF-ADMINISTERS for all trades — Building, Electrical, Plumbing, and Mechanical alike — through its own Community Development Department / Building Services Division, headed by Sean Vick, the Doña Ana County Certified Building Official/Assistant Director (per the department's own 'Welcome to Building Services' page). The division also employs its own Certified Building Inspector (Jesse Gomez), Certified Electrical Inspectors (Riley Roman, Joel Candelaria), and Certified Plumbing/Mechanical Inspectors (Candido Jasso and David Murillo) — confirming direct county-level review and inspection for every trade, not CID field-office enforcement.; 2021 International Building Code (IBC) — per the Doña Ana County Building Services 'Building Codes' page (donaana.gov); 2021 International Residential Code (IRC) — per the Doña Ana County Building Services 'Building Codes' page; 2021 International Energy Conservation Code (IECC) — per the Doña Ana County Building Services 'Building Codes' page; the county's own Single Family Dwelling Permit Application requires a signed '2021 RESCheck' Energy Certificate, confirming the 2021 IECC edition is the one actually enforced in practice; 2021 Uniform Mechanical Code (IAPMO) — per the Doña Ana County Building Services 'Building Codes' page; 2021 Uniform Plumbing Code (IAPMO) — per the Doña Ana County Building Services 'Building Codes' page; 2021 International Existing Building Code (IEBC) — per the Doña Ana County Building Services 'Building Codes' page; 2017 ICC/ANSI A117.1 (Accessible and Usable Buildings and Facilities) — per the Doña Ana County Building Services 'Building Codes' page; 2020 National Electrical Code (NEC) — per the Doña Ana County Building Services 'Building Codes' page (this matches the current 14.10.4 NMAC statewide adoption also enforced in the City of Las Cruces; NOTE: the county's own Reroof & Reroof/Overlay Permit Requirements handout still lists an older code slate — '2015 IRC; 2015 NMRBC; 2009 Energy Conservation Code; 2015 Uniform Plumbing Code; 2015 New Mexico Plumbing Code; 2012 Swimming Pool, Spa, Hot Tub Code; 2015 Uniform Mechanical Code; 2015 New Mexico Mechanical Code; 2012 New Mexico Solar Energy Code; 2017 NEC; 2017 New Mexico Electrical Code' — this appears to be a stale, unrevised handout PDF; the county's live, currently-published Building Codes page (2021 IBC/IRC/IECC/UMC/UPC family, 2020 NEC) is treated as the authoritative current adoption for this entry); 2021 International Fire Code (IFC) — per the Doña Ana County Building Services 'Building Codes' page; 2012 Uniform Swimming Pool, Spa and Hot Tub Code — per the Doña Ana County Building Services 'Building Codes' page; Doña Ana County makes clear it cannot host these copyrighted code texts online and directs the public to review physical copies in person at the Building Services Dept., 845 N. Motel Blvd., Las Cruces, NM, or to consult the New Mexico Regulation and Licensing Department (RLD) Construction Industries Division's own current-adoption page for the statewide baseline (rld.nm.gov/construction-industries/rules-laws-and-building-codes).. Local amendments apply — see the Unincorporated Doña Ana County overview page for the full list.
No — the county uses a single combined Plumbing/Mechanical Permit application and fee form covering both trades, priced per fixture or appliance item (e.g., $4.00 per plumbing fixture, $8.00 per duct work system), plus a flat $15.00 administration fee and $10.00 final inspection fee.
Sources & verification
Verified against official sources. Last reviewed 2026-07-05.
Fees, timelines, and adopted codes are researched from each jurisdiction's published records — see how we verify. Requirements change and vary by project, so always confirm the current details with the Unincorporated Doña Ana County building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.
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