Do I Need a Permit to Replace a Furnace in New Mexico?
Furnace replacement permit requirements. Even same-model swaps need a mechanical permit. What inspectors check.
Yes — even a like-for-like furnace swap requires a mechanical permit.
Why Even a Swap Needs a Permit
Furnace replacements involve gas connections, venting, and combustion air — all safety-critical systems. Most jurisdictions require a mechanical permit to verify the new furnace is properly vented, has adequate combustion air, and the gas connections are leak-free. This is true even for exact same-model replacements.
High-Efficiency Conversions
Upgrading from a standard-efficiency (80%) to high-efficiency (90%+) furnace changes the venting requirements: standard units use metal B-vent, high-efficiency units use PVC/CPVC. The old metal vent chase may need to be sealed. A condensate drain line is also required for high-efficiency units.
What Inspectors Check
The final inspection covers: gas piping and drip leg, venting type and clearances, combustion air supply (especially in confined spaces), condensate drain (high-efficiency units), thermostat operation, and CO detector presence on every level.
Bundled with AC?
If you're replacing both the furnace and AC unit at the same time, one mechanical permit typically covers both. The inspector will check the AC refrigerant lines, electrical disconnect, and condenser pad in addition to the furnace items.
Yes, always. The permit is $40-$75 and your HVAC contractor handles it. One final inspection. Don't skip it — CO poisoning from bad venting is real.
Permit fees by city in New Mexico
Verified from each city’s published fee schedule. Where a city has no separate fee listed for this project, open the city page for the current requirements and amount.
| City | Permit fee | Source |
|---|---|---|
| Alamogordo | $37.50Verified | Mechanical / HVAC Permit → |
| Albuquerque | $23.50 minimum for valuation $1–$2,000; then $23.50 for the first $500 plus $3.05 per additional $100 (to $2,000); $69.25 for the first $2,000 plus $14.00 per additional $1,000 (to $25,000); $391.75 for the first $25,000 plus $10.10 per additional $1,000 (to $50,000); $643.75 for the first $50,000 plus $7.00 per additional $1,000 (to $100,000); $993.75 for the first $100,000 plus $5.60 per additional $1,000 thereafter — modifier of 0.50 applied to the resulting valuation for one- and two-family dwellingsVerifiedvia Residential Building Permit (New Construction) | Residential Building Permit (New Construction) → |
| Artesia | $40.00Verified | Mechanical / HVAC Permit → |
| Aztec | Project valuation × 0.005 (0.5%)Verifiedvia Residential Building Permit (New Construction / Addition / Alteration) | Residential Building Permit (New Construction / Addition / Alteration) → |
| Bernalillo | $25.00Verifiedvia Residential Building Permit (CID) | Residential Building Permit (CID) → |
| Bloomfield | Project valuation × 0.005Verifiedvia New Residential Building Permit (New Construction / Addition / Accessory Building) | New Residential Building Permit (New Construction / Addition / Accessory Building) → |
| Carlsbad | $4.00-$8.00Verified | Mechanical / HVAC Permit → |
| Clovis | Same Type I valuation table used city-wide: e.g. $28.00 + $5.60 per $1,000 for $2,000–$25,000 valuationVerified | Residential Mechanical / HVAC Permit → |
| Deming | $37.50Verified | Mechanical / HVAC Permit → |
| Edgewood | Valuation-based; contact a CID office for a project-specific quoteVerifiedvia State Building Permit (NM Construction Industries Division) | State Building Permit (NM Construction Industries Division) → |
| Española | $37.50Verified | Mechanical / HVAC Permit → |
| Farmington | See city page for the current Residential Mechanical / HVAC Permit fee | Residential Mechanical / HVAC Permit → |
| Gallup | $37.50Verified | Mechanical / HVAC Permit → |
| Hobbs | $20.00Verified | Residential Mechanical / HVAC Permit → |
| Las Cruces | $150.00Verified | Residential Mechanical / HVAC Permit → |
| Los Alamos County | $37.50Verified | Mechanical / HVAC Permit (CID-Administered) → |
| Rio Rancho | $11.00 eachVerified | Residential Mechanical / HVAC Permit → |
| Roswell | $24.00Verifiedvia Residential Building Permit | Residential Building Permit → |
| Santa Fe | $40.00 per permitVerified | Mechanical / HVAC Permit → |
| Sunland Park | Calculated per the Most Current Version of the Uniform Building Code (ICC Building Valuation Data / BVD formula)Verifiedvia Residential Building Permit (New Construction / Addition) | Residential Building Permit (New Construction / Addition) → |
| Town of Taos | $250.00 per residential dwelling (attached or semi-attached units, up to 5 dwellings)Verifiedvia Residential Building Permit (Zoning Review Application) | Residential Building Permit (Zoning Review Application) → |
| Unincorporated Bernalillo County | $23.50 eachVerified | Mechanical / HVAC Permit → |
| Unincorporated Doña Ana County | $0.20 per total square foot of floor area (measured to the outside walls; to the outside edge of the floor/roof-line for a carport, covered porch, or similar structure)Verifiedvia Single Family Dwelling Permit | Single Family Dwelling Permit → |
| Unincorporated San Juan County | Heated sq ft x $0.03/sq ftVerified | Mechanical / HVAC Permit → |
| Village of Corrales | $23.50Verifiedvia Construction Permit (New Residential Construction) | Construction Permit (New Residential Construction) → |
| Village of Los Ranchos de Albuquerque | $30.00 plus $4.00 per $1,000.00 of valuationVerifiedvia Building Permit (New Construction, Addition, or Alteration) | Building Permit (New Construction, Addition, or Alteration) → |