Permit May Be Required
Do you need a permit to replace a furnace in Phoenix, AZ?
Mechanical exemptions are limited to in-kind component repair, outdoor refrigeration units up to 5 tons, and evaporative coolers up to 6,500 cfm. Replacing a gas furnace is not exempt and requires a mechanical permit.
✓ Verified from official source
Source: City of Phoenix PDD — Work Exempt from Permit (PBCC §105.2.3) — Verified 2026-06-26
Permit rules vary by property and change over time. This is an informational guide, not legal advice — always confirm with City of Phoenix Planning & Development Department before starting work.
How to get the permit in Phoenix
Building department
Apply online
Phone
(602) 262-7811
Code in force
2018 International Residential Code with Phoenix amendments (Phoenix Building Construction Code)
Need a permit pulled? Find a licensed HVAC contractor in Phoenix
Licensed HVAC contractors near you can handle the permit and the work — compare pros on our directory.
Find a HVAC contractor in Phoenix, AZ →