Room Addition Permit Requirements — Phoenix, AZ
Yes, a residential building permit is required for room additions to single-family homes in Phoenix. The permit must be obtained from the City of Phoenix Planning & Development Department before construction begins.
Get exact requirements for your address →3 free searches. No account required.
What affects your permit requirement
Typical requirements
- Fee range
- $900–$2500[fee schedule]
- Department
- City of Phoenix Planning & Development Department(602) 262-7811https://shapephx.phoenix.gov/
These figures reflect typical jurisdiction data. Fees and timelines change. Run a free search on your exact address for jurisdiction-confirmed requirements before you bid or apply.
Frequently asked questions
How much does a room addition permit cost in Phoenix?
Building permit fees range from approximately $600–$1,150+ depending on the final valuation of the project, with plan review adding $195–$900+ more. The total estimated combined cost (building permit plus plan review) is typically $900–$2,500+ before sub-permits for electrical, mechanical, and plumbing, which are paid separately.
Do I need separate permits for electrical and mechanical work in my room addition?
Yes, electrical, mechanical (HVAC), and plumbing permits are required separately if those systems are extended into the addition. Each is calculated using the same fee table as the building permit and must be obtained through the City of Phoenix Planning & Development Department.
Where do I apply for a room addition permit in Phoenix?
You apply online through the SHAPE PHX portal at https://shapephx.phoenix.gov/, which is the City of Phoenix's official online permit and plan review system. Two sets of building plans must be submitted along with a completed Construction Permit/Plan Review Application.
What building code does Phoenix use for residential additions?
Phoenix has adopted the 2024 International Residential Code (IRC) for One- and Two-Family Dwellings with local amendments per City Ordinance G-7465. The current fee schedule and valuation table became effective January 20, 2026.
How is the valuation determined for my room addition permit fee?
The City of Phoenix Planning & Development Department sets the final valuation at permit issuance by multiplying the building square footage by standard construction cost rates using nationally recognized standards. For a 200–500 sq ft addition, typical valuation ranges from $30,000–$125,000 depending on finish level.