Do I need a permit to remodel my Phoenix home?
Cosmetic and finish work is generally exempt from a permit in Phoenix. Anything that touches structure, electrical, or plumbing — beyond a like-for-like swap — is not.
Generally exempt
Painting, papering, or similar finish work.
Minor repair or like-for-like replacement of non-structural items — glass, sash, doors, hardware.
Patching walls or ceilings.
Replacing pieces of siding, soffits, or fascia.
Replacing an existing water heater in a one- or two-family dwelling.
Always requires a permit
Electrical updates, rewiring, or additions.
Moving or adding any plumbing fixture — a sink, toilet, or tub moved to a new wall is not a finish upgrade.
Any wall removal.
Gas line modifications.
The gap between exempt and non-exempt work is narrow. Patching a wall is exempt, but replacing a whole sheet of drywall requires a permit. Phoenix recommends scheduling a Planning & Development appointment before starting if your project is anywhere near that boundary.
The '50% rule' is real, but it probably isn't about you
The "50% rule" that circulates informally actually lives in Phoenix's floodplain ordinance, and it applies only to structures located in a FEMA Special Flood Hazard Area. There, a "substantial improvement" is defined as cumulative project cost — measured over a rolling five-year period — reaching 50% of the structure's pre-project market value, which triggers elevation standards.
There is no general citywide rule that requires a code upgrade once a remodel reaches some percentage of the home's value. If you're unsure whether your property sits in a mapped flood zone, confirm your flood zone status with Planning & Development before assuming this rule applies to you.
Load-bearing walls are the highest-stakes call
There is no structural exemption for load-bearing work. A contractor or engineer has to evaluate how the load transfers once a wall comes out, and beam or header sizing generally needs documentation from an Arizona-registered engineer. The framing inspection has to pass before any of it can be closed up behind drywall.
If your home predates 1978, federal law applies
Homes built before 1978 fall under the EPA's Renovation, Repair and Painting Rule. Anyone paid to disturb painted surfaces in a pre-1978 home has to be EPA-certified for lead-safe work practices. There's a narrow exemption for disturbing six square feet or less per interior room, but it doesn't extend to window replacement or demolition. Ask your contractor for their certification before work starts.
Get the full guide — $29
The 24-page Phoenix Home Remodel Guide includes the full permit decision flow, the electrical and plumbing code triggers specific to kitchen remodels, bathroom ventilation requirements, historic district review steps, a worked kitchen-remodel example, ROC license classifications, and cost ranges by project tier.
See also: Garage conversion permits · Home addition permits · As-built drawings (free) · Services