Building permits in Maricopa County, Arizona
Find the right authority before you build. Maricopa County permitting follows Arizona law — here is exactly who issues the permit and where to start.
County + cities (mixed)
Maricopa County Planning & Development Dept (unincorporated areas) / municipal building departments for cities
Maricopa County issues building permits for UNINCORPORATED areas through its Planning & Development Department. Within incorporated cities such as Phoenix, Mesa, Scottsdale, and Glendale, the city building/development-services department issues the permit instead. Most residents live inside a city, so confirm your jurisdiction before applying.
Permit cheat-sheet (Arizona rules)
| Project | Permit? | Authority | Typical fee | Timeline | Go / No-Go | Key notes |
|---|---|---|---|---|---|---|
| 🏠 Accessory Dwelling Unit (ADU) | Permit required | city | Valuation-based; set by the issuing city. | Phoenix ~30–90 days; Tucson ministerial review since the Nov 2024 UDC amendment. | Generally allowed | Arizona has no statewide ADU law. Phoenix and Tucson both allow ADUs by local ordinance; Tucson review is ministerial under state HB 2720. Exempt: Phoenix max 1,000 sq ft; Tucson allows ≥1 ADU per lot (up to 2 on lots with an existing home). |
| 🪵 Deck / Porch | Conditional | city | Valuation-based; Phoenix base building-permit fee is $150. | Over-the-counter or 1–3 weeks depending on complexity. | Generally allowed | Attached decks with a structural ledger connection should be verified with the building department. Exempt: Decks ≤30 in above grade (and not over a basement) are exempt. |
| 🧱 Fence / Wall | Conditional | city | Phoenix minimum permit fee $75 for fences; over-the-counter for non-corner lots under 6 ft. | Non-corner-lot fences under 6 ft processed same-day in Phoenix. | Generally allowed | Pool-enclosure fences must meet Arizona’s statewide barrier requirements (ARS §36-1681). Exempt: Phoenix: fences ≤3 ft exempt; Tucson requires a permit for fences/walls. |
| 🛖 Shed / Outbuilding | Conditional | city | Valuation-based; site-plan-only permits for small sheds in Tucson. | Small sheds often same-day/over-the-counter. | Generally allowed | Tucson is stricter than most of Arizona — even a tiny shed needs a permit there. Exempt: Phoenix: detached structures >200 sq ft require a permit; Tucson: all sheds require a permit regardless of size. |
| 🪜 Basement Finish | Permit required | city | Valuation-based; includes trade permits. | Standard plan review 2–4 weeks. | Generally allowed | Basements are uncommon in Arizona but the same permitting logic applies when finished. Exempt: Cosmetic finishing (paint, flooring) is exempt. |
| 🚗 Garage / Carport | Permit required | city | Valuation-based; includes trade permits. | New-structure plan review; varies by city. | Generally allowed | Attached and detached garages require a full building permit and plan review. Exempt: Phoenix: new detached structures over 200 sq ft require a permit. |
| ☀️ Rooftop Solar PV | Permit required | city | Building + electrical permits; fee set by city. | Tucson: residential PV <15 kW is expedited over-the-counter, often same-day. | Generally allowed | Provide proof of racking structural design for tile or flat-roof installations. Exempt: No size exemption; large/ground-mounted systems need structural review. |
| 🌡️ HVAC Replacement | Conditional | city | Mechanical permit; fee set by city (often ~$50 in county trade schedules). | Trade permits often issued same-day. | Generally allowed | Equipment must meet current energy-efficiency rules. Exempt: In-kind replacement in the same location may be exempt in Phoenix. |
| 🍳 Kitchen Remodel | Conditional | city | Valuation-based when structural/plumbing/electrical work is included. | Standard review for permitted scopes. | Generally allowed | Phoenix energy code is strict on remodels (insulation, window U-factor, HVAC). Exempt: Cabinet/countertop swap in the same layout is exempt. |
| 🛁 Bathroom Remodel | Conditional | city | Valuation-based when plumbing is relocated. | Standard review for permitted scopes. | Generally allowed | Ventilation to the exterior is required. Exempt: Fixture-for-fixture swap in place is often exempt. |
| 🏗️ Room Addition | Permit required | city | Valuation-based; includes trade permits. | Phoenix 3–4 weeks plan review; 4–5 inspections. | Generally allowed | Lot-coverage and energy-code compliance are reviewed. Exempt: No exemption — any new conditioned footprint requires a permit. |
| 🪟 Window / Door Replacement | Conditional | city | Usually no fee for in-kind swap; permit needed if opening is enlarged. | In-kind swaps typically need no review. | Generally allowed | Replacement products should meet energy-code U-factor when the code is triggered. Exempt: Same-size, in-kind replacement is generally exempt. |
| 🏘️ Roof Replacement | Conditional | city | Often over-the-counter or exempt for same-footprint re-roof. | Phoenix re-roof can be same-day/next-business-day if submitted before 3 p.m. | Generally allowed | Dust-control plans may be required during summer excavation/cutting. Exempt: Same-material, same-slope re-roof often exempt/over-the-counter. |
| 🅿️ Driveway / Parking Pad | Conditional | city | Building permit often not required; curb-cut/right-of-way work is separate. | Right-of-way permits reviewed by the city/utility. | Generally allowed | A separate right-of-way permit is usually needed to cut the curb or connect to the street. Exempt: Replacing a driveway in the same footprint (no new curb cut) is generally exempt. |
| 🏊 Swimming Pool / Spa | Permit required | city | Valuation-based; includes barrier/fencing and electrical bonding review. | Plan review 4–6 weeks; barrier inspection required before filling. | Generally allowed | Arizona’s statewide pool-barrier law (ARS §36-1681) applies in every jurisdiction. Exempt: No exemption — all pools/spas require a permit. |
| 🧱 Retaining Wall | Conditional | city | Valuation-based when over the height threshold. | Over-threshold walls need plan review. | Generally allowed | Walls in hillside/overlay zones have stricter rules. Exempt: Walls ≤30 in above grade and not supporting a surcharge are often exempt. |
Sources: Maricopa County Planning & Development — Residential Construction · City of Mesa — Residential Construction (example city permit office) · City of Phoenix — Planning & Development Department · City of Tucson — Planning & Development Services · Arizona Legislature — ARS §36-1681 (Pool Barriers)