Plumbing Permit in Maricopa County, Arizona
Permit required
Yes, a permit is required
For new plumbing installations or repairs beyond like-for-like replacement
Issued byMaricopa County Planning and Development Department
By Mario Bailey, verified against official sources
Quick answer
A plumbing permit is required in unincorporated Maricopa County for new plumbing installations and major repairs. Like-for-like plumbing repairs are available as an expedited web-issued permit through the Permit Center. Gas line additions for specific appliances are also available as non-technical review permits. Applications are submitted through the county Permit Center portal.
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When a permit is usually needed
For new plumbing installations or repairs beyond like-for-like replacement
What a plumbing permit costs in Maricopa County
How Maricopa County compares in Arizona
| Jurisdiction | Permit needed? | Threshold |
|---|---|---|
| Chandler | It depends | Like-for-like replacement of water conditioning/treatment equipment, solar pool or spa heating equipment, or electric water heating equipment is exempt when the replacement has equal or lesser capacity/amperage and is installed in the same location; new pipe work or system alterations require a permit. |
| Gilbert | Permit required | Water softeners and like-for-like replacements of gas or electric water heating appliances (not tankless) installed by an Arizona licensed contractor are exempt from permit. |
| Maricopa Countythis page | Permit required | Not specified |
| Mesa | Permit required | Not specified |
| Peoria | It depends | Leak repairs, clearing stoppages and in-kind replacement of water closets, valves or fixtures are exempt, and a like-for-like water heater replacement in a one- or two-family dwelling is exempt only when performed by a licensed contractor; relocating or replacing concealed piping, valves or fixtures requires a permit. |
| Phoenix | Permit required | Not specified |
| Pima County | It depends | New pipe work, propane tanks, septic systems, sewer connections, solar water heaters, water heater replacement, and new dishwashers require a permit; clearing stoppages or repairing leaks that do not involve replacing valves, pipes, or fixtures, fixture swaps (sinks, toilets, tubs), and grade-supported water tanks up to 5,000 gallons do not. |
How to apply in Maricopa County
In Maricopa County, you apply for a residential plumbing permit at your local building department by filing an application that describes the scope of work and site, along with construction documents, before any regulated plumbing installation, alteration, or repair begins. Minor repairs that do not touch piping or fixtures are generally exempt, and once issued the permit only stays valid if work is started within its time limit.
What most plumbing permit applications include:
- For Maricopa County, a permit is required before any owner or authorized agent constructs, alters, repairs, removes, converts, or replaces a plumbing system regulated by the code (IRC R105.1).
- For Maricopa County, the application must identify and describe the work, describe the site, state the intended use and occupancy, and be signed by the applicant or an authorized agent (IRC R105.3).
- Two or more sets of construction documents must accompany the application, drawn with enough clarity to show the location, nature, and extent of the proposed plumbing work and how it will conform to code (IRC R106.1, R106.1.1).
- Minor plumbing repairs, such as clearing a stoppage or removing and resetting a water closet without rearranging pipes or fixtures, are exempt from permit (IRC R105.2).
- Once issued, a permit is only valid for a limited window, commonly 180 days, and becomes invalid if the work is not started or is abandoned within that time, though extensions can be requested (IRC R105.3.2, R105.5).
General submittal guidance from 2021 International Residential Code (IRC), Chapter 1 Scope and Administration, Sections R105 Permits and R106 Construction Documents. Source. Maricopa County Planning and Development Department sets the exact checklist for Maricopa County.
Where to apply in Maricopa County:
Maricopa County Planning and Development Department
- 301 West Jefferson Street Phoenix AZ 85003
- Phone: 602-506-3301
Plumbing Permit in Maricopa County compared with nearby Arizona localities
| Locality | Permit needed? | Threshold | What each Arizona schedule says | Verified |
|---|---|---|---|---|
| Maricopa County | Permit required | Not specified | Flat fee of $50 to install or replace plumbing equipment, fixtures, or devices under... | |
| Chandler | It depends | Like-for-like replacement of water conditioning/treatment equipment, solar pool or spa heating equipment, or electric water heating equipment is exempt when the replacement has equal or lesser capacity/amperage and is installed in the same location; new pipe work or system alterations require a permit. | No stand-alone plumbing fee line, minor combined work of 1-6 plumbing openings with... | |
| Gilbert | Permit required | Water softeners and like-for-like replacements of gas or electric water heating appliances (not tankless) installed by an Arizona licensed contractor are exempt from permit. | Individual Plumbing Permit, residential: $150 (fee schedule revised 7/1/2026). | |
| Mesa | Permit required | Not specified | A stand-alone plumbing permit is valuation based via the Residential Rate Table, $220... | |
| Peoria | It depends | Leak repairs, clearing stoppages and in-kind replacement of water closets, valves or fixtures are exempt, and a like-for-like water heater replacement in a one- or two-family dwelling is exempt only when performed by a licensed contractor; relocating or replacing concealed piping, valves or fixtures requires a permit. | Valuation-based building permit fee, minimum 87 dollars (Development Fee Schedule Rev... |
Inspections and closing out your permit
In Maricopa County, plumbing inspections are timed to whatever is about to hide the pipe: underground and under-slab piping is checked before concrete covers it, rough-in piping is pressure or water tested before walls close up, and a final inspection checks every fixture and backflow protection once the work is complete.
- In Maricopa County: piping and equipment placed under a slab or floor must be in place and inspected before any concrete is poured or floor sheathing is installed over it (IRC R109.1.1.1).
- In Maricopa County: rough plumbing, along with the mechanical, gas, and electrical rough-in, must be inspected prior to covering or concealment and before fixtures or appliances are set (IRC R109.1.2).
- In Maricopa County: rough drain, waste, and vent (DWV) piping is tested with water, air, or (for plastic piping) a vacuum, and must show no evidence of leakage before it is closed in (IRC P2503.5.1).
- In Maricopa County: the water-distribution piping is tested and must hold tight under the system's working pressure, or under a 50 psi air test for non-plastic piping, before it is concealed (IRC P2503.7).
- In Maricopa County: the framing inspection cannot proceed until the plumbing rough inspection, along with the mechanical and electrical rough inspections, has been approved (IRC R109.1.4).
- In Maricopa County: at the final drainage test, each fixture is filled and then drained, and its traps and fixture connections must prove watertight by visual inspection (IRC P2503.5.2).
- In Maricopa County: final inspection is made after all work required by the permit is complete, and includes confirming backflow protection, such as vacuum breakers on hose bibbs, is installed (IRC R109.1.6, P2902.4.3).
Schedule each inspection in advance and pass the final before you use the work or close the permit. Request inspections through the Maricopa County permit portal or by phone at 602-506-3301.
Inspection sequence from 2021 International Residential Code (IRC), Section R109 Inspections and Section P2503 Inspection and Tests. Source. An open permit left un-inspected can surface later in a title search or home sale.
Your Plumbing Permit checklist for Maricopa County
- Confirm the requirement. Yes, a permit is required. Usually needed: For new plumbing installations or repairs beyond like-for-like replacement.
- Budget the fee. Flat fee of $50 to install or replace plumbing equipment, fixtures, or devices under Minor Self Service, per the Summary of the Fee Schedule. Official fee schedule.
- Apply. In Maricopa County, you apply for a residential plumbing permit at your local building department by filing an application that describes the scope of work and site, along with construction documents, before any regulated plumbing installation, alteration, or repair begins. Minor repairs that do not touch piping or fixtures are generally exempt, and once issued the permit only stays valid if work is started within its time limit. Start at the Maricopa County permit portal.
- Keep the office details handy. Maricopa County Planning and Development Department. Phone: 602-506-3301. Address: 301 West Jefferson Street Phoenix AZ 85003.
- Plan for inspections. In Maricopa County, plumbing inspections are timed to whatever is about to hide the pipe: underground and under-slab piping is checked before concrete covers it, rough-in piping is pressure or water tested before walls close up, and a final inspection checks every fixture and backflow protection once the work is complete.
Compiled from the official sources on this page. Last checked .
Permitting activity in Maricopa County
In 2024, Maricopa County authorized permits for 36,380 new residential housing units (21,667 single-family, 14,713 in multi-family buildings), valued at $9.1B, down from 38,292 the year before. That works out to about 7.8 permits per 1,000 residents.
Source: U.S. Census Bureau, Building Permits Survey, 2024 annual data · population 4,673,096.
About Maricopa County
Maricopa County has about 1,850,862 housing units. The median home is valued at $414,700, against a median household income of $85,518. About 65% of homes are owner-occupied, and the typical home was built around 1992.
Source: U.S. Census Bureau, American Community Survey 2023 5-year.
Frequently asked questions
- Do you need a plumbing permit in Maricopa County?
- A plumbing permit is required in unincorporated Maricopa County for new plumbing installations and major repairs. Like-for-like plumbing repairs are available as an expedited web-issued permit through the Permit Center. Gas line additions for specific appliances are also available as non-technical review permits. Applications are submitted through the county Permit Center portal. Always confirm with the Maricopa County Planning and Development Department before starting.
- How much does a plumbing permit cost in Maricopa County?
- Flat fee of $50 to install or replace plumbing equipment, fixtures, or devices under Minor Self Service, per the Summary of the Fee Schedule. See the official fee schedule for current amounts.
- Where do you apply for a plumbing permit in Maricopa County?
- You can apply through the Maricopa County permit portal or contact the Maricopa County Planning and Development Department directly. The links are listed on this page.
- Can a homeowner pull a plumbing permit themselves in Maricopa County?
- Under Arizona law (A.R.S. 32-1121(A)(5), (A)(9), (A)(14)(a); 32-1164(A)(2), (B)): Arizona addresses owner-builders through its contractor licensing law rather than through the building code itself. A.R.S. 32-1121(A)(5) exempts property owners who build or improve structures on their own land and do the work themselves, with their own employees, or with duly licensed contractors, as long as the finished structure is for the owner's own occupancy and is not intended for sale or rent. Selling or renting within one year of completion or of the certificate of occupancy is prima facie evidence the project was really undertaken for sale or rent, which defeats the exemption, a rule that functions much like Florida's one-year restriction. The exemption does not waive the underlying permit requirement: several of the chapter's small-job licensing exemptions, including the $1,000 casual-work exemption in A.R.S. 32-1121(A)(14), expressly do not apply whenever the work requires a local building permit, so once a job needs a permit, anyone doing that work for someone else generally must hold an Arizona contractor's license regardless of dollar amount. Acting as a contractor without a license, on permit-required work or otherwise, is a class 1 misdemeanor under A.R.S. 32-1164, carrying a mandatory minimum fine of $1,000 for a first offense and $2,000 for a repeat offense. Confirm how Maricopa County applies this before you apply.
From the Library
What else needs a permit in Maricopa County
Every other permit type we have verified for this jurisdiction, with the rule that applies here.
| Project | Permit needed? | Threshold | Typical fee |
|---|---|---|---|
| Deck Permit | Permit required | Not specified | No deck-specific line item, valuation-based building permit fee under Table 1-A with a... |
| Electrical Permit | Permit required | Not specified | Flat rate by residential service size, $50 for 1-200 amps, $75 for 201-400 amps, $120... |
| Fence Permit | It depends | any fence over 1 foot in height requires at minimum a drainage clearance permit; fences over 6 feet require a building permit and zoning clearance | Valuation-based: fence material valued per lineal foot from $3 (barbed wire) to $18... |
| HVAC Permit | Permit required | Not specified | Flat fee of $50 for mechanical work under the Minor Self Service flat rate schedule, per... |
| Patio Permit | It depends | attached patio cover or patio enclosure connected to the house requires a building permit; ground-level open patio slab does not | No flat patio fee |
| Pool Permit | Permit required | Not specified | In-ground pools are valued at $200 per perimeter foot with the Table 1-A fee applied to... |
| Roof Replacement Permit | It depends | re-roofing is exempt unless in a wildfire hazard zone or structural changes are involved | No permit or fee for a like-kind reroof using the same material as the original roofing... |
| Shed Permit | It depends | structures under 200 sq ft with no electrical plumbing or mechanical are exempt from a building permit; all others require a permit | Non-habitable accessory buildings are valued as a private garage with the Table 1-A fee... |
| Solar Permit | Permit required | Not specified | Roof-mounted residential solar is printed at $300 ($150 inspection plus $140 plan review... |
Plumbing Permit in other Arizona localities
Everything above, sourced
Code references
National and state model-code sections the general guidance on this page is drawn from. They are not Maricopa County documents; the office above sets the local rules.
How this plumbing permit page for Maricopa County was verified. 2 official sources: maricopa.gov, maricopa.gov; fee schedule: official document. Last checked by Mario Bailey, not confirmed with Maricopa County Planning and Development Department. Rules change; confirm before you build. How we verify.
Last checked: Report an error on this page
Compare Plumbing Permit requirements across Arizona localities