Arizona Owner-Builder Permit Guide

By a retired general contractor with 15+ years building custom homes — about the author. Last updated: September 2026.

Arizona is sold as the "no statewide code" state, and that part is true. What the circulating advice gets wrong is the next step, where "no statewide code" turns into "no permit," "no rules," and "varies locally" for things that are in fact fixed by statute on every lot in the state. This guide draws the line between the two: what your city or county decides, and what Arizona has already decided for them.

The freedom is real, and it is written into the Registrar of Contractors statute rather than left to local policy. So is the paperwork. What an Arizona owner-builder needs to understand before the first shovel is which of the rules on this page are the state's, which are the county's or city's, and how to get the local ones in writing.

Arizona Building Code Overview

Always confirm the current edition with the local building department before you design or submit plans. Do not count on fire as a statewide exception. A state fire code exists (§ 37-1383(A)(2)), but its exit and fire-protection provisions exclude "family dwellings that have fewer than five residential dwelling units," the State Fire Marshal's inspection authority excludes them again, and enforcement is ceded to any city of 100,000 or more with its own nationally recognized fire code. For a house, the live fire rules are the fire district's adopted code, or the county's where no district has one (§ 11-861(B)), plus the smoke-alarm provisions of the locally adopted residential code. The real statewide exceptions are the ones in the table further down: septic, wells, pool barriers, plumbing fixtures and the ban on sprinkler mandates.

Current Code Adoption (2026 — varies by jurisdiction)

Every row below was read from the jurisdiction's own website or adopting ordinance on September 3, 2026. The spread runs from the 2003 IRC in Graham County to the 2024 IRC in Pima, Yavapai, Coconino and Yuma counties and in Cochise County from September 1, 2026. Cells marked "not verified" could not be closed on a primary source and should not be relied on. Whatever the table says, confirm the adopting ordinance number with the clerk before you design to an edition.

Arizona adopts no edition of the National Electrical Code statewide, has no state electrical inspector, and licenses no individual electricians. The NEC that governs your wiring is the one in your local adopting ordinance, and the map above runs from the 1999 and 2002 editions in Graham County through 2011, 2014, 2017 and 2020 to the 2023 NEC in the larger cities and counties. Never wire from a national code book without checking the ordinance. One dated wrinkle: Phoenix adopted the 2023 NEC but "is deferring enforcement at this time" of the GFCI requirement for HVAC equipment, with "full enforcement … March 1st, 2027."

Transition rules are local too. There is no state grace period when an edition changes. Phoenix honored 2018 plans "submitted through December 31, 2025"; Tempe accepts either set "through December 31, 2026"; Coconino County accepts 2018 plans "through 12/31/26"; Lake Havasu City accepted 2018-designed projects for 90 days after its effective date. Get the grace-period sentence from the ordinance in writing before you choose the edition to design to.

What Is Statewide Regardless of Local Code

The list of desert-driven "requirements" that used to sit here (termite treatment, landscape rules, drainage standards) was unsourced and is gone. Termite exposure, frost, wind, snow and flood criteria are set in the locally adopted residential code's design-criteria table, and landscape rules are zoning. What follows is the opposite list: the rules that are state statute and apply on every lot in Arizona, including in Greenlee County and under the Cochise County opt-out permit.

One exemption that does not reach a house: the county code article "does not apply to" construction incidental to "farming, dairying, agriculture, viticulture, horticulture or stock or poultry raising" (§ 11-865(A)). Nothing in that section says a dwelling is incidental to farming, and this guide prints no "agricultural exemption" route to a house. If you think your barn qualifies, get the county's position in writing under § 11-1609 before you rely on it.

Arizona Owner-Builder Laws

Legal Rights — the owner-builder exemption (A.R.S. § 32-1121(A)(5))

Under A.R.S. § 32-1121(A)(5), owners of property who build or improve structures on that property and "do the work themselves, with their own employees or with duly licensed contractors" are exempt from contractor licensing, provided the structure is "intended for occupancy solely by the owner" (not by the public as the owner's employees or business visitors) and is "not intended for sale or for rent." The definitions section closes the loop: "residential contractor … does not include an owner making improvements to the owner's property pursuant to section 32-1121, subsection A, paragraph 5" (§ 32-1101(A)(10)(b)), and "only contractors as defined in this section are licensed and regulated by this chapter" (§ 32-1101(B)).

So as an Arizona owner-builder you may:

• Build, improve, or repair a residence on property you own
• Pull permits as the owner-builder without a contractor's license
• Do the work yourself, use your own wage employees, or hire ROC-licensed subcontractors
• Act as your own general contractor

Critical Restrictions

Building a spec home (for sale or rent): A separate "developer" exemption (A.R.S. § 32-1121(A)(6)) lets a property owner build for sale or rent only if the work is contracted to a licensed general contractor whose name and license number appear in all sales documents. There is no owner-as-general-contractor route to a spec house.

The statement on your permit application: Arizona has no statewide owner-builder form, but the content of one is statutory, and this is the line most summaries miss. Every county, city or other authority that requires a building permit "shall require that each applicant for a building permit file a signed statement that the applicant is properly licensed … If the applicant purports to be exempt from the licensing requirements of this chapter, the statement shall contain the basis of the asserted exemption and the name and license number of any general, mechanical, electrical or plumbing contractor who will be employed on the work" (§ 32-1169(A)). The authority "may require from the applicant a statement signed by the registrar to verify any purported exemption." Filing false information "with the intent to avoid the licensing requirements of this chapter is unsworn falsification pursuant to section 13-2704" (§ 32-1169(B)). Tucson's Owner/Builder Affidavit, Scottsdale's Owner-Builder Declaration, Lake Havasu City's notarized Owner/Builder Certification, Casa Grande's affirmation and Mohave County's exemption block on the application are all the same thing: each department's implementation of § 32-1169. Three consequences. You must know at application which licensed general, mechanical, electrical and plumbing contractors will be on the job, so the list of subs with ROC numbers comes before the permit, not after. Ask the counter whether it wants an ROC-signed verification and, if so, get it first. And the one-year rule is civil and rebuttable; lying on this statement is not.

Trade work — electrical, plumbing, HVAC: Because the exemption lets you "do the work themselves" and the chapter does not treat you as a contractor at all, an owner-occupant may legally perform their own electrical, plumbing, and mechanical work on a home they own and will occupy. You are not required to hire a licensed electrician or plumber because the work needs a permit; there is no chapter in Arizona's licensing title for electricians, plumbers or HVAC technicians as individuals, only for contracting entities (§ 32-1101(A)(3), (B)). The local question is administrative: whether your building department will issue you the electrical or plumbing permit. Every department site this guide read answers yes for an owner-occupied house, and every one draws the line at rentals. Goodyear: "If you own the house and live in it, you do not need to hire Licensed Contractors … If you own the house and rent it out, Licensed Contractors are required." Tucson: "Rental units are considered commercial property and all commercial permits require a licensed contractor." That is § 32-1121(A)(5)'s "not intended … for rent," applied at the counter. Permits and inspections still apply and you remain responsible for full code compliance.

Owner can perform (on a house you own and will occupy):

• Framing, foundation, concrete work
• Electrical, plumbing, and mechanical, including gas connections, on a homeowner permit
• Painting, flooring, tile
• Finish carpentry
• Landscaping

Who May Help You — Three Lawful Categories and One Crime

The paragraph allows the owner to do the work "themselves, with their own employees or with duly licensed contractors." The rest of the chapter fills in the edges.

• Your employees. The chapter does not apply to "any person who engages in the activities regulated by this chapter, as an employee of an exempt property owner or as an employee with wages as the person's sole compensation" (§ 32-1121(A)(11)). A helper paid wages is lawful. A helper paid by the job, by a share, or in kind is not an employee.
• Licensed contractors. Verify every license at the Registrar of Contractors. To be covered by the Residential Contractors' Recovery Fund, the contractor must have been licensed on the date the contract was signed, the date the first payment was made and the date the work first commenced (§ 32-1132(C)).
• The casual-work exemption is closed to a house. Unlicensed work under an aggregate contract price of $1,000 that is "of a casual or minor nature" is exempt, but "this exemption does not apply: (a) In any case in which the performance of the work requires a local building permit. (b) In any case in which the work or construction is only a part of a larger or major operation" (§ 32-1121(A)(14)). A house build is both.
• Gas and fire-safety work are never exempt for a hired hand. The exemptions in paragraphs 4, 9 and 14 of § 32-1121(A) never cover "fire safety and mechanical, electrical and plumbing work that is done in connection with fire safety installation" (hardwired or interconnected smoke alarms and sprinklers) or "work … that involves connecting to any supply of natural gas, propane or other petroleum or gaseous fuel" (§ 32-1121(D)). That subsection limits paragraphs 4, 9 and 14, not paragraph 5, so the owner-builder may still do this work personally; a non-employee helper may not.
• The crime. "It is unlawful for any person … to engage in the business of, submit a bid … act or offer to act in the capacity of or purport to have the capacity of a contractor without having a contractor's license" (§ 32-1151), and "evidence of securing a permit from a governmental agency or the employment of a person on a construction project shall be accepted in any court as prima facie evidence of existence of a contract." Contracting without a license is a class 1 misdemeanor with a fine of "not less than one thousand dollars" for a first offense and "not less than two thousand dollars" thereafter (§ 32-1164). An unlicensed contractor cannot sue to collect (§ 32-1153) and "shall not have the lien rights" (§ 33-981(C)).

The chapter penalizes the unlicensed contractor, not the owner who hired one. Your exposure is practical: no recovery fund, no ROC complaint jurisdiction, a helper who can walk away without contract or lien rights, and, if the helper is not a wage employee, a possible workers' compensation and injury-liability problem covered below.

Contracts and complaints: Every contract "in an amount of more than $1,000 entered into between a contractor and the owner of a property to be improved shall contain in writing at least" the contractor's name, address and license number; your name, mailing address and the jobsite address; the contract date; "the estimated date of completion"; a description of the work; the total price "including all applicable taxes"; the dollar amount of any advance deposit; the dollar amount and construction stage of every progress payment; and your right to complain to the Registrar, "prominently displayed in the contract in at least ten-point bold type" (§ 32-1158(A)). Arizona sets no statutory deposit cap, so negotiate one. A written complaint to the Registrar about a new home "must be filed … within two years after the earlier of the close of escrow or actual occupancy" (§ 32-1162(A)), so the window starts the day you move in, not the day the defect appears. An owner who "actually occupies or intends to occupy" the house as a primary residence is an eligible claimant against the Recovery Fund for damage caused by a licensed residential contractor (§ 32-1132(B)(1)), one more reason the licensed-sub route matters.

License Verification: Arizona Registrar of Contractors — roc.az.gov

Liens — the Owner-Occupant Shield

The same status that switches off the one-year presumption blocks subcontractor liens. "No lien provided for in this article shall be allowed or recorded by the person claiming a lien against the dwelling of a person who became an owner-occupant prior to the construction … except by a person having executed in writing a contract directly with the owner-occupant" (§ 33-1002(B)), and any waiver of that section "is void" (§ 33-1002(C)). Outside the shield, "every contractor, subcontractor, architect, builder or other person having charge or control of the construction … is the agent of the owner," and the owner "shall be liable for the reasonable value of labor or materials furnished to his agent" (§ 33-981(B)), which is how a sub's supplier reaches you. The working rule: record the deed before construction, live in the house, write a direct contract with every sub and supplier you want to have lien rights, and none with anyone else. Everyone except a wage laborer must serve you "a written preliminary twenty day notice" within twenty days of first furnishing labor or materials as "a necessary prerequisite to the validity of any claim of lien" (§ 33-992.01(B), (C)); keep every one you receive, because that file is your lien ledger.

Insurance Considerations

• Workers' compensation: the exclusion is a two-part fact test, not a homeowner exemption (§ 23-901(6)(b); § 23-902(A)). A written independent-contractor agreement with the eight statements listed in § 23-902(D) "creates a rebuttable presumption of an independent contractor relationship," and a sole-proprietor sub may sign the statutory waiver in § 23-961(N). Have both on file before anyone is paid by the day.
• Liability insurance recommended
• Builder's risk insurance strongly recommended (fire risk in desert)

Permit Costs in Arizona

Who Sets Each Fee

Fees Fixed by State Law

Processing Timelines

Plan Review

Permit Validity

Permit life is local, and this guide prints no statewide figure because none exists. The one verified number is Cochise County's Owner-Builder Amendment permit: 36 months, with one 12-month extension on written request showing substantial progress. Two state clocks do run: a septic Construction Authorization expires if construction is not complete within two years (A.A.C. R18-9-A301(D)), and a well must be completed within one year of the notice of intent (§ 45-596(E)). Confirm building-permit life with your city or county.

Energy Code Requirements

Which Energy Code Applies Where

The "typical Zone 2B insulation minimums" table that used to sit here could not be traced to any Arizona jurisdiction and is gone. No R-value, U-factor, SHGC or air-leakage number is an Arizona requirement; the one statewide envelope number that exists is the military-airport rule (R-18 walls, R-30 roof and ceiling, § 28-8482(B)), and it is a noise rule. What can be stated is which edition each jurisdiction adopted, as read on September 3, 2026:

HVAC:

• High-efficiency equipment pays for itself in Arizona because cooling is the dominant load; size it from a load calculation, not a rule of thumb
• Proper duct sealing critical
• Whether duct testing is required depends on the IECC edition your jurisdiction adopted and its amendments; ask the building department

Arizona-Specific Energy Strategies

Critical for Desert:

• Solar heat gain control: Low-SHGC windows, overhangs, shade structures
• Radiant barrier: Highly recommended in the attic
• Light-colored roofing: Reflects solar radiation
• High-efficiency AC: AC is the primary energy use
• Proper insulation: Focus on ceiling and attic, where heat enters

Solar panels: No state requirement to install them, but the state clears the path. A solar permit application needs only the location, mounting details, a one- or three-line diagram and inverter cut sheets; no engineer's stamp may be demanded "unless an engineering stamp is deemed necessary" with a written explanation, and the fee is capped at the actual cost of issuing the permit (§ 9-468; § 11-323). Any deed restriction or CC&R that "effectively prohibits the installation or use of a solar energy device … is void and unenforceable" (§ 33-439).

Special Arizona Considerations

Expansive Soils (Phoenix Metro)

Monsoon Drainage

Requirements:

• Proper lot grading (positive drainage away from house)
• Swales, French drains and retention or detention basins where your city's or county's grading and drainage ordinance requires them; confirm with your jurisdiction
• A floodplain permit where the lot touches a mapped flood hazard zone; Greenlee County issues its building permit only with one, and a 100-year flood hazard zone on the parcel is a "limiting condition" for a septic design (A.A.C. R18-9-A310(C)(2))
• Check the FEMA Flood Map Service Center before you buy

Desert Landscaping (Xeriscaping)

Landscape water rules are local zoning; no statute sets them statewide, so confirm with your city or county whether turf limits, plant lists or irrigation rules apply to your lot. What is statewide is inside the house: since 1994 no one may install a plumbing fixture "in any new residential construction" unless faucets and showerheads flow no more than 3 gpm at 80 psi, water closets use no more than 1.6 gallons per flush and urinals no more than 1 gallon (§ 45-312), and where a permit is required the compliance labels "shall not be removed from the fixtures … until the fixtures have been installed and inspected" (§ 45-314(B)).

Sensible in the desert regardless of rule:

• Native and drought-tolerant plants
• Drip irrigation rather than spray
• Mulch or rock coverage

Termite Protection

Pre-treatment:

• Chemical soil treatment before the slab, or a physical barrier, per the locally adopted code
• Confirm with your building official which termite provisions the adopted edition and amendments carry

Alternative: Pressure-treated lumber, physical barriers

Wildfire Protection (WUI Zones)

Where to ask:

• Mountain areas (Prescott, Flagstaff, Payson, Show Low)
• Desert edge areas
• Rural areas with vegetation

What a WUI ordinance typically requires:

• Class A fire-rated roof
• Ignition-resistant construction
• Defensible space, at the distance the ordinance sets
• Non-combustible materials near the house

The costs that used to appear here were unsourced. Read the ordinance, then price it.

Water Availability

Well water (rural areas). The well rules are state law and apply on every lot:

• Exempt well. A well with a pump of "not more than thirty-five gallons per minute" for non-irrigation use is exempt from most of the Groundwater Code (§ 45-454(B)), but "a person shall file a notice of intention to drill with the director pursuant to section 45-596 before drilling an exempt well" (§ 45-454(G)). The notice is signed by the owner (A.A.C. R12-15-809), ADWR mails a drilling card within 15 days of a complete notice, drilling may start only with the card at the well site, and the well must be completed within one year (§ 45-596(D), (E); R12-15-810(A)).
• You may drill your own. New well construction must be "under the direct and personal supervision of a well driller who holds a well driller's license" (§ 45-595(A)), but "a person who drills or modifies an exempt well on land owned by that person shall first obtain a single well license from the department … No fee may be charged for a single well license" (§ 45-595(D)). The license is an exam, not a form: the application lists the rig, the design, any helpers and whether they are paid, and the applicant's experience; ADWR offers the examination at least six times a year, the passing grade is 70 percent, and the license covers one exempt well at one location for one year (R12-15-807).
• Site plan on 5 acres or less. If the well will serve domestic use "on a parcel of land of five or fewer acres," the notice must carry a site plan with the assessor's parcel number, the proposed well location, "any septic tank or sewer system that is either located on the property or within one hundred feet of the proposed well site," and "written approval by the county health authority that controls the installation of septic tanks" (§ 45-596(F)). A variance for parcel size or geology may require a registered engineer's or geologist's certification (§ 45-596(G)).
• 100 feet from septic, from both sides. "No well shall be drilled within 100 feet of any septic tank system, sewage disposal area," landfill or fuel storage "unless authorized in writing by the Director" (A.A.C. R12-15-818). ADEQ's septic rule states the same 100 feet from the other side, so on a small lot the well and the drainfield, including its reserve area, are the first two things to draw.
• The 100-foot municipal-provider ban. Since 2006, an exempt well "may not be drilled on land if any part of the land is within one hundred feet of the operating water distribution system of a municipal provider with an assured water supply designation" inside an active management area established on or before July 1, 1994, with exceptions if service is refused within 30 days, connecting costs more than the well, or the provider agrees in writing (§ 45-454(C), (D)). In an AMA, one exempt well per use per site, with a second only under strict conditions (§ 45-454(I)).
• Construction. Steel or thermoplastic casing extending at least one foot above ground, a surface seal of at least 20 feet of steel casing grouted in one continuous application with at least one and one-half inches of annular space (R12-15-811(A), (B)); the driller's report within 30 days of completion and the owner's completion report within 30 days after the pump goes in, with the 4-hour tested capacity, drawdown and static level (§ 45-600). A new owner reports any open well within 30 days of a change of ownership (§ 45-593(D)).
• Well depths and drilling costs vary with the aquifer; get written quotes from licensed drillers for your parcel. No figure is printed here.

Municipal water: Available in urban and suburban areas. A permit may not be denied based on the utility provider you propose (§ 9-467(B); § 11-321(B)).

Hauled water: Some very rural areas rely on hauled water. The Cochise County Owner-Builder Amendment requires only that "potable water shall be available to the dwelling site."

Septic Systems

Common in rural Arizona, and governed by one statewide rulebook: ADEQ's general Aquifer Protection Permits for on-site wastewater facilities, A.A.C. Title 18, Chapter 9, Article 3, administered by the county agency ADEQ has delegated under § 49-107 (the issuer for each county is in the county table above). These rules apply in Greenlee County and under the Cochise opt-out exactly as they do in Maricopa.

A to-scale plot plan is the cheapest way to find out whether the well, the drainfield and its reserve area all fit before you pay for a design. The free Site Plan Studio draws one, dimensions every separation on the sheet, and prints it letter size.

Septic construction cost is a market figure that depends on soil and system type; get quotes after the site investigation, not before. The permit fee is set by the delegated county.

Off-Grid Considerations

Arizona is popular for off-grid building:

• Solar panels (excellent sun), with the permit limits in § 9-468 and § 11-323 on your side
• Battery storage
• Well or hauled water, under the well rules above
• Septic system, under the ADEQ rules above; there is no off-grid exemption from them
• Propane for cooking and backup; a helper who is not your wage employee may not connect it without a license (§ 32-1121(D)), though you may do it yourself

Two facts for the off-grid reader. Under the Cochise County Owner-Builder Amendment, "no dwelling or accessory structure constructed pursuant to this amendment shall be required to be connected to a source of electrical power, or wired, or otherwise fitted for electrification." And where no county inspects the wiring, nobody does before the utility connects it: what APS, SRP, TEP, UniSource or a co-op requires before setting a meter is in the utility's own service-requirements manual, which this guide did not read. Ask the utility, in writing, what clearance it needs, before you frame.

Inspection Requirements

Rural and no-code areas: building inspections drop away only in Greenlee County, under Cochise Option 2, and under Coconino's cabin program. Zoning, floodplain, septic and well inspections remain, and the certificate of occupancy a lender or buyer will ask for is not available in those programs and cannot be obtained later. Coconino's program page says it yields no utility "green tag," so settle the utility's clearance rule before you build under any of them.

Top Counties for Owner-Builders in Arizona

Population figures and "minimal regulation" labels that used to appear here were unsourced and, in three cases, wrong. What follows is what each county's own ordinance or page says.

1. Yavapai County (Prescott area)

• 2024 IRC and 2023 NEC effective January 1, 2026 (Ords. 2025-3 to 2025-13); the county kept the 2012 IECC
• Mountain climate, cooler than Phoenix; frost and snow criteria are the county's, so get them in writing
• Septic through the Environmental Services Unit of Development Services
• Good balance of rural and developed land

2. Pinal County (between Phoenix and Tucson)

• 2018 IRC, 2017 NEC and 2018 IECC (Ord. 121819-BCO); the code applies "within the unincorporated areas of Pinal County, except as otherwise provided by statute" — there are no no-code areas
• Septic through the county's Aquifer Protection Division, delegated by ADEQ
• Good access to the Phoenix metro; land generally cheaper than Maricopa County

3. Cochise County (Sierra Vista area)

• Full code program: 2024 IRC and 2023 NEC from September 1, 2026 (Resolution 26-23), 2012 IECC continued
• The Owner-Builder Amendment is the state's one real owner-builder opt-out: a rural owner-builder on a parcel of at least four acres in a zoning district with a four-acre minimum may skip plan review and inspections, once every five years, under Option 1 (plans reviewed, only mechanical, electrical, plumbing and fire inspections, a "conditioned" CO) or Option 2 (no plans, no building inspections, no CO). A notice that the permit was issued under the amendment "shall be recorded with the County Recorder" and follows the title forever, use of it "would be considered a factor against a rezoning to a higher density," and it exempts nothing about septic, smoke detectors, fire-district codes or state law
• Plans may be hand-drawn; permit life 36 months plus one 12-month extension
• Rural and affordable, with lower land costs

4. Mohave County (Bullhead City, Lake Havasu City, Kingman)

• 2018 IRC and 2017 NEC (Ord. 2021-03, revised through July 15, 2024); energy via IRC Chapter 11 only
• The Building Safety Code applies to all unincorporated areas; the old partial "building overlay" survives only as an amnesty for pre-2008 structures, so do not build on the assumption of an unregulated pocket
• Publishes an owner-builder septic application; an owner may install a conventional system
• Very affordable land, hot climate

5. Coconino County (Flagstaff area)

• 2024 IRC and 2023 NEC effective June 2, 2026 (Ord. 2026-03), with 2018-code plans accepted through December 31, 2026; 2018 IECC
• The Alternative Methods and Materials Permit lets a rural owner-builder on at least two acres build a one-story dwelling of 600 sq ft or less without a traditional permit, plan review or inspection, on signed affidavits and a recorded Notice of Disclosure Statement, with no CO and no utility green tag. It is a cabin program, not a house program
• Mountain climate, four seasons, higher elevation; snow and frost criteria are the county's
• Septic through Community Development's Environmental Quality Division

The county with no code at all. Greenlee County's own engineer, in a letter still posted on the county site: "Currently, Greenlee County has adopted no building codes. Because we have no codes, Greenlee County has not determined and does not recommend building loads, does not review plans, does not inspect construction, or issue a Certificate of Occupancy … With some exceptions, Arizona Law requires the County to issue a building permit. We issue a building permit at no cost when a Zoning Use Permit and Floodplain Permit are issued." That is § 11-321(A) in practice: a no-code county is not a no-permit county. The ROC exemption, the § 32-1169 statement, the septic and well rules, the pool-barrier and fixture statutes all apply there, and no CO will ever exist for the house.

Areas to Approach with Caution

• City of Scottsdale: 2021 IRC and 2020 NEC with the 2021 International Green Construction Code mandatory alongside the 2021 IECC, an Owner-Builder Declaration through the Tax Audit Division, and a high-end market
• Cave Creek/Carefree: Premium land and demanding design review; read the town's ordinance before you buy
• Sedona: Beautiful but expensive, with strict aesthetic requirements

Key Resources

• Arizona Registrar of Contractors — license verification, complaints, the Residential Contractors' Recovery Fund; the owner-builder exemption is A.R.S. § 32-1121(A)(5) and the permit-application statement is § 32-1169
• Arizona Revised Statutes — Title 32, Chapter 10 (contractors); Title 9, Chapter 7 (municipal codes and licensing time frames); Title 11, Chapters 2 and 6 (county permits and codes); Title 33, Chapter 7 (liens); Title 45 (wells); Title 49, Chapter 2 (aquifer protection)
• Arizona Department of Environmental Quality — onsite wastewater — the general permits, the Notice of Intent form, and the delegation list; the rule text is A.A.C. R18-9-A301 to A316
• Arizona Department of Water Resources — well drilling — notice of intention to drill, the single well license and exam, licensed-driller search; the construction rules are A.A.C. R12-15-801 to 822
• Cochise County Owner-Builder Amendment — the program page and the ordinance text
• Greenlee County Planning & Zoning — the County Engineer's letter on building codes and loading standards
• FEMA Flood Map Service Center — whether the lot touches a flood hazard zone
• Your county's delegated septic agency — Development or Community Development Services in Pima, Pinal, Yavapai, Mohave, Coconino, Navajo, Gila, La Paz and Yuma counties; Environmental Services in Maricopa; the health department in Apache, Graham, Greenlee and Santa Cruz
• Your city or county building department — the adopting ordinance number, the fee schedule, the inspection list, and the § 9-836 or § 11-1606 list of steps you are owed at application

Common Questions

Q: Can I build without permits in Arizona? A: No. Every county "shall require a building permit for any construction of a building … exceeding a cost of $1,000" (§ 11-321(A)), and cities require one by ordinance. What you can do, in one county and two opt-out programs, is build without a building code: Greenlee County reviews and inspects nothing, and Cochise (four acres or more) and Coconino (600 sq ft or less) let a rural owner-builder skip plan review and inspection. The permit, the zoning and floodplain permits, the septic and well rules and the § 32-1169 statement still apply, and no certificate of occupancy will exist, which lenders and buyers will ask about.

Q: What must I put on the permit application? A: A signed statement of the licensing exemption you claim (§ 32-1121(A)(5)) and "the name and license number of any general, mechanical, electrical or plumbing contractor who will be employed on the work" (§ 32-1169(A)). Line up your licensed subs before you apply, and ask whether the counter wants an ROC-signed verification of your exemption. A false statement is unsworn falsification (§ 32-1169(B); § 13-2704).

Q: How much can I save as owner-builder? A: It depends on how much of the labor you do and how well you buy. No savings percentage is printed here because none can be sourced. What Arizona does give you is the right to do your own trade work on an owner-occupied house, which in many states is the largest line item you would otherwise have to hire out.

Q: Is financing available? A: Difficult but possible. Local credit unions and USDA rural loans are the usual routes, and every lender will want a certificate of occupancy at the end, so build in a code jurisdiction if you need a construction loan. See the financing page for the lender list.

Q: Should I build in a WUI fire zone? A: Understand the ordinance first. WUI codes are optional per jurisdiction (§ 9-806; § 11-861(D)), so ask whether one covers your lot and read it before you price the build. Insurance is the other half of the answer; get a quote before you buy the land. No jurisdiction may require sprinklers in a single-family house (§ 9-807; § 11-861(E)).

Q: Can I drill my own well? A: Yes, on your own land, for an exempt well of 35 gpm or less. You need a no-fee single well license from ADWR, which requires passing ADWR's exam with a 70 percent grade, and a notice of intention to drill with a drilling card in hand before you start (§ 45-595(D); § 45-596; A.A.C. R12-15-807, R12-15-810). On a parcel of five acres or less the notice needs a site plan with the county health authority's written approval showing any septic system within 100 feet (§ 45-596(F)), and no well may be drilled within 100 feet of any septic system without the ADWR Director's written authorization (R12-15-818). Depth and cost depend on the aquifer; get quotes.

Arizona Owner-Builder Timeline

The overall duration that used to be printed here was unsourced. Before you build a schedule, get the city's posted time frames (or the county's answer to a § 11-1609 letter), the septic Construction Authorization, and the ADWR drilling card in hand, because those are the three clocks that gate everything else. Then read up on material lead times (late windows or cabinets can stall a build for weeks) and the interior trim installation guide — trim is detail work most owner-builders can DIY.

Advantages:

• Can work year-round
• Statutory clocks, one-request-for-corrections rule and automatic refund on city permits (§ 9-835)
• Minimal weather delays

Final Thoughts

Arizona offers excellent owner-builder opportunities:

• An exemption written into statute, with the owner carved out of the definition of contractor by name
• The right to do your own electrical and plumbing on an owner-occupied house
• A statewide permit, one no-code county and two rural opt-outs, so you know exactly where the code reaches and where it does not
• Year-round building season
• Septic and well rules that are the same everywhere, so a lot can be checked before you buy it

Success factors:

1. Record the deed before construction and move in — it switches off the one-year presumption and blocks subcontractor liens (§ 32-1121(A)(5); § 33-1002)
2. Line up your licensed subs before you apply — their names and ROC numbers go on the § 32-1169 statement
3. Get the adopting ordinance number — the code edition, energy rule, setbacks, frost, snow and termite criteria are all in it, and they are all local
4. Draw the well and the drainfield first — 100 feet apart, 50 feet from a well-served neighbor's line, reserve area included
5. Write to the counter — a § 9-839 or § 11-1609 clarification letter must be answered in 30 days, and it turns every "varies locally" answer on this page into a document you can rely on

Whether building in the Phoenix metro or the rural mountains, Arizona's combination of a statutory exemption and a clear line between state and local rules makes it attractive for owner-builders who read the statute first.

Arizona Owner-Builder FAQs

Can you build your own house in Arizona without a license?

Yes. Under A.R.S. § 32-1121(A)(5), an owner who builds or improves a structure on property they own and does the work themselves, with their own employees or with licensed contractors is exempt from contractor licensing, as long as the house is intended for occupancy solely by the owner and not for sale or rent. The definitions section adds that a residential contractor does not include an owner making improvements under that paragraph (§ 32-1101(A)(10)(b)). You still need a building permit on every lot in Arizona (§ 11-321(A) for counties; city ordinance in cities), and your application must carry the signed exemption statement required by § 32-1169.

Do you need a contractor's license to build your own home in Arizona?

No, not to build a home you own and will occupy. The Registrar of Contractors exemption in A.R.S. § 32-1121(A)(5) lets you act as your own general contractor. A license is required if you build for sale or rent, which needs a licensed general contractor named in the sales documents under § 32-1121(A)(6), or if you do construction work on someone else's property for pay. Selling, renting or offering the house for sale or rent within one year of completion is prima facie evidence you were contracting without a license, unless you are an owner-occupant under § 33-1002.

Can a homeowner do their own electrical and plumbing in Arizona?

Yes, on a house you own and will live in. Arizona licenses contractors, not individual electricians or plumbers, and the contractor chapter expressly does not treat an owner improving the owner's own property as a residential contractor (§ 32-1101(A)(10)(b); § 32-1121(A)(5)). The local question is whether your building department issues a homeowner electrical or plumbing permit, and every department site this guide read does so for an owner-occupied house while requiring a licensed contractor for a rental — Tucson, Chandler and Goodyear say so in as many words. Permits and inspections still apply, and a hired helper who is not your wage employee may not do gas connections or fire-safety wiring (§ 32-1121(D)).

How long must I wait before selling a home I built as an owner-builder in Arizona?

The statute does not bar a sale; it creates a rebuttable presumption. Under A.R.S. § 32-1121(A)(5), selling, renting, or offering the home for sale or rent within one year of completion or the certificate of occupancy is prima facie evidence that you were contracting without a license, and 'rent' includes compensation in labor. The presumption does not apply in an action against an owner-occupant as defined in § 33-1002, meaning a natural person who recorded a deed to the property before construction began and who lives in the house at least 30 days in the twelve months after completion. Record the deed first and move in; if you might sell sooner than a year, talk to an attorney before you start.

Does Arizona have a statewide building code?

No. Arizona has no statewide residential building, energy or electrical code; each city, town and county adopts its own by an ordinance that must be published in full and filed with the clerk (A.R.S. § 9-802; § 11-864). As of September 2026 the spread runs from the 2003 IRC in Graham County to the 2024 IRC in Phoenix, Tucson, Mesa, Chandler, Glendale, Goodyear and in Pima, Yavapai, Coconino, Yuma and Cochise counties, with Maricopa County, Gilbert, Peoria and Flagstaff still on 2018. What is statewide is the building permit itself (§ 11-321(A)), the permit-application statement (§ 32-1169), septic (A.A.C. R18-9), wells (Title 45), pool barriers (§ 36-1681), plumbing fixtures (§ 45-312) and the ban on sprinkler mandates (§ 9-807; § 11-861(E)). Verify the exact code edition, including the NEC edition, with your local building department and ask for the adopting ordinance number.

Can you build without a permit in Arizona?

No. A.R.S. § 11-321(A) requires every county to require a building permit for construction over $1,000, and cities require one by ordinance, so there is no no-permit county in Arizona. There is one no-code county: Greenlee County has adopted no building code and issues its permit at no cost with the zoning-use and floodplain permits, with no plan review, inspection or certificate of occupancy. Cochise County (parcels of four acres or more) and Coconino County (dwellings of 600 square feet or less) let a rural owner-builder opt out of plan review and inspection while keeping the permit. Septic, well, zoning and floodplain rules apply everywhere, and the missing certificate of occupancy makes the house harder to finance, insure and sell.

Is there an owner-builder form or affidavit in Arizona?

There is no statewide form, but the content is statutory. A.R.S. § 32-1169(A) requires every county, city or other permitting authority to make each building-permit applicant file a signed statement that they are properly licensed or, if claiming an exemption, the basis of the exemption and the name and license number of any general, mechanical, electrical or plumbing contractor who will be employed on the work. The authority may also require a statement signed by the Registrar verifying the exemption. Tucson's Owner/Builder Affidavit, Scottsdale's Owner-Builder Declaration and Lake Havasu City's notarized Owner/Builder Certification are local implementations of that section. Filing false information to avoid licensing is unsworn falsification under § 32-1169(B) and § 13-2704.

How long does an Arizona building permit take?

It depends on whether the lot is in a city or a county, and the difference is statutory. A city must post its administrative-completeness and substantive-review time frames, may make only one comprehensive request for corrections, may not deny a residential application without a fifteen-working-day notice of excessive deficiencies, must refund all review fees if it breaks those rules or misses its overall time frame, and may not change an approved plan during construction (A.R.S. § 9-835). In a city of 30,000 or more, a single-family permit that is not acted on within fifteen working days after the construction documents are approved may go to third-party review (§ 9-470.01). None of those rules apply to a county permit for a residential lot (§ 11-1605(M)(2)); the county's only statutory duty is inspections at the earliest reasonable time (§ 11-863(B)). Anywhere, a written request for clarification must be answered within thirty days (§ 9-839; § 11-1609).

Related State Guides

Building in a nearby Southwest state? Check the requirements for:

• New Mexico Owner-Builder Permit Guide
• Nevada Owner-Builder Permit Guide
• California Owner-Builder Permit Guide
• Utah Owner-Builder Permit Guide
• Colorado Owner-Builder Permit Guide

Compare owner-builder exemption & permit rules for all 50 states →

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Last updated: September 2026, when every claim on this page was re-read against its primary source: the Registrar of Contractors statute (A.R.S. Title 32, Chapter 10, including §§ 32-1101, 32-1121, 32-1151, 32-1158, 32-1162, 32-1164 and 32-1169), the municipal and county building-code and permit statutes (§§ 9-467, 9-468, 9-801 to 9-810, 9-834 to 9-839, 9-470.01, 11-321, 11-815, 11-861 to 11-866, 11-1604 to 11-1609), the lien statutes (§§ 33-981, 33-992.01, 33-1002), the well statutes (§§ 45-454, 45-595, 45-596, 45-600) and the aquifer-protection statute (§ 49-241) at azleg.gov; ADEQ's onsite wastewater rules (A.A.C. R18-9-A301 to A316 and E302) and ADWR's well construction rules (A.A.C. R12-15-801 to 822); the Cochise County Owner-Builder Amendment, the Greenlee County Engineer's letter, and the adopting ordinances or code pages of fifteen counties and twenty cities, read September 3, 2026. This sweep corrected the central claim of the previous version, that some rural counties require no permit (§ 11-321(A) makes a county building permit mandatory statewide; Greenlee County has no code and still issues one), added the § 32-1169 permit-application statement and the § 33-1002 owner-occupant switch, reversed the claim that counties review faster than cities (county residential permits are carved out of the time-frame statute entirely), and removed rather than softened every figure that could not be sourced: permit-fee tables, review times in days, insulation R-values, defensible-space distances, well depths and costs, septic costs and savings percentages. Code adoption, local ordinances and delegated-county fees change often; confirm the adopting ordinance number and fee schedule with the city or county where you plan to build before relying on anything here.