The Roofing Book

Permitting Authorities / Arizona / Maricopa County Planning and Development Department

Do you need a permit to replace a roof in Unincorporated Maricopa County, AZ?

Adopted code

Maricopa County Planning and Development Department

No, Unincorporated Maricopa County, AZ does not require a permit for like-for-like roof replacement (Maricopa County Planning and Development Department). The County's Local Additions and Addenda, Section 105.2 (Work exempt from permit), lists as exempt item 7: "Roof replacement or re-roof with the same type of material as the original roofing." A permit is therefore not required for a same-material reroof. The same list exempts item 9, "Minor repair or replacement in kind of non-structural components." The County's text on a reroof that changes roofing material type, or on structural repair, was not found addressed in the sources read, so it is not stated here. Permit applications are made online in Permit Center, and questions go to 602-506-3301.

Roof code checklist: Unincorporated Maricopa County, AZ

ItemAnswerCode citeSourceVerified
Permit to replace a roofNomaricopa.gov2026-10-25
Repair permit thresholdPublishedmaricopa.gov2026-10-25
Layer limit / roof-overNot published
Deck & sheathingNot published
Drip edgeNot published
Ice & water shieldNomaricopa.gov2026-10-25
Mid-roof inspectionNot published
Impact-resistant (Class 4) roofingNot published
Wind design criteriaPublishedmaricopa.gov2026-10-25
Adopted codePublishedmaricopa.gov2026-10-25
Contractor license / registrationYesazleg.gov2026-10-25
Sales & use taxPublishedSec. 32-1121TPT_RATETABLE_10012026.pdf2026-10-25

Each row comes from the sourced record on this page; full wording is in the table below. "Not published" means no official source for that item was found when the record was last verified.

Jurisdiction
Maricopa County, Arizona (unincorporated areas)
Jurisdiction type
county
Address
301 W. Jefferson St., Suite 170, Phoenix, AZ 85003
Contact
  • url: https://www.maricopa.gov/797/Planning-Development
  • phone: 602-506-3301
Roofing permit required
Not required
Contractor registration required
Required
Registration details
  • license: STATE LAYER, applies in unincorporated Maricopa County as everywhere in Arizona. Contractors are licensed by the Arizona Registrar of Contractors under A.R.S. Title 32, Chapter 10 (32-1101 et seq.). A.R.S. 32-1121(A)(14) exempts an unlicensed person only for one project whose aggregate contract price, including labor and materials, is "less than $1,000" and whose work is "of a casual or minor nature," and says the exemption "does not apply: (a) In any case in which the performance of the work requires a local building permit." An unlicensed person who advertises must include the words "not a licensed contractor." Owner-occupants doing their own work on a structure intended solely for their own occupancy are separately exempt under 32-1121(A)(5). The specific roofing classification codes and the Registrar's own licensing page were not read for this record.
Permit process note
The County's Local Additions and Addenda, Section 105.2 (Work exempt from permit), lists as exempt item 7: "Roof replacement or re-roof with the same type of material as the original roofing." A permit is therefore not required for a same-material reroof. The same list exempts item 9, "Minor repair or replacement in kind of non-structural components." The County's text on a reroof that changes roofing material type, or on structural repair, was not found addressed in the sources read, so it is not stated here. Permit applications are made online in Permit Center, and questions go to 602-506-3301.
Adopted code
The County's Adopted Regulations index lists a Local Additions and Addenda entry dated 9/16/2022 that reads: "Text Amendment to the Maricopa County Local Additions & Addenda to adopt and amend the following construction safety codes: 2018 International Building Code, 2018 International Residential Code, 2018 International Plumbing Code, 2018 International Mechanical Code, 2018 International Fuel Gas Code, 2018 International Green Code (voluntary), 2018 International Energy Conservation Code (voluntary), 2018 International Existing Building Code, and 2017 National Electric Code." The Local Additions and Addenda (document TA2022001, 19 September 2022) replaces IRC sections R102 through R114 with "Chapter 1 of the IBC as amended in Tab F". A 2024-edition update of the Local Additions and Addenda (TA260001, dated 21 October 2026) was found on the County site as a draft; the Adopted Regulations index does not list it as adopted, so this record states the 2018 edition.
Ice & water shield
Not required — The County's Local Additions and Addenda, Tab G, Climatic and Geographic Design Criteria, carries "Ice barrier underlayment required NO." About ice & water barrier
Repair permit threshold
No dollar or square-footage threshold appears in the County's Section 105.2 exemption list. The test stated is the roofing material: "Roof replacement or re-roof with the same type of material as the original roofing." The list also exempts "Installation of a non-structural weatherproof exterior covering over an existing weatherproof covering on an existing structure so long as the new covering will not affect the fire resistive classification of the existing structure." The exemptions are conditioned by the clause that they "shall not be deemed to grant authorization for any work to be done in any manner in violation of the provisions of this code or any other laws or ordinances of this jurisdiction."
Wind design criteria
The County's Local Additions and Addenda, Tab G (International Residential Code), prints its Climatic and Geographic Design Criteria values as: Ground snow load N/A; Windspeed (mph) 115; Topographic effects NO; Special wind region NO; Windborne debris zone NO; Seismic Design Category B; Weathering Negligible; Frost line depth 0; Termite Moderate to heavy; Winter design temperature None to slight; Ice barrier underlayment required NO; Mean annual temperature 71.2 degrees F. The table states the wind figure only as "Windspeed (mph)" with no stated basis in the text read, so confirm whether a design method expects a nominal or an ultimate wind speed before using the number.
Sales & use tax
Roofing is taxed in Arizona as Prime Contracting (business code 015) under the Transaction Privilege Tax, not as a retail sale. The Arizona Department of Revenue Transaction Privilege and Other Tax Rate Tables effective October 1, 2026 list Contracting - Prime at 6.30% for Maricopa County (the 5.6% state rate plus the county rate). That table carries city rates only for incorporated cities and towns, so this record, which covers unincorporated territory, adds no city rate. A.R.S. 42-5075(B) sets the tax base at "sixty-five percent of the gross proceeds of sales or gross income derived from the business," so the 6.30% applies to 65% of contract income. The same statute excludes from the classification "any work or operation performed by a person that is not required to be licensed by the registrar of contractors pursuant to section 32-1121."

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The Maricopa County Planning and Development Department provides "land use planning and entitlement, building permit review and inspection, and code compliance" for unincorporated Maricopa County, which includes areas such as Anthem, New River and Tonopah. Incorporated cities and towns in the county (Phoenix, Mesa, Scottsdale and others) issue their own building permits, so a roof inside city limits is that city's permit and not the County's. The Department is at 301 W. Jefferson St., Suite 170, Phoenix, and takes applications online through Permit Center. Arizona has no statewide building code, so the County's own Local Additions and Addenda control. This listing covers the office's contact details, the adopted code edition, the re-roof permit exemption, the design wind speed and ice barrier entries, and the state licensing and tax rules that apply to a roofer working in unincorporated Maricopa County.

Working an insurance claim in Unincorporated Maricopa County, AZ? Everything on this page (drip edge, ice & water shield, inspections, Class 4 rules) formatted as a claim-ready evidence pack: verbatim ordinance quotes, code section cites, verification dates, and official source links, ready to attach to a supplement. See a real sample pack (PDF, 4 pages, free).

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Sources

Roofing questions: Unincorporated Maricopa County, AZ

Do you need a permit to replace a roof in Unincorporated Maricopa County, AZ?

No, Unincorporated Maricopa County, AZ does not require a permit to replace a roof. No dollar or square-footage threshold appears in the County's Section 105.2 exemption list. The test stated is the roofing material: "Roof replacement or re-roof with the same type of material as the original roofing." The list also exempts "Installation of a non-structural weatherproof exterior covering over an existing weatherproof covering on an existing structure so long as the new covering will not affect the fire resistive classification of the existing structure." The exemptions are conditioned by the clause that they "shall not be deemed to grant authorization for any work to be done in any manner in violation of the provisions of this code or any other laws or ordinances of this jurisdiction."

Is ice & water shield required in Unincorporated Maricopa County, AZ?

No. The County's Local Additions and Addenda, Tab G, Climatic and Geographic Design Criteria, carries "Ice barrier underlayment required NO."

Do roofing contractors need a license or registration in Unincorporated Maricopa County, AZ?

Yes. STATE LAYER, applies in unincorporated Maricopa County as everywhere in Arizona. Contractors are licensed by the Arizona Registrar of Contractors under A.R.S. Title 32, Chapter 10 (32-1101 et seq.). A.R.S. 32-1121(A)(14) exempts an unlicensed person only for one project whose aggregate contract price, including labor and materials, is "less than $1,000" and whose work is "of a casual or minor nature," and says the exemption "does not apply: (a) In any case in which the performance of the work requires a local building permit." An unlicensed person who advertises must include the words "not a licensed contractor." Owner-occupants doing their own work on a structure intended solely for their own occupancy are separately exempt under 32-1121(A)(5). The specific roofing classification codes and the Registrar's own licensing page were not read for this record.

What building code does Unincorporated Maricopa County, AZ use?

The County's Adopted Regulations index lists a Local Additions and Addenda entry dated 9/16/2022 that reads: "Text Amendment to the Maricopa County Local Additions & Addenda to adopt and amend the following construction safety codes: 2018 International Building Code, 2018 International Residential Code, 2018 International Plumbing Code, 2018 International Mechanical Code, 2018 International Fuel Gas Code, 2018 International Green Code (voluntary), 2018 International Energy Conservation Code (voluntary), 2018 International Existing Building Code, and 2017 National Electric Code." The Local Additions and Addenda (document TA2022001, 19 September 2022) replaces IRC sections R102 through R114 with "Chapter 1 of the IBC as amended in Tab F". A 2024-edition update of the Local Additions and Addenda (TA260001, dated 21 October 2026) was found on the County site as a draft; the Adopted Regulations index does not list it as adopted, so this record states the 2018 edition.