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Permitting Authorities / Arizona / City of Williams - Building Department

Do you need a permit to replace a roof in Williams, AZ?

Adopted code

City of Williams - Building Department

The City of Williams, Arizona (Coconino County) oversees construction through its Building Department at 113 South 1st Street. The Department's page says a Building Permit "is required for all construction work, ranging from a fence or room addition by a homeowner to a major development." The City's Building and Design Criteria sheet lists the 2024 International Building Code and the 2024 International Residential Code among its design codes and prints the City's residential design values, including a 105 mph wind speed, a 60 PSF ground snow load and an ice barrier requirement. Arizona has no statewide building code, so the City's own adoption controls. This listing covers the office's contact details, the design codes and values, and the state licensing and tax rules that apply to a roofer working in Williams.

Roof code checklist: Williams, AZ

ItemAnswerCode citeSourceVerified
Permit to replace a roofNot published
Repair permit thresholdNot published
Layer limit / roof-overNot published
Deck & sheathingNot published
Drip edgeNot published
Ice & water shieldYes2024 Design Criteria.pdf2026-10-25
Mid-roof inspectionNot published
Impact-resistant (Class 4) roofingNot published
Wind design criteriaPublished2024 Design Criteria.pdf2026-10-25
Adopted codePublished2024 Design Criteria.pdf2026-10-25
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
City of Williams, Arizona
Jurisdiction type
city
Address
113 South 1st Street, Williams, AZ 86046
Contact
  • url: https://www.williamsaz.gov/departments_and_services/building_department
  • phone: 928-635-4451
Contractor registration required
Required
Registration details
  • license: STATE LAYER, applies in Williams 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." The City's Building Department page links a Builder / Contractor Information Form, which was not read. The specific roofing classification codes and the Registrar's own licensing page were not read for this record.
Permit process note
The Building Department page says "Homeowners, contractors or developers who build or improve any structure used or intended for supporting or sheltering any use or occupancy must obtain a Building Permit," and that starting without a required permit can bring a fine of double the permit fee, "as much as $300.00 per day" once notified. The page lists a Roof Plan among the construction documents for a permit application. It does not address reroofing specifically, and the City's Residential Required Submittal Documents List was not read.
Adopted code
The City's Building and Design Criteria sheet lists these DESIGN CODES: "2024 International Building Code," "2024 International Residential Code," 2024 International Mechanical Code, 2024 International Plumbing Code, 2024 International Fire Code, 2024 International Fuel Gas Code, 2024 International Property Maintenance Code, 2024 International Existing Building Code and "2023 National Electric Code." The Building Department page links an "Adopted Building Codes Ordinance and Amendments" document (Ordinance 1007); that file is a scanned image and was not read, so this record gives no answer that depends on a local amendment.
Ice & water shield
Required — The City's Building and Design Criteria sheet design table has an "Ice Barrier Required" column showing "YES" beside the 60 PSF ground snow load and a winter design temperature of 4 degrees F. About ice & water barrier
Wind design criteria
The City's Building and Design Criteria sheet prints the residential values: "Roof Load Design: 40 PSF," "Ground Snow Load: 60 PSF," "Wind Speed (3 second gust): 105 MPH," "Seismic Design Category: C," "Frost Line: 30" Below Finish Grade" and "Exposures: B, C (contact Building Dept. to confirm)." Its wind-design table lists topographic effects "NO," special wind region "NO," and windborne debris zone "NO."
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 6.90% for Coconino County (the 5.6% state rate plus the county rate) and at 3.50% for the City of Williams (city code WL), a combined 10.40%. 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 10.40% 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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Sources

Roofing questions: Williams, AZ

Is ice & water shield required in Williams, AZ?

Yes. The City's Building and Design Criteria sheet design table has an "Ice Barrier Required" column showing "YES" beside the 60 PSF ground snow load and a winter design temperature of 4 degrees F.

Do roofing contractors need a license or registration in Williams, AZ?

Yes. STATE LAYER, applies in Williams 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." The City's Building Department page links a Builder / Contractor Information Form, which was not read. The specific roofing classification codes and the Registrar's own licensing page were not read for this record.

What building code does Williams, AZ use?

The City's Building and Design Criteria sheet lists these DESIGN CODES: "2024 International Building Code," "2024 International Residential Code," 2024 International Mechanical Code, 2024 International Plumbing Code, 2024 International Fire Code, 2024 International Fuel Gas Code, 2024 International Property Maintenance Code, 2024 International Existing Building Code and "2023 National Electric Code." The Building Department page links an "Adopted Building Codes Ordinance and Amendments" document (Ordinance 1007); that file is a scanned image and was not read, so this record gives no answer that depends on a local amendment.