Flagstaff building permits
VerifiedDepartment contacts, adopted codes, permit types, fees, and gotchas for Flagstaff, Arizona.
Last verified 2026-07-03 · Source
Building department
- Address
- 211 W Aspen Avenue, Flagstaff, AZ 86001
- Phone
- 928-213-2000
- Office hours
- City Hall is open 8:00 am to 4:30 pm. Commercial permit attachments too large for the portal: Commercial.BuildingPermits@flagstaffaz.gov. Inter-departmental submittals: FrontCounter@flagstaffaz.gov.
- Website
- Official site
Codes adopted
Arizona has no statewide building code for non-state buildings; codes are adopted locally. According to the International Code Council, codes are adopted locally in Arizona and are predominantly the I-codes, with different cities and counties choosing their own editions and local amendments. The Arizona State Fire Code (adopting the 2018 IFC) applies only to state and county buildings, public and private schools, and non-residential occupancies in areas without a locally adopted fire code — it does not establish a statewide residential or commercial building code floor. Each city and county adopts its own code editions independently, resulting in different I-Code years and amendment sets across jurisdictions. There is no state-mandated minimum edition; enforcement is entirely local. Always confirm the adopted edition and any local amendments with the specific jurisdiction before submitting plans.
Permit types & fees
Residential Building Permit (New Construction)
Required for construction of new single-family and two-family dwellings in Flagstaff. Reviewed against the 2018 IRC and 2018 IECC as adopted by the City of Flagstaff (Resolution 2019-26 / Ordinance 2019-16), plus City of Flagstaff Building Design Criteria amendments (60 psf snow load, 115 mph wind, Seismic Category C). Applications are submitted through the Citizen Access Portal.
Residential Addition / Remodel / Alteration Permit
Required for additions, remodels, and structural alterations to existing one- and two-family dwellings in Flagstaff, including decks over 30 inches high or over 200 sq ft, garages, and interior remodels affecting structural or life-safety elements. Reviewed against the 2018 IRC as adopted by the City of Flagstaff. Apply through the Citizen Access Portal.
Electrical Permit
Required for electrical installation, alteration, or repair work in Flagstaff, governed by the 2017 NFPA 70 / National Electrical Code (NEC) as adopted and locally amended by the City of Flagstaff (copper-only conductors; EV-charging circuit requirement for new 1-2 family garages). Minor electrical work (service entrance/subpanel upgrades, circuits) can use the Over-the-Counter permit; larger work requires a full Building Permit.
Plumbing Permit
Required for plumbing installation, alteration, or repair work in Flagstaff, governed by the 2018 International Plumbing Code (IPC) as adopted and locally amended by the City of Flagstaff (max 1.3-gallon flush water closets; 12-inch minimum roof vent termination above grade). Minor plumbing work can use the Over-the-Counter permit.
Mechanical / HVAC Permit
Required for heating, ventilation, air conditioning, and related mechanical installations in Flagstaff, governed by the 2018 International Mechanical Code (IMC) and International Fuel Gas Code (IFGC) as adopted by the City of Flagstaff. Minor mechanical work can use the Over-the-Counter permit; rooftop unit replacements on structures over 50 years old or in historic overlay areas are routed to Current Planning for review.
Re-Roofing Permit
Required for residential and commercial re-roofing in Flagstaff. Governed by IRC R905.2.7.1 / IBC 1507.2.8.2 (ice barrier) as adopted, plus City of Flagstaff amendments requiring Class A/B fire-rated roofing and prohibiting wood shakes/shingles. Uses the Over-the-Counter permit for standard re-roofs.
Solar Photovoltaic (PV) Permit
Required for installation of rooftop or ground-mount solar photovoltaic systems in Flagstaff. The City has no separate solar-specific permit type or fee schedule: a PV system is permitted and billed as a standard Building Permit (plus Electrical Permit for wiring) under the City's valuation-based fee methodology (Resolution 2017-21), and mounting-system structural design is governed by the City's general Building Design Criteria (60 psf ground snow load, 115 mph wind, Seismic Design Category C). Process/documentation limits and timeline protections are set by the statewide overlay, Arizona Revised Statutes Section 9-468, which caps required documentation, limits professional-engineer stamp requirements, and caps solar permit fees at the actual cost of issuance. The 2018 International Solar Energy Provisions (ISEP) are adopted as part of the City's 2018 code suite.
Demolition Permit
Required for demolition of a building within Flagstaff. Uses the standard Residential or Commercial Building Permit Application with a completed Demolition Questionnaire covering asbestos/NESHAP screening.
Fence and Retaining Wall Permit (Minor Improvement Permit)
Fences and retaining walls in Flagstaff are regulated by height, with most fences and shorter retaining walls handled via a Zoning-issued Minor Improvement Permit ($80 flat fee) rather than a full Building Permit.
New residential construction activity
New privately-owned residential construction onlyHousing units authorized by building permits for new privately-owned residential construction — this is not total permit volume (no commercial permits or remodels).
- Latest month (2026-05)
- 16units
16 buildings · $7M valuation
- Trailing 12 months
- 336units
11 of 12 months reported · #13 in Arizona coverage by units
- Year to date (2026 YTD through 2026-05)
- 132units
132 buildings · $55.8M valuation
5 month(s) reported to Census
- Full year 2025
- 485units
293 buildings · $136.7M valuation
Source: U.S. Census Bureau, Building Permits Survey (BPS), 2026-05 vintage. Census survey data — separate from the permit-requirements verification above. All Arizona building activity
Tips & gotchas
- Arizona has no mandatory statewide building code — the City of Flagstaff independently adopts and amends its own codes (currently the 2018 Suite of Codes, adopted by Resolution 2019-26 / Ordinance 2019-16, effective July 19, 2019), separate from Coconino County's building department, which covers unincorporated areas outside city limits.
- Flagstaff Building Design Criteria (2018 IRC Table R301.2(1) as amended): 60 psf ground snow load, 115 mph wind design speed, Seismic Design Category C, 30-inch frost line depth, required ice barrier underlayment, winter design temperature 4 degrees F.
- Building/plan-review fees use the February 2017 ICC Building Valuation Data methodology: Gross Area x Square Foot Construction Cost x 0.01 permit fee multiplier, with plan review set at 65% of the building permit fee, per Resolution 2017-21 (effective August 1, 2017).
- Minor plumbing, mechanical, electrical, and roofing work can use the Over-the-Counter (OTC) Permit Application (Rev. 06/10/2025) with itemized flat fees (base fee $29.90 for plumbing/mechanical/electrical) instead of the full Building Permit process; OTC cannot be used for any structural work.
- Fences up to 7 feet and retaining walls up to 4 feet use a Zoning-issued Minor Improvement Permit ($80 flat fee), not a Building Permit; taller structures require a full Building Permit and, for fences over 6 feet, a zoning variance.
- Notable local code amendments: copper-only current-carrying conductors (aluminum allowed only for feeders/service-entrance); new 1-2 family garages require a dedicated 208/240V 50-amp EV charging circuit; water closets capped at 1.3-gallon max flush; wood shake/shingle roofing prohibited citywide (Class A/B fire-rated roofing required).
- Arizona Revised Statutes Section 9-468 imposes statewide limits on solar PV permitting (documentation requirements, PE stamp restrictions, fee-must-not-exceed-cost rule) that bind the City of Flagstaff as a municipality.
- Residential Building Permit statutory review timeframes (per ARS 9-835/9-836, implemented by the City): Small Residential Plans (additions, garages, decks, remodels, sheds >200 sf, etc.) = 35 working days overall; New Single-Family or Two-Family Dwelling = 45 working days overall; Revisions to approved plans = 20 working days overall.
- Accessory Dwelling Units (ADUs) are defined by reference to Flagstaff City Code Title 10 (Zoning Code) — no separate ADU permit type is published by Building Safety; ADU construction uses the standard Residential Building Permit subject to Zoning Code Title 10 standards.
- Work exempt from a Building Permit includes: one-story detached sheds/accessory structures up to 200 sq ft, fences up to 7 feet, retaining walls up to 4 feet (absent surcharge/liquid impoundment), sidewalks/driveways up to 30 inches above grade, and various finish work — though several of these still require a Zoning/Minor Improvement Permit.
- Commercial Building Permits are valid up to 730 days (with a possible 365-day extension, then a second extension at half the original fee); permits not passing final inspection within 1,095 days expire. Commercial Over-the-Counter permits are valid up to 180 days.
- Rooftop HVAC unit replacements on structures over 50 years old or in a historic overlay area require a full Building Permit routed to Current Planning, not the Over-the-Counter process.