Mechanical / HVAC Permit in Unincorporated Coconino County, Arizona

Unincorporated Coconino County requires a mechanical / hvac permit for: Required for installation, replacement, or relocation of HVAC equipment, furnaces, and ventilation systems in unincorporated Coconino County; Governed by the 2018 IMC and 2018 IFGC as adopted by County Ordinance 2019-10; Apply online through the SmartGov portal (co-coconino-az.smartgovcommunity.com); Like-for-like unit replacement may qualify for the county's Residential Self-Issue Permit track. If your project isn't listed, confirm with Coconino County Community Development Department, Building and Safety Division at 928-679-8850 (toll-free 800-559-9289); fax 928-679-8851 before starting work.

In Unincorporated Coconino County, the published Fee to issue mechanical permit is: $50.00 base. Additional published fees: Forced air or gravity furnace unit heater (up to 100,000 BTU/h / over 100,000 BTU/h) — $9.00 each / $11.00 each (per Table IV tiers); Evaporative cooler (controls only, no ducts/grilles) — $6.50 each (per Table IV structure); Plan Review Fee (where full plan review is required) — 65% of the calculated permit fee. These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.

Unincorporated Coconino County's published plan-review target for a mechanical / hvac permit is 36–56 business days.

You'll need: Online Permit Applications Portal Submission. See the required-documents checklist on this page for details on each.

Unincorporated Coconino County requires 2 inspection(s) for a mechanical / hvac permit, in order: Rough-In / Equipment, Final. Schedule each through Coconino County Community Development Department, Building and Safety Division (928-679-8850 (toll-free 800-559-9289); fax 928-679-8851).

Apply through Coconino County Community Development Department, Building and Safety Division at 2500 N. Fort Valley Road, Building 1, Flagstaff, AZ 86001-1287. Phone: 928-679-8850 (toll-free 800-559-9289); fax 928-679-8851, email: plansubmittals@coconino.az.gov. Office hours: Monday-Friday, 8:00 a.m.-5:00 p.m. Director: Jay Christelman; Assistant Director: Jess McNeely. All building permit applications and document submittals for unincorporated Coconino County are made online through the Online Permit Applications portal (co-coconino-az.smartgovcommunity.com); only PDF files are accepted for plan review submittals.. Official information: https://www.coconino.az.gov/624/Building-and-Safety.

Unincorporated Coconino County, Arizona has adopted: Arizona has NO statewide mandatory building code floor for general construction — code adoption is a per-city/county authority under state enabling statutes (A.R.S. Title 11 for counties). Coconino County Community Development Department, Building and Safety Division, is the code enforcement agency and building official for all unincorporated areas of the county (areas outside Flagstaff, Page, Fredonia, Tusayan, and Williams, and outside the Coconino County portion of Sedona).; As of this record's verification date (July 2026), the Coconino County Building Division's current adopted codes are: 2018 International Residential Code (IRC); 2018 International Building Code (IBC); 2018 International Mechanical Code (IMC); 2018 International Fuel Gas Code (IFGC); 2018 International Plumbing Code (IPC); 2018 International Energy Conservation Code (IECC); 2018 International Existing Building Code (IEBC); and 2017 National Electrical Code (NEC). Adopted via County Ordinance 2019-10 ('2019-10 Coconino County Building Ordinance — adopting the 2018 Suite of Building Codes with Amendments'). Source: Coconino County Building Codes, Ordinances, Design Criteria page (coconino.az.gov/2391/Building-Codes-Ordinances-Design-Criteri), 'Current Codes and Ordinances' section, rendered/read directly July 2026.; Every six years the Community Development Department, in partnership with the Building Safety Advisory Board (BSAB), leads a process to adopt updated codes. As of this record's date, the County has begun a public process toward adopting the 2024 ICC code suite and 2023 NEC — an open house was held March 23, 2026 at 2500 N. Fort Valley Rd. (Thomas Auditorium), and a slide deck covering the 2024 IECC, IBC, IPC, IMC, IFGC and 2023 NEC changes was presented — but as of this record's lastVerified date that update had NOT yet been formally adopted. The 2018 ICC / 2017 NEC baseline remains the current, controlling code. Source: Coconino County Building Codes, Ordinances, Design Criteria page, 'Building Code Adoption' section.; Additional adopted county ordinances/codes beyond the base ICC/NEC suite: Potable Rainwater Collection and Distribution Systems Code (an amendment to the IRC); 2020-11 Earthen Building and Construction Ordinance (regulating quality, type of material, testing, and workmanship for earthen buildings/structures). Source: Coconino County Building Codes, Ordinances, Design Criteria page.; The Innovative Materials and Systems Pilot Program (part of the 2019-10 Ordinance) allows owner-builders to seek an exemption from standard adopted-code provisions when building with alternative methods and materials, under conditions evaluated by the Building Official — administered in coordination with the County's broader 'Building with Alternative Methods and Materials' / Alternative Methods and Materials Permit Program (ATAG certification and consultation process) run out of the Community Development Department. Source: Coconino County Building Codes, Ordinances, Design Criteria page; Coconino County Community Development page (coconino.az.gov/136/Community-Development), 'Building with Alternative Methods and Materials' section.; Manufactured homes and factory-built buildings follow a joint state/local structure: the Arizona Department of Fire, Building and Life Safety (Office of Manufactured Housing) sets manufacturer/installer/retailer licensing and issues state-level installation permits, while local site/foundation/utility compliance is handled by Coconino County under a dedicated Manufactured Homes and Factory Built Building Permit fee schedule (Part III of the county's Building Permitting Fees) and a 7-business-day review ceiling under the county's own timeframes policy. Source: Coconino County Online Permit Applications page (coconino.az.gov/2390/Online-Permit-Applications), 'Manufactured Homes & Factory Built Projects' section; Coconino County Building Permitting Fees schedule, Part III.; Properties within the Sedona Fire District (including Oak Creek Canyon) are additionally subject to the 2018 Wildland and Urban Interface Codes as adopted by that fire district; fire suppression systems are required in addition to Wildland-Urban-Interface-code compliance, and the Sedona Fire Marshal conducts concurrent plan reviews with Coconino County to ensure compliance. Source: Coconino County Building Codes, Ordinances, Design Criteria page, 'Building Within the Sedona Fire District' section.. Local amendments apply — see the Unincorporated Coconino County overview page for the full list.

The 2018 International Mechanical Code (IMC) and 2018 International Fuel Gas Code (IFGC), as adopted by County Ordinance 2019-10, as of this record's verification date. Source: https://www.coconino.az.gov/2391/Building-Codes-Ordinances-Design-Criteri