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Plumbing / Mechanical Permit in Unincorporated Mohave County, Arizona

Required for plumbing and mechanical (HVAC, gas appliance) installations in unincorporated Mohave County under the 2018 IPC/IMC/IFGC as adopted by Ordinance 2021-03. Gas piping systems and plumbing/electrical systems in accessory structures are only permitted where the structure has a permanent foundation. A dedicated gas-line inspection line is available.

Verified 2026-07-23 · Source

When you need this permit

  • Plumbing permit required under the 2018 IPC (Ordinance 2021-03); mechanical permit required under the 2018 IMC/IFGC
  • Gas line inspection required — call 928-757-0904 to schedule
  • Plumbing and gas piping systems are only allowed in structures with PERMANENT foundations; auger-type tie-downs do not qualify as permanent foundations
  • Separate plumbing/mechanical permits not required for one- and two-family residential construction if included on the approved building-permit plans

Required documents

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Fee schedule

Plumbing Permit Issuance Fee (plus unit fees below)Mohave County Fee Schedule (Ordinance 2018-02, Rev. 11/01/22)
$39.00
Each plumbing fixture or set of fixtures on one trapMohave County Fee Schedule, Unit Fee Schedule
$9.10
Each gas-piping system / hazard process piping systemMohave County Fee Schedule, Unit Fee Schedule
$6.50
Mechanical Permit Issuance Fee (plus unit fees below)Mohave County Fee Schedule (Ordinance 2018-02, Rev. 11/01/22)
$39.00
Forced-air/gravity furnace installation up to 100,000 Btu/hMohave County Fee Schedule, Unit Fee Schedule
$16.00
Evaporative cooler (other than portable)Mohave County Fee Schedule, Unit Fee Schedule
$11.00

Review timeline

Plan review
Not published — contact the department

How long did your Plumbing / Mechanical Permit permit actually take in Unincorporated Mohave County?

Anonymous — one question, no email. Answers are combined and only shown once at least 5 people have reported.

Inspection process

  1. 1

    Rough-In

    Piping/ductwork/equipment installed before concealment; gas piping pressure-tested before concealing per 2018 IFGC

  2. 2

    Final

    All plumbing/mechanical work complete and operational per 2018 IPC/IMC/IFGC

See the full Unincorporated Mohave County inspection guide — scheduling & re-inspection fees →

Tips

  • Call the dedicated gas-line inspection number (928-757-0904) directly to schedule gas piping inspections rather than the main Building Division line.
  • If you're installing plumbing, gas, or electrical service in an accessory structure, verify it sits on a genuine permanent foundation first — auger-type tie-down anchoring does not qualify, and the county will not permit these systems in a structure anchored that way.

Frequently asked questions

Unincorporated Mohave County requires a plumbing / mechanical permit for: Plumbing permit required under the 2018 IPC (Ordinance 2021-03); mechanical permit required under the 2018 IMC/IFGC; Gas line inspection required — call 928-757-0904 to schedule; Plumbing and gas piping systems are only allowed in structures with PERMANENT foundations; auger-type tie-downs do not qualify as permanent foundations; Separate plumbing/mechanical permits not required for one- and two-family residential construction if included on the approved building-permit plans. If your project isn't listed, confirm with Mohave County Development Services Department — Building Division at 928-757-0903 before starting work.

In Unincorporated Mohave County, the published Plumbing Permit Issuance Fee (plus unit fees below) is: $39.00. Additional published fees: Each plumbing fixture or set of fixtures on one trap — $9.10; Each gas-piping system / hazard process piping system — $6.50; Mechanical Permit Issuance Fee (plus unit fees below) — $39.00; Forced-air/gravity furnace installation up to 100,000 Btu/h — $16.00; Evaporative cooler (other than portable) — $11.00. These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.

Unincorporated Mohave County does not publish a plan-review timeline for this permit. Contact Mohave County Development Services Department — Building Division at 928-757-0903 for current turnaround.

You'll need: Building Permit Application Packet (PDF). See the required-documents checklist on this page for details on each.

Unincorporated Mohave County requires 2 inspection(s) for a plumbing / mechanical permit, in order: Rough-In, Final. Schedule each through Mohave County Development Services Department — Building Division (928-757-0903).

Apply through Mohave County Development Services Department — Building Division at 3250 E. Kino Avenue, Kingman, AZ 86409 (mailing: PO Box 7000, Kingman, AZ 86402-7000). Phone: 928-757-0903. Office hours: Mon–Fri 7:00 AM – 6:00 PM, closed County-designated holidays. Development Services Director: Scott Holtry. Chief Building Official: Trevor Bies. Contact form at https://forms.mohave.gov/Departments/Contact-Development-Services. Note: the Development Services/Building Division office is physically located at 3250 E. Kino Avenue — distinct from the Mohave County Administration Building at 700 W. Beale Street, which houses the Board of Supervisors and other county offices; both addresses appear in county materials and were independently cross-checked to confirm the Building Division's own location.. Official information: https://www.mohave.gov/departments/development-services/building-division/.

Unincorporated Mohave County, Arizona has adopted: 2018 International Building Code (IBC) — adopted by Mohave County Ordinance No. 2021-03 (June 7, 2021), amended through July 15, 2024, for the unincorporated areas of the county per Resolution 2007-249 (adopted May 7, 2007); 2018 International Residential Code (IRC) — adopted by Ordinance 2021-03, with Appendices C, E, G, H, J, M, O, P, and Q (Tiny Houses); 2018 International Fire Code (IFC) — adopted by Ordinance 2021-03; 2018 International Mechanical Code (IMC) — adopted by Ordinance 2021-03; 2018 International Plumbing Code (IPC) — adopted by Ordinance 2021-03; 2017 National Electrical Code (NEC), N.F.P.A. 70 — adopted by Ordinance 2021-03; 2018 International Fuel Gas Code (IFGC) — adopted by Ordinance 2021-03; 2018 International Existing Building Code (IEBC) — adopted by Ordinance 2021-03, with Appendix A (Seismic Retrofit Guidelines); 2018 International Property Maintenance Code (IPMC) — adopted by Ordinance 2021-03, with Appendix A (Boarding Standard); 2018 International Swimming Pool and Spa Code (ISPSC) — adopted by Ordinance 2021-03, with Arizona-specific barrier amendments citing A.R.S. § 36-1681; 2018 International Energy Conservation Code (IECC) — adopted by Ordinance 2021-03; residential energy provisions are NOT taken from IECC but instead from IRC Chapter 11 (RE) Energy Efficiency, 2018 Edition. Local amendments apply — see the Unincorporated Mohave County overview page for the full list.

No. Mohave County's local IRC/IFGC amendments (Sections G2415.3, P2601.4, E3601.2.1) explicitly restrict plumbing, gas piping, and electrical systems to structures with permanent foundations — auger-type tie-downs or similar anchoring devices are not considered permanent foundations. Source: Mohave County Building Ordinance 2021-03, https://www.mohave.gov/media/l4npv02v/2021-03-amended-thru-07-15-24.pdf

Sources & verification

Verified against official sources. Last reviewed 2026-07-23.

Fees, timelines, and adopted codes are researched from each jurisdiction's published records — see how we verify. Requirements change and vary by project, so always confirm the current details with the Unincorporated Mohave County building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.

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