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Water Heater Permit in Boise, Idaho

Required for water heater installation or replacement in Boise, issued as a Residential Plumbing Permit (420). A water heater is a single-fixture installation per the Boise Plumbing Code Fee Schedule.

Verified 2026-07-16 · Source

When you need this permit

  • Water heater replacement (any fuel type — gas, electric, heat pump)
  • New water heater installation
  • Homeowner may self-permit on their own primary or secondary residence per Idaho statute
  • Note: Gas piping modifications for a new water heater require a Mechanical Permit (422)

Required documents

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Fee schedule

Water Heater Replacement — single fixture plumbing permitBoise Plumbing Code Fee Schedule, Table B(3): 'Installation of single fixtures or appliances including...hot water heaters...etc. — $55'
$55

Review timeline

Plan reviewTypical estimate — confirm current times with the Boise building department
~1–3 business days

How long did your Water Heater Permit permit actually take in Boise?

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

Inspection process

  1. 1

    Final

    Verify proper installation, venting (for gas units), T&P valve discharge, and connections

See the full Boise inspection guide — scheduling & re-inspection fees →

Tips

  • The water heater permit in Boise is a $55 single-fixture plumbing permit — one of the least expensive permits to obtain.
  • Idaho state law allows homeowners to pull their own water heater permit on their primary or secondary residence.
  • Boise's Water Heater Installation Guide (June 2025 update) is available on the 420 permit page — review it before scheduling.
  • If gas piping must be modified for a new tankless water heater, a separate Mechanical Permit (422, $55) is also required.

Frequently asked questions

Yes. A Plumbing Permit (420) is required for all water heater replacements in Boise. The fee is $55 per the Boise Plumbing Code Fee Schedule, Table B(3). Homeowners may pull their own permit.

In Boise, the published Water Heater Replacement — single fixture plumbing permit is: $55. These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.

Plan review for a water heater permit in Boise typically runs 1–3 business days. This is an estimate, not a published figure — confirm current review times with Boise Planning and Development Services — Building Division at (208) 608-7070.

You'll need: Plumbing Permit Application (420). Depending on your project, Boise may also ask for: Water Heater Installation Guide. See the required-documents checklist on this page for details on each.

Boise requires 1 inspection(s) for a water heater permit, in order: Final. Schedule each through Boise Planning and Development Services — Building Division ((208) 608-7070).

Apply through Boise Planning and Development Services — Building Division at 150 N Capitol Blvd, Boise, ID 83702. Phone: (208) 608-7070, email: permits@cityofboise.org. Office hours: Mon–Fri 8:00 AM – 5:00 PM (closed holidays). Official information: https://www.cityofboise.org/departments/planning-and-development-services/building/.

Boise, Idaho has adopted: 2018 International Building Code (IBC) — with Appendices H (Signs) and J (Grading); Mass Timber provisions only of the 2021 IBC; 2018 International Existing Building Code (IEBC); 2018 International Residential Code (IRC), Parts I–IV and IX — with Appendices Q (Tiny Houses) and S (Strawbale Construction); 2018 International Energy Conservation Code (IECC); 2017 Idaho State Plumbing Code (based on the 2015 Uniform Plumbing Code, including Chapter 13 – Medical Gas); 2023 National Electrical Code (NEC) — effective April 26, 2024; 2018 International Fire Code (IFC) — with Appendices B, C, D, F and L; 2019 NFPA 13; 2019 NFPA 72; 2018 International Mechanical Code (IMC) — commercial and residential projects with 3+ units; 2018 International Fuel Gas Code (IFGC) — commercial and residential projects with 3+ units; 2018 IRC Parts V and VI — single- and two-family residential mechanical and fuel gas. Local amendments apply — see the Boise overview page for the full list.

Sources & verification

Verified against official sources. Last reviewed 2026-07-16.

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 Boise building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.

Other permits in Boise

Residential Building Permit (New Construction)Residential Addition / Alteration PermitResidential Electrical PermitEV Charger / EVSE Installation PermitResidential Plumbing PermitResidential Mechanical / HVAC PermitResidential Roofing PermitSolar Photovoltaic (PV) PermitAccessory Dwelling Unit (ADU) PermitNew Commercial Building and Commercial Additions Permit (502)Tenant Improvement Permit — Minor (518) and Major (520)

Water Heater Permit in other cities

Bountiful, UtahDraper, UtahHerriman, UtahLayton, UtahLogan, UtahMillcreek, UtahOgden, UtahSalt Lake City, Utah

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