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 2026-06-29 · 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
- Req
Plumbing Permit Application (420)
Boise PDS plumbing permit application; available at permits.cityofboise.org
- Opt
Water Heater Installation Guide
Boise-specific guide (updated June 2025) available from the 420 permit page — review before installation
Fee schedule
| Fee type | Amount | Notes |
|---|---|---|
| Water Heater Replacement — single fixture plumbing permit | $55 | Boise Plumbing Code Fee Schedule, Table B(3): 'Installation of single fixtures or appliances including...hot water heaters...etc. — $55' |
Review timeline
~1–3 business days
Typical estimate — confirm current times with the Boise building department
Inspection process
- 1
Final
Verify proper installation, venting (for gas units), T&P valve discharge, and connections
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
- Do I need a permit to replace a water heater in Boise?
- 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.
Sources & verification
Verified against official sources. Last reviewed 2026-06-29.
- Boise Planning and Development Services — Building Division — official building department
- 420 — Residential Plumbing | City of Boise
- Boise City Plumbing Code Fee Schedule (Oct 2021) — Table B(3)
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.
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