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Plumbing Permit — Lewiston, Idaho · Requirements sheet
Verified 2026-07-04 · Source: https://www.cityoflewiston.org/254/Permits-Needed
PermitBase is an independent reference and is not affiliated with any government agency. Requirements change and vary by project — confirm current details with the building department before you submit.
Plumbing Permit in Lewiston, Idaho
Required for all residential and commercial interior and exterior piping work in the City of Lewiston, per the adopted Idaho State Plumbing Code (based on the 2015 UPC). Issued by City of Lewiston Building Services.
Verified 2026-07-04 · Source
When you need this permit
- Required for all residential and commercial interior and exterior piping — City of Lewiston Permits Needed page
- Compliance with the Idaho State Plumbing Code (based on 2015 UPC) as adopted by the City of Lewiston (January 2021)
Required documents
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Fee schedule
New Single Family Dwelling (up to 1,500 sq ft)City of Lewiston FY2026 Fee Schedule, Schedule F, Plumbing Permit Fees.
$216.56, plus $72.20 for each additional 1,000 sq ft or portion thereof
New DuplexCity of Lewiston FY2026 Fee Schedule.
$433.11
Existing Residence (one fixture included) / Detached ShopCity of Lewiston FY2026 Fee Schedule.
$72.20, plus $11.10 for each additional fixture, up to the maximum of the corresponding square footage fee
Sewer Line / Water LineCity of Lewiston FY2026 Fee Schedule.
$72.20 each
Sewer and Water Line (if inspected at the same time)City of Lewiston FY2026 Fee Schedule.
$72.20
Sewer Turnaround / Domestic Water (change from septic to City, water re-piper under house)City of Lewiston FY2026 Fee Schedule.
$72.20
Lawn SprinklersCity of Lewiston FY2026 Fee Schedule.
$72.20
Modular, Manufactured, or Mobile Homes (sewer and water stub connections)City of Lewiston FY2026 Fee Schedule.
$72.20
Commercial, Multi-family (3+ units), Industrial, Alternative Energy — valuation up to $10,000City of Lewiston FY2026 Fee Schedule.
$66.63 plus valuation x 0.032
Commercial, Multi-family (3+ units), Industrial, Alternative Energy — valuation $10,001 to $100,000City of Lewiston FY2026 Fee Schedule.
$288.74 plus (valuation - $10,000) x 0.028
Commercial, Multi-family (3+ units), Industrial, Alternative Energy — valuation $100,001 and upCity of Lewiston FY2026 Fee Schedule.
$1,288.24 plus (valuation - $100,000) x 0.015
Plumbing Plan Review FeeCity of Lewiston FY2026 Fee Schedule (the fee schedule labels this line's percentage basis as 'mechanical permit fee' verbatim in the Plumbing Permit Fees section).
$39.77 or 25% of the mechanical permit fee, whichever is greater
Review timeline
Plan reviewLewiston’s published plan-review target
8–14 business days
Inspection process
- 1
Underground/Rough-In
Pipe slope, materials, and cleanouts verified before walls/slab closed.
- 2
Final
Final plumbing inspection.
See the full Lewiston inspection guide — scheduling & re-inspection fees →
Tips
- Water/sewer line work, sprinkler systems, and modular home stub connections are each billed at the same flat $72.20 rate in the Lewiston fee schedule.
Frequently asked questions
Lewiston requires a plumbing permit for: Required for all residential and commercial interior and exterior piping — City of Lewiston Permits Needed page; Compliance with the Idaho State Plumbing Code (based on 2015 UPC) as adopted by the City of Lewiston (January 2021). If your project isn't listed, confirm with City of Lewiston Building Services (Community Development Department) at (208) 746-1318, option 1 for Permit Representatives before starting work.
In Lewiston, the published New Single Family Dwelling (up to 1,500 sq ft) is: $216.56, plus $72.20 for each additional 1,000 sq ft or portion thereof. Additional published fees: New Duplex — $433.11; Existing Residence (one fixture included) / Detached Shop — $72.20, plus $11.10 for each additional fixture, up to the maximum of the corresponding square footage fee; Sewer Line / Water Line — $72.20 each; Sewer and Water Line (if inspected at the same time) — $72.20; Sewer Turnaround / Domestic Water (change from septic to City, water re-piper under house) — $72.20; Lawn Sprinklers — $72.20; Modular, Manufactured, or Mobile Homes (sewer and water stub connections) — $72.20; Commercial, Multi-family (3+ units), Industrial, Alternative Energy — valuation up to $10,000 — $66.63 plus valuation x 0.032; Commercial, Multi-family (3+ units), Industrial, Alternative Energy — valuation $10,001 to $100,000 — $288.74 plus (valuation - $10,000) x 0.028; Commercial, Multi-family (3+ units), Industrial, Alternative Energy — valuation $100,001 and up — $1,288.24 plus (valuation - $100,000) x 0.015; Plumbing Plan Review Fee — $39.77 or 25% of the mechanical permit fee, whichever is greater. These are the jurisdiction's own published figures — see the fee schedule table and source citations on this page.
Lewiston's published plan-review target for a plumbing permit is 8–14 business days.
You'll need: Plumbing Permit Application. See the required-documents checklist on this page for details on each.
Lewiston requires 2 inspection(s) for a plumbing permit, in order: Underground/Rough-In, Final. Schedule each through City of Lewiston Building Services (Community Development Department) ((208) 746-1318, option 1 for Permit Representatives).
Apply through City of Lewiston Building Services (Community Development Department) at 215 D Street, Lewiston, ID 83501 (P.O. Box 617, Lewiston, ID 83501). Phone: (208) 746-1318, option 1 for Permit Representatives, email: cd@cityoflewiston.org. Office hours: Monday-Friday, 8:00 AM to 5:00 PM. Building Official: Jeff Wolfe, (509) 254-3275, jwolfe@cityoflewiston.org. Permit Representatives: Lorrie Tanguay, (208) 746-1318 ext. 7203; Adrian Miller, (208) 746-1318 ext. 7263.. Official information: https://www.cityoflewiston.org/227/Building-Services.
Lewiston, Idaho has adopted: 2018 International Building Code (IBC), plus 2021 IBC Mass Timber provisions, adopted January 2025 for commercial construction — City of Lewiston Current Codes page (Lewiston City Code Sec. 10-1, Code Adoption).; 2018 International Residential Code (IRC), adopted January 2021, for one- and two-family dwellings and townhouses — City of Lewiston Current Codes page.; 2018 International Energy Conservation Code (IECC), adopted January 2021 — City of Lewiston Current Codes page.; 2018 International Mechanical Code (IMC), adopted January 2021 — City of Lewiston Current Codes page.; Idaho State Plumbing Code, based on the 2015 Uniform Plumbing Code (UPC), adopted January 2021 — City of Lewiston Current Codes page.; 2018 International Fire Code (IFC), adopted January 2021 — City of Lewiston Current Codes page.; 2023 National Electrical Code (NEC), adopted January 2025 — City of Lewiston Current Codes page.; 2018 International Existing Building Code (IEBC), adopted January 2021 — City of Lewiston Current Codes page.; The Current Codes page states local amendments to the adopted codes exist and directs readers to Lewiston City Code Sec. 10-1 (Code Adoption) for the specific amendment text; the amendments themselves are not individually enumerated on the Current Codes web page.. Local amendments apply — see the Lewiston overview page for the full list.
The City of Lewiston adopted the Idaho State Plumbing Code, based on the 2015 Uniform Plumbing Code (UPC), in January 2021, per the City's Current Codes page.
Sources & verification
Verified against official sources. Last reviewed 2026-07-04.
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 Lewiston building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.
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