Plumbing permit — Mountlake Terrace, Washington · Requirements sheet
Verified 2026-09-16 · Source: https://ecode360.com/48217328
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 Mountlake Terrace, Washington
Permit for plumbing installation, alteration, repair, conversion or replacement in Mountlake Terrace, under the Uniform Plumbing Code adopted at MTMC 15.05.090.
Verified 2026-09-16 · Source
When you need this permit
- MTMC 15.05.030(E) adopts the “Uniform Plumbing Code, 2021 Edition, with state of Washington amendments, and Uniform Plumbing Code Standards, published by the International Association of Plumbing and Mechanical Officials”; MTMC 15.05.090 adopts the same year.
- Washington is a Uniform Plumbing Code state rather than an International Plumbing Code state, and Mountlake Terrace adopts the UPC together with the separately published UPC Standards.
- MTMC 15.05.210 requires a permit before any plumbing system is erected, installed, enlarged, altered, repaired, converted or replaced.
- Plumbing permit and plan check fees are adjusted annually on building valuation data under MTMC 3.150.090(D).
Required documents
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Fee schedule
No dollar figure is published in the municipal code. Show full citationHide
No dollar figure is published in the municipal code. MTMC 15.05.220(A) says permit fees “are established pursuant to MTMC § 3.150.090”, and 3.150.090 sets a mechanism rather than an amount: schedules “shall be established annually”, fees “shall be based upon a cost of service study completed every three years”, and they are “adjusted annually, based on the Seattle Area Consumer Price Index (CPI)” for All Urban Consumers over one 12-month period. Building, plumbing, mechanical and electrical permit and plan check fees are separately “adjusted annually based upon building valuation data or otherwise recognized sources”. Ask the city for the current schedule; it is not derivable from the code.Review timeline
Inspection process
Tips
- The adoption covers the Uniform Plumbing Code Standards as a separate publication alongside the code itself, so a submittal that satisfies the UPC alone may still be short of what is adopted here.
Frequently asked questions
Sources & verification
Verified against official sources. Last reviewed 2026-09-16.
Fee schedules
Codes & ordinances
Department & other records
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 Mountlake Terrace building department before you submit. PermitBase is an independent reference and is not affiliated with any government agency.
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This page covers what the permit requires. What we don't have for Mountlake Terrace yet is the record of permits actually issued — the history you'd search by street address. That is a gap in our coverage, not a statement about any particular property.
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