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Plumbing and gas piping
Short URL: kingcounty.gov/plumbing
The Environmental Health Services Division has launched a new permitting system! Create your account now and learn more about the Public Health Permit Center. You may experience delays in service during this transition time. Thank you for your patience!
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Public Health Permit Center
Submit or check the status of permits, applications, and complaints, and request inspections.
Hire a registered contractor
Find guidance on hiring a registered contractor for plumbing and gas piping installations.
Inspections for plumbing and gas piping installations
Learn how to submit a request for an inspection, find an inspector, and view your results.
Installations
Find resources and tips on installing water heaters, gas piping, waste and vent pipe installation, and more.
Applications and permits
Learn how to submit a plumbing or gas piping plan review application or get a homeowner's permit.
Important notifications
Plumbing, gas piping, and backflow device permits shall be obtained for each townhome
Effective March 22, 2021: A plumbing permit, gas piping permit, and backflow device permit shall be obtained for each townhome (single family home) that is constructed under 1 building (roof).
Guidance for legionella and building water system closures
To prevent Legionella growth, these systems must be actively managed and maintained. See information and guidance to reduce Legionella growth and other pathogen and corrosion concerns that occur when there is a large drop in building water use.
Based on the current volume of plumbing plan submittals, first review comments for most projects are at approximately 4 to 6 weeks. Please note, very large or complicated projects may take up to 14 weeks. The allowance to request "Expedited Plan Review" is no longer in effect, however some project types (schools, daycares, low-income housing, etc.) are given priority review status.