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Public Health - Seattle & King County will start accepting plumbing and gas piping plan review applications via the Environmental Health’s online services portal; and will require applicants who opt to apply via mail to use the updated plumbing and gas piping permit application forms starting October 29th, 2020.

See instructions on how to submit online a medical gas plan review and permit application (PDF).

On May 31, 2020 Governor Inslee signed Proclamation 20-25.4 and outlined his "Safe Start" plan for a county-by-county phased reopening. Construction – issued May 15 (updated July 2)

For more detailed information, read the Phase 2 Construction COVID-19 Job Site Requirements.

A callback number for the responsible person of the job site is required for all inspection requests. An inspector will call on the morning of the inspection request (6:30am to 8:00 am). This conversation will allow the inspector to verify the Job Site Requirements prior to the site visit. Thank you in advance for your cooperation.

Call or email us with questions at 206-263-9566

  • Drinking water program
    Regulation small public and individual private water systems to prevent communicable diseases and illnesses.

  • Wastewater program
    Services and regulations to ensure that over 85,000 septic systems including 192 septic systems in Seattle are safe. Septic systems treat wastewater when homes and buildings are not connected to public sewer systems. Also provides educational, advisory and permitting services for owners of septic systems and certifications for several septic professionals.

  • Water recreation program
    Plan review, permits and inspections for public and semi-public pools and spas in King County.

Environmental Health Services
401 5th Ave, Suite 1100
Seattle, WA 98104

Phone: 206-263-9566
Inspection request line:

For Vashon Island residents: Plumbing and gas piping inspections located on Vashon Island are only performed on Wednesdays.

Temporary schedule changes:

  • Due to the Governor's "Stay Home—Stay Healthy" order, the Plumbing and Gas Piping program will limit the business hours for plan review document submittals to every Wednesday morning between the hours of 9 AM to 1 PM. For customers who wish to drop plans during the established day and time; it is required to contact Harpreet Sandhu (Sandy) at: 206-477-8638,, to obtain delivery instructions.

  • Front office closures:
    To reduce person-to-person contact related to COVID-19, the Environmental Health Services Division's in-person counter services at 401 Fifth Avenue in Seattle, WA (Chinook Building) and 14350 SE Eastgate Way in Bellevue, WA (Eastgate Public Health Center) will be suspended through the end of March. See full notice on the Environmental Health homepage.

Permit hours

  • Mon. Wed. Fri: 8:00 am to 3:00 pm
  • Tues. and Thurs: 10:30 am to 3:00 pm
  • Phones are answered until 3:00 pm

Environmental Health Services
14350 SE Eastgate Way
Bellevue, WA 98007

Phone: 206-477-8050
Inspection request line:

Permit hours:

  • Mon. Wed. Fri: 8:00 am to 3:00 pm
  • Tues. and Thurs: 10:30 am to 3:00 pm
  • Phones are answered until 3:00 pm

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COVID-19 Guidance for Legionella and Building Water System Closures

Many buildings are closed to the public or have limited access in order to help slow the spread of COVID-19. 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.

Plan Review required for plumbing and gas piping installations

The Washington state adopted plumbing code (2015 Uniform Plumbing Code) section 113 requires a permit to be obtained from the Authority Having Jurisdiction prior to each installation, alteration, repair, replacement or remodel. Section 114 sets requirements for a permit application.

Subsection 4 states that a permit application to be "accompanied by plans, diagrams, computations and specifications, equipment schedules and other data as required by the Authority Having Jurisdiction."

Be informed: Not all plumbing and gas piping installations are subject to a plan review. Please open and read the "Plan Review Submittal" information (open Plan Review Information on the left side of this page) to determine if your project requires a plan review.

Please check our website periodically for upcoming updates and changes.