Plumbing and gas piping offices

SEATTLE

Department of Planning and Development (DPD)
Seattle Municipal Tower, 20th floor
700 Fifth Ave [ MAP ]
Seattle, WA 98104

Phone: 206- 296-1175
Fax: 206-296-0189

Inspection request line: 206-205-0935
Permit hours (The permit counter is located on the 20th floor):
- Monday, Wednesday and Friday: 8:00 AM to 5:00 PM
- Tuesday and Thursday: 10:30 AM to 5:00 PM
- NOTE: The counter is closed daily from 12:00 pm to 1:00 pm for lunch

BLACK RIVER (RENTON)

900 Oakesdale Ave. SW, Suite 100 [ MAP ]
Renton, WA 98057

Phone: 206-296-4932
Fax: 206-296-4919

Inspection request line is 206-205-0935
Permit hours are 7:00 am to 5:00 pm, on Monday, Tuesday and Wednesday and 9:00 am to 5:00 pm on Thursday.

See full Plumbing and Gas Piping staff directory and King County inspection areas

Applications, permits and inspections

	How do I get a Homeowner's Plumbing Permit?
	Downloadable permit applications
	Plumbing and gas piping service fees

Plumbing codes and related information

	How do I get a Homeowner's Plumbing Permit?
	Where to get a copy of the Code
	Guidelines and policies for contractors, installers and interested persons
	Installing waste and vent pipes and fittings
	Drainage and venting fixture unit values
	Installing your new water heater
	Waste discharge (diagrams)
	Installing your new waterline
	Water supply fixture units (WSFU) and minimum fixture Branch pipe sizes
	Styles of pipe fittings

Gas piping codes and related information

	Where to get a copy of the Code
	Guidelines and policies for contractors, installers and interested persons
	Installing your new water heater
	Installing gas piping

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