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King County, Washington

Licensed Septic Companies in King County, WA

15 septic companies serve King County, Washington.

Septic services in King County

Guides: Septic tank pumping · Septic system installation · Septic inspection · Septic repair · Drain field repair · Aerobic septic systems · Installation cost · Pumping cost

15 septic companies in King County

Seattle 5

Kent 3

Auburn 2

Maple Valley 2

Kirkland 1

Redmond 1

Woodinville 1

Septic licensing in Washington

Washington counties certify septic installers; the state licenses designers.

Permits for new systems, replacements and most repairs are issued locally. Ask the contractor which office handles King County and whether the permit fee is in their quote.

Washington septic licensing: agencies, license types and how to check a license →

Septic companies in King County: common questions

How many licensed septic companies are in King County, WA?

15 septic companies serve King County, Washington. Each license badge on this page names the agency and links to its lookup so you can confirm it.

Who licenses septic contractors in Washington?

Washington counties certify septic installers; the state licenses designers. The licensing body is the County health departments (designers licensed by the state).

Which companies pump septic tanks in King County?

12 of the 15 listings in King County offer septic tank pumping, either on their own website or under a state pumper license. Use the service filter above to show only those companies.

Which companies install septic systems in King County?

9 listings in King County install septic systems. New systems and replacements need a permit, so ask each installer to handle the permit and to show their Washington license.

How do I check a septic contractor's license in Washington?

Washington has no public statewide list. Washington counties certify septic installers; the state licenses designers.