Licensed Septic Contractors Based in Seattle, WA

9 licensed septic contractors based in Seattle. Every license number below is sourced from public licensing records, with a link to look it up yourself.

"Based in" is the city on the business's license record. That can be a mailing address; it doesn't tell you where the business works. Businesses based in nearby towns may also work here.

Browse Seattle by service

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Looking for a specific contractor? Search by name, business name, or license number.

Services in Seattle, with national cost ranges

Listings based in Seattle whose license class covers each service. Cost ranges are national; each links its cost guide.

None of the listings based in Seattle hold a license class we can match to perc test and soil evaluation. Ask any contractor whether they do this work, or browse the listings based in King County.

Listings that hold a matching license class, based in nearby towns rather than in Seattle, for the services with fewer than 3 here. Nearest first, in straight-line miles from the center of Seattle:

Septic System Installation

• Alberta Septic Systems, based in Newcastle, about 12 miles away
• Mike's Materials LLC, based in Vashon, about 14 miles away
• Lewis Roggenbuck Const LLC, based in Vashon, about 14 miles away
• Potential Energy Inc, based in Vashon, about 14 miles away
• Vashon Septic, based in Vashon, about 14 miles away

Septic System Design

• Charles Henry Pollmar, based in Bainbridge Island, about 10 miles away
• David Mark Lowe, based in Kenmore, about 11 miles away
• Dave A Ghylin, based in Bremerton, about 15 miles away
• Rodney V Left, based in Bremerton, about 15 miles away
• Franklin J Clark, based in Bremerton, about 15 miles away

Hiring a septic contractor in Seattle

Before you hire, confirm the license is still active with the agency that issued it and get at least three written quotes.

Homeowner guides

• What Is a Septic Tank and How Does It Work?

Nearby cities