Superior Septic System Installation for Over 50 Years in King & Snohomish Counties

Formerly Snohomish Septic, Woodinville Septic, Kingsgate Septic and Evergreen Onsite, we’ve combined to streamline our operations, and we’re excited to reintroduce ourselves as The Septic Group! Continuing to serve Snohomish and King counties, The Septic Group retains the same personnel with the same expertise, superior septic service and competitive pricing. The only difference you’ll notice is our new name and logo. As always, we provide great responsiveness and an enhanced range of services. We look forward to serving you!

With over 50 years’ experience in septic system installation and design, our superior septic pros have seen every residential and business septic challenge and problem. And since we’ve seen it all, we know what will work best in virtually any situation. Whether we’re installing a small residential septic system or a large corporate waste management system, and whether it’s a new installation or replacement of an old, malfunctioning system, you can depend on The Septic Group.

Septic System Installation Pros

Many installation projects come with unique challenges, and that’s what makes our job interesting and creative. Improper or thoughtless installation can result in repair headaches later, so we employ several licensed master installers to oversee your project and answer any questions you may have. You can count on us to install every septic system to the highest industry standards without ever cutting corners.

The Installation Process at a Glance

Superior septic installation is no small undertaking; there’s far more to it than just digging up an area and burying new lines and components. We keep you informed if anything unforeseen comes up during installation (very rare), and always present options that are in your best interest. We’ve built good relationships with designers and health departments over the years, which helps your project move along quickly and smoothly.

Superior Septic System Pros

For any septic-related need, contact The Septic Group. From installation to inspection to pumping to maintenance. We offer more than just great service; we offer peace of mind. Call for superior septic now!

Licensed & Insured Septic System Installation Professionals in King & Snohomish Counties – Get Superior Septic Now!

Serving Snohomish, Arlington, Bellevue, Bothell, Carnation, Duvall, Edmonds, Everett, Fall City, Granite Falls, Issaquah, Kenmore, Kirkland, Lake Forest Park, Lake Stevens, Lynnwood, Marysville, Mill Creek, Monroe, Mountlake Terrace, Mukilteo, Newcastle, Redmond, Sammamish, Seattle, Stanwood & Woodinville

The Septic Group (Formerly Woodinville Septic Service)

110 Google reviews

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Steve Drumheller

2022-05-16

If you need to get your septic tank replaced, you definitely need to call The Septic Group. These types of installations are quite overwhelming and complicated, so it nice to have some knowledgeable who can walk you through the process. Rhea and her team explained everything to me right from the start, so I knew from the beginning I was in good hands. Everything administratively done on time. The staff was completely on top of all the steps during the entire project. Also, the installers were terrific. Tim and Dylan came out to my house before the project started and we did a walk-around and they explained what I was to expect. We have a landscaped yard that we have worked on for over 25 years, and installers took as much care as they possibly could to preserve and protect our plants and patio, which we really appreciated. Tim and Dylan showed up on time every day and completed the project when they said they would. Tim is a great backhoe operator, and he really did a great job of working around some very tight spaces in my backyard. Lastly, their bid was extremely competitive and was even less than a local contractor that was recommended to me by a neighbor. The Septic Group had to travel over 50 miles each way from Lake Stevens to Normandy Park to install my septic system. I really can't imagine that I would have gotten that good of service from anyone else. Thanks Septic Group!

Suzy Winkle

2022-04-06

On time, right to work, finished in great time. Love this company!

vicki stribling

2022-03-30

Len REID

2022-03-23

Evergreen On-site, division of the Septic Group, performed our annual inspection of our system. Technician did a thorough job and gave us an honest opinion on the current status of it. however, we had to get them back 2 times to correct an alarm issue that was found to be caused by a pump filter they forgot to clean during the initial inspection/service. We were happy with their service and the promptness in doing it.

Bruce Bjorklund

2022-03-16

Had an issue with 100 year old septic, and they went above and beyond to take care of me. Absolutely loved the support and brainstorming I got from the back-office and field team.

Dawn Cook

2022-03-12

the team pumped may septic tank installed collars and new covers, it is a relief to know this very big job was done and done correctly, They also diagnosed and repaired a baffle. Good guys to work with. Would recommended them anytime.

Ted Cherrier

2022-03-02

The Septic Group did a great job for us in repairing and servicing our septic system. Scheduling and billing was easy. The on-site team were pleasant and professional. The crew was on-time for each of the two appointments and were very clear on what was done to the system.

BOB Y

2022-02-24

Gregg Field

The pump went out while they were pumping out the septic tank. They came back promptly the next day and replaced it.