Professional Septic Tank Decommissioning in Snohomish County

Licensed, Bonded, and Insured Excavation Experts. We handle the permits, the pumping, and the paperwork so you don't have to.

40 Reviews

34 Reviews

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License # DEPTHDE828N7

Why Snohomish County Homeowners Trust Indepth Excavation With Septic Tank Decommissioning?

Your home sale is on the line. The Snohomish County paperwork is overwhelming.

One minor permit error could stall your closing for weeks. You are facing strict deadlines and complex WAC regulations.

The “red tape” feels like a wall between you and your goals.
Managing a pumper, an excavator, and an inspector is a total headache.

You fear heavy machinery will destroy your driveway or ruin your yard.

A poorly filled tank creates a dangerous sinkhole waiting to happen. You can’t risk your property’s safety on a “budget” fix.

You need a solution that lasts.

Indepth Excavation handles everything from start to finish. We pull the permits and coordinate the certified pump-out.

We manage the county inspector so you never have to play middleman.

Our precision equipment protects your landscape while our structural compaction secures your soil. We leave your yard level, clean, and ready for seed.

We turn your septic liability into a professional success.

1 Step at a... Wait You're Done?

Most people tend to overcomplicate the process when it comes to septic tank decommissioning, we got you completely covered, keeping it simple, and fast.

Step 1: Request a Free Quote For Your Decommissioning Your Septic Tank.

Step 2: Dillion Will Show Up On-Site to Give You a Precise Quote.

Step 3: We pull your “As-Builts”, certified pumper clears the tank, crush the lid, and fill the void.

Step 4: We pass the final county inspection and grade the soil. Your property is left clean, safe, and ready for its next chapter.

Connecting to City Sewer?

If you are moving from septic to city sewer, Indepth Excavation provides full-service trenching, pipe installation, and septic decommissioning. We bridge the gap between your home and the city main with precision and speed.

Other's That Have Received Our INDEPTH EXperience

All of the Areas We Service

Snohomish

Everett

Seattle

Gold Bar

Arlington

Big Lake

Bellevue

Burlington

Edmonds

Index

La Conner

Marysville

Monroe

Shoreline

Stanwood

Mount Vernon

Granite Falls

Woodinville

Here's Our FAQ!

Do I really need a permit to decommission my septic tank?

Yes. The Snohomish County Health District requires a permit and a final inspection to officially “retire” the system. This ensures your property’s “As-Built” records are updated, which is vital for selling your home or avoiding future liability. We handle the entire permit application for you.

How long does the process take?

The physical excavation and decommissioning usually take 1 to 2 days. However, the permit approval and final inspection timing depend on the County’s schedule. If you are in a real estate crunch, let us know and we specialize in fast-tracking these projects.

Do I need to have the tank pumped before you arrive?

The tank must be empty and certified as pumped per Washington State (WAC) code before it can be decommissioned. As part of our Turnkey Service, we coordinate with a certified pumper to ensure this happens right before we begin excavation.

Will my yard be a mess when you’re done?

We pride ourselves on “Precision Excavation.” We use right-sized machines to minimize the impact on your landscape. Once the tank is filled and compacted, we provide professional grading so your yard is level, clean, and ready for grass seed.

Can you handle the connection to the city sewer main?

Yes. We are full-service excavation experts. We can decommission your old septic tank and install the new sewer line, trenching from your home to the city connection in one seamless project.

How much does septic decommissioning cost?

Costs vary depending on the size of the tank, its depth, and property access. We provide free, transparent estimates with no hidden fees so you know exactly what to expect before we move a single shovelful of dirt.

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Meet the Owner,
Dillon Aschenbrenner

Dillon established In-Depth Excavation in 2018 following years of experience. What started as a side job for family and friends turned into an ambitious passion and career. Dillon served on the 24-hour on-call duty rotation team for five years. At his First-panel interview he was offered an entry-level position with Alderwood Water and Wastewater District (AWWD). Dillon advanced through the ranks, exceeded qualifications, and was the youngest to be promoted to Utility Worker Lead in company history.

In December 2017, Dillon was presented with the Arden Blackledge “Excellence in Leadership” award which is the highest annual honor given at AWWD.

He was employed by various contractors working on storm, water, sewer mains, demo, plus grading and restoring for two years. Dillon proudly serves Western Washington and is on course for growth to establish In-Depth Excavation as a competitor in diverse markets.

Still On the Fence About Choosing InDepth Excavation?

Give us a call at (425) 367-1521 or send us a form