If you're in the process of buying a home in the Greater Seattle area, your real estate agent has probably walked you through the standard inspection checklist: general home inspection, maybe a separate roof inspection, possibly a pest inspection.

But there's one inspection that often gets skipped — and in this market, it might be the most important one: a sewer scope.

Here's why it matters, and why more Seattle-area buyers and agents are making it standard practice.

What a Standard Home Inspection Doesn't Cover

A general home inspection is thorough when it comes to what's visible — the roof, foundation, electrical panels, plumbing fixtures, HVAC systems, windows, and structure. Your inspector will run faucets and flush toilets to check for obvious drainage problems.

What they can't see is the underground sewer line connecting your home to the city system. That pipe is buried several feet underground, typically running from your house to the street. A standard inspection has no way to evaluate its condition.

The only way to know what's happening inside that pipe is with a sewer camera inspection — a small camera fed through the pipe that provides a live video of its interior condition.

Why This Matters So Much in Seattle

The sewer scope isn't equally important everywhere. But in the Greater Seattle area, several factors make it especially relevant:

The housing stock is older than it looks. Many homes across Seattle, Bellevue, Kirkland, Redmond, and Edmonds were originally built in the 1950s through 1970s. Even beautifully remodeled homes may still have the original sewer infrastructure underground. A kitchen renovation doesn't upgrade the sewer line.

Older pipe materials are reaching end-of-life. Homes of that era were typically built with clay or cast iron sewer pipes. These materials degrade over decades — developing cracks, joint separations, corrosion, and structural weakness. Some homes in the area still have Orangeburg pipe (a paper-based material that was only designed to last 30-50 years).

Trees are everywhere. Seattle's mature urban canopy is beautiful, but tree roots are the number one cause of sewer damage in the region. A property with large trees near the sewer line is at elevated risk.

Sewer repairs are expensive. Depending on the damage, a sewer repair or replacement in the Seattle area can cost anywhere from a few thousand dollars for a minor fix to $15,000-$25,000+ for a full replacement. That's a significant surprise expense in the first year of homeownership.

What a Sewer Scope Can Find

A typical sewer scope inspection takes 30-60 minutes. Here's what the camera can reveal:

• Root intrusion — roots growing into the pipe through cracks or joints
• Cracks and breaks — from age, ground shifting, or external pressure
• Collapsed sections — where the pipe has partially or fully failed
• Bellied pipe — sagging sections where water pools and sediment collects
• Offset joints — where pipe sections have shifted out of alignment
• Pipe material and age — so you know what you're working with long-term
• Previous repair quality — whether past fixes were done well or poorly

How to Use the Results

A sewer scope doesn't have to be a deal-breaker — in fact, most of the time it isn't. But it gives you information you can act on:

If the sewer line is in good shape: Great. You have peace of mind and documentation for your records.

If there are minor issues: You can negotiate with the seller to address the repair before closing, or reduce the purchase price to account for the cost.

If there are major issues: Now you know. You can get repair estimates, factor them into your budget, negotiate aggressively, or decide the property isn't worth the risk.

In every scenario, you're making a more informed decision. And in a market where homes often sell for $500,000 to $1,000,000+, a $200-$400 sewer scope is a tiny insurance policy against a major surprise.

A Note for Real Estate Agents

More and more buyer's agents in the Seattle area are recommending sewer scopes as standard practice — and their clients appreciate it. It's a small addition to the inspection process that demonstrates thoroughness and protects your buyer from an expensive post-closing surprise.

It also protects the transaction. A sewer problem discovered after closing can lead to unhappy clients, strained relationships, and in some cases, legal disputes. A pre-purchase scope prevents all of that.

How to Schedule a Sewer Scope

A few practical tips:

• Schedule it during your inspection contingency period — ideally the same day as your general inspection, or within the same window.
• Use a sewer specialist, not a general plumber. Specialists do this work every day, have better camera equipment, and provide more detailed assessments.
• Be present if possible. Watching the camera feed in real-time gives you a much better understanding of the pipe's condition than reading a report after the fact.
• Get it in writing. A written report with photos or video clips is useful for negotiations and for your records.

Seattle Select Sewers: Honest Inspections Since 2005

We provide pre-purchase sewer scope inspections across the Greater Seattle area — Seattle, Bellevue, Kirkland, Redmond, Everett, Edmonds, Issaquah, Burien, and Bothell. We work with home buyers and real estate agents regularly, and we pride ourselves on clear, honest reporting.

We have no incentive to exaggerate. Our reputation — 22+ five-star Google reviews and 20+ years of service — is built on telling you exactly what we see.

Call 425-531-4847 or visit seattleselectsewers.com to schedule a sewer scope. Same-week appointments are often available.