A sewer scope inspection sends a small camera through the side sewer—the private pipe that carries wastewater from the house to the public sewer main—so you can see its condition before you buy. In Pierce County, that pipe is generally the property owner’s responsibility, and it is usually not covered by a standard home inspection. For older homes and homes with mature trees, a sewer scope is one of the most useful add-on inspections a buyer can order.
Who is responsible for the side sewer?
Local utilities are clear that the private line belongs to the owner:
- Pierce County’s Residential Sewer Customer Guide states that the building sewer, including the side sewer stub, is not part of the public sewer facilities and is maintained by the property owner.
- The City of Tacoma states that property owners are responsible for repairing and maintaining their private side sewer, and that repairs or replacement average $5,000 to $15,000 (Tacoma Permits).
Other cities, such as Puyallup, Sumner, and Bonney Lake, operate their own utilities with their own standards. The practical takeaway is the same: once you close, problems in the private line are generally yours to fix.
Why sewer scopes matter in Western Washington
Much of the South Sound’s housing stock was built decades ago. The City of Tacoma notes that properties built before 1980 likely have clay or concrete side sewer pipes that are vulnerable to cracking, shifting, and root intrusion. Pair older pipe materials with the region’s large trees and wet soils, and it is easy to see why buyers and lenders take the side sewer seriously.
Newer homes can have issues too—construction debris, poorly sloped sections, or damage from later landscaping work—but age is the biggest red flag.
What a sewer scope can reveal
- Root intrusion at joints or cracks.
- Cracks, breaks, or collapsed sections.
- Offsets, where pipe sections have shifted out of alignment.
- Bellies or sags, where the pipe dips and holds water or waste.
- Blockages or buildup that suggest a maintenance problem.
- Pipe material changes, which can show where past repairs were made.
A good report includes video, approximate locations and depths of concerns, and a plain-language summary. Ask your inspector whether the camera reached the connection to the public main, since some lines can only be partially scoped from an accessible cleanout.
When to order a sewer scope
Buyers typically schedule the scope during the inspection contingency period, alongside the general home inspection. Because that window is short, book the sewer scope as soon as you reach mutual acceptance. Ask the seller early whether there is an accessible cleanout, and whether they have past scope reports or repair invoices. The seller disclosure statement also includes a section on sewer and septic history; read more in What Is Form 17? Washington’s Seller Disclosure Statement Explained.
If the home uses a septic system instead of public sewer, you need a septic inspection instead. See How to Sell a Home With a Septic System in Pierce County for how those inspections work.
Buying or moving up in Pierce County?
The Barnard Group helps buyers build inspection plans, read findings, and negotiate smart outcomes. Call or text 253-677-5765, or explore homes at BarnardGroupRE.com.
If the scope finds a problem
Findings are not automatically deal breakers. Depending on severity and your contract terms, common paths include:
- Request a repair by a licensed contractor before closing, with documentation.
- Request a credit or price adjustment so you can handle the repair after closing. Lender rules can limit credits, so coordinate with your loan officer.
- Get a repair estimate first. A specific quote from a sewer contractor turns an alarming video into a concrete number to negotiate.
- Walk away within your contingency rights if the issue is more than you want to take on.
Minor root intrusion is sometimes handled with cleaning and ongoing maintenance, while a collapsed or badly bellied line may need replacement. Let the sewer professional—not guesswork—define the scope of work.
A note for sellers
If you are selling an older home, a pre-listing sewer scope can remove a common source of late-stage renegotiation. You will know what buyers will find, and you can repair, price accordingly, or disclose with documentation. Any known defect must be disclosed on Form 17. Our guide to selling as-is versus making repairs can help you decide which approach fits.
Frequently asked questions
Is a sewer scope part of a standard home inspection?
Usually not. Most home inspectors offer it as an add-on or refer it to a specialist. Confirm when you book.
Should I get a sewer scope on a newer home?
The risk is lower, but it can still be worthwhile, especially if there are large trees near the line or signs of slow drains. Discuss it with your inspector.
How long does a sewer scope take?
The inspection itself is usually quick. The bigger timing factor is scheduling it within your inspection contingency period.
Buy with a plan
A side sewer problem is much easier to handle before closing than after. If you are buying or moving up in Pierce County, call or text The Barnard Group at 253-677-5765 to talk through your inspection strategy. If you also need to sell your current home, book a complimentary Home Selling Strategy Session to plan both sides together.
