Yes, sewer issues are your concern. In Washington, the private sewer line that runs from the house to the public main belongs to the property owner, and once you close, so does every crack, root, and sag inside it. A sewer camera inspection before closing shows you what you are buying while you can still negotiate.
We are a locally owned, veteran owned septic and sewer company in Puyallup, and we inspect and repair these lines for buyers and homeowners across Pierce, King, and Thurston counties. Here is what we want every buyer to know before the inspection window closes.
Who Is Responsible for the Sewer Line After You Buy a House?
You are, from the house to the public main in most cases. Pierce County’s Residential Sewer Customer Guide states that the building sewer, including the side sewer stub that runs from the main to the property line, “is not part of the public sewer facilities” and “shall be maintained by the property owner.”
King County says the same thing in plainer words: side sewers need maintenance, the property owner is responsible for it, and when buying a house you should always get a side sewer inspection.
In practical terms, the pipe under your lawn, driveway, and landscaping becomes your repair bill on the day you take the keys. The utility handles the main in the street. Where your responsibility ends can differ between city and county sewer providers, so confirm the boundary with the utility that serves the address.
One more local detail worth knowing: when an owner applies to repair or reroute an existing sewer in unincorporated Pierce County, the county asks for video of the existing pipe conditions. A camera inspection is often the first step of a repair anyway, so doing it before you buy costs you nothing you would not eventually need.
Does a Standard Home Inspection Check the Sewer Line?
Usually not inside the buried pipe. A general home inspection typically covers the plumbing you can see: fixtures, visible drain lines, and how water flows out of sinks and tubs. The side sewer sits underground, and the only practical way to see inside it is a camera run through a cleanout or other access point.
Ask your home inspector, in writing, whether a sewer camera inspection is part of the scope. If it is not, schedule one separately and early, so the results arrive before your inspection contingency deadline.
Do not rely on how the drains behave during a showing. A vacant or lightly used house sends very little water down the line, which can hide a partial blockage or a sag that only causes trouble once a family is running laundry, showers, and the dishwasher every day.
What Does a Sewer Camera Inspection Show Before Closing?
It shows the inside condition of the line, from the house toward the main, as far as access and pipe conditions allow. Our home sale septic and sewer inspections follow a simple sequence:
- Find the access point. We locate the cleanout or another entry into the line. [VERIFY: client’s approach when a home has no cleanout]
- Run the camera. We feed a camera through the pipe and record what it sees along the way.
- Mark the problem spots. We note where any defect sits along the line so a repair estimate can be specific. [VERIFY: client uses a locator to mark distance and depth]
- Explain the findings. We walk you through what we saw in plain language, including what needs attention now and what to watch. [VERIFY: whether the client provides the video recording and a written report to buyers]
A camera inspection can reveal root intrusion at joints, cracks, offset or separated joints, sags that hold water, buildup, corrosion in older pipe, and collapsed sections. It also has limits. Standing water, debris, and heavy damage can block the view, so we weigh what the camera shows alongside the symptoms and the history of the property.
Does Homeowners Insurance Cover Sewer Line Problems?
Often not for the most common ones. Roots, gradual deterioration, and age-related wear are typically treated as maintenance issues rather than sudden, covered events. Washington’s Office of the Insurance Commissioner also notes that sewer backup coverage “is not covered by a standard home policy and can be added as an optional endorsement.”
Before closing, ask your insurance agent two direct questions:
- Does the policy include sewer backup coverage, and what is the limit?
- Is service line coverage available for the buried pipe itself, and what does it exclude?
We are not insurance professionals, and the wording of your policy decides what is covered. What we can tell you from the field is that buyers who count on insurance to replace a root-damaged or deteriorated line are often disappointed. An inspection before you buy protects your budget in a way most policies do not.
What Changes If the Home Is on a Septic System?
The seller has more to disclose, and in Pierce County, more to do before the sale. Washington’s seller disclosure statement under RCW 64.06.020, often called Form 17, asks whether the property is on public sewer or an onsite sewage system (a septic system), when the system was last pumped and inspected, whether there are known defects, how many bedrooms it was approved for, and whether the drain field sits entirely on the property. It also asks whether the house is connected to the sewer main when public sewer is available, which matters if you may face a septic to sewer conversion later.
Read every answer, including the “don’t know” boxes. The form also gives you three business days after delivery to rescind the agreement, unless you and the seller agree otherwise in writing.
In Pierce County, the Tacoma-Pierce County Health Department requires sellers to have the system pumped and inspected, then issues a Report of System Status. The report is valid for one year. If deficiencies are still unresolved at the sale, the buyer can assume responsibility for fixing them within 90 days of closing. That is a deadline you inherit, so read the report closely before you agree to it.
King and Thurston counties set their own rules, and statewide requirements for septic inspections at property sale are changing in 2027. Our guide to septic system inspection requirements in Washington State covers the differences.
What Can You Do If the Inspection Finds a Sewer Problem?
Use it to negotiate while your contingency is still open. A defect found before closing is a bargaining point. The same defect found after closing is your project. Here is how common findings usually translate into next steps:
| Finding | What it usually means | Common buyer response |
|---|---|---|
| Light roots at one joint | Early intrusion in an otherwise sound line | Ask the seller to have the line cleared and rechecked, or request a modest credit |
| Cracked or separated section | Localized damage that may allow a section repair | Request a seller repair or a credit based on a written estimate |
| Sag holding water | A grade problem that can cause recurring clogs | Get a repair estimate and negotiate before deciding |
| Widespread deterioration or collapse | Replacement is likely | Renegotiate the price, ask for replacement before closing, or walk away within your contingency |
Repair cost depends on the length and depth of the line, pipe material, how much needs work, what sits on top of it (a driveway costs more to open than a lawn), access, permits, and restoration. [VERIFY: client’s typical price ranges for a home sale sewer inspection and common repairs, if they want to publish them]
A vague note that the line “might need work” gives you little leverage. A written estimate from a sewer contractor gives you a number to put in front of the seller. If the findings point to sewer line repair or replacement, we can scope the work so you and your agent know exactly what you are negotiating over. Your real estate agent or attorney can advise on how to write the request into your contract.
Sewer Questions Buyers Ask Us
Who usually pays for a sewer inspection when buying a home?
The buyer usually orders and pays for it as part of their own due diligence, the same way they pay for a general home inspection. That keeps the inspector working for you. If the inspection finds a defect, the cost of the repair is what gets negotiated, and that is often where the seller contributes.
Can I skip the sewer inspection on a newer home?
We would not. Newer lines can still have construction debris, poorly supported sections, or damage from later landscaping and fence posts. Age lowers the odds of a problem, but it does not remove them, and the cost of the inspection is small next to the cost of digging up a yard.
Can I rely on the seller’s sewer inspection report?
Read it, but ask for the video, not only the summary. Check the date and who performed it. If the report is old, has no video, or leaves sections of the line unviewed, an independent inspection is worth scheduling before your deadline.
What should I do about the sewer line after moving in?
Find the cleanout so you can give a technician access quickly. Keep wipes, grease, and other non-flushables out of the drains, and learn the early signs of trouble: gurgling, slow drains on the lowest floor, and odors. If wastewater ever comes back up a drain, our guide to handling a sewage backup in your home explains what to do first.
Know What You Are Buying Before the Contingency Ends
A sewer camera inspection takes the guesswork out of one of the most expensive parts of a home you cannot see. Call (888) 469-8606 or schedule your home sale sewer inspection, and we will help you make your decision with real information in hand.
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