Quick answer
In Lynnwood, the property owner cleans and maintains the side sewer, cleans the service lateral and must keep an accessible cleanout at the edge of the right of way. The city maintains laterals and mains. If a lateral blockage comes from pipe failure, the city pays for clearing; if it comes from roots or buildup in a sound pipe, the owner pays. Public Works after hours: 425-329-6205.
Updated · By the Seattle Plumber Pros editorial team · How we research
What are Lynnwood homes like, plumbing-wise?
Lynnwood's houses are older than many people expect. Census Bureau survey data for 2020 to 2024 put the median year built at 1979, with about 22 percent of homes built in the 1960s and about 18 percent in the 1970s (ACS table B25034 via Census Reporter). Original galvanized supply lines, older water heaters and concrete or clay side sewers are all plausible in homes of that age, so ask what materials a plumber expects to find before you accept a quote.
Who is responsible for the sewer pipe in Lynnwood?
Lynnwood splits responsibility in an unusual way. Its Sewer Line Cleaning page defines the side sewer as the privately owned portion of the sewer serving a building, running from the building to the edge of the right of way or easement, and the service lateral as the part inside the right of way or the easement holding the city main. The property owner is responsible for cleaning and maintaining the side sewer and for cleaning the service lateral. The owner must also install, maintain and keep accessible a sewer cleanout at ground level at the edge of the right of way or easement. The city maintains the service laterals and the mains.
What that means when the line backs up:
- If you cannot clear a lateral blockage and you have an accessible cleanout, first hire a professional and give the city proof of the attempt. The city will then respond.
- If the blockage was caused by pipe failure, the city pays for clearing and maintenance. If it was buildup or roots in a sound pipe, the owner pays for the cleaning.
- If there is no accessible cleanout, you must install one or bring the existing one up to grade before the city will work in the lateral.
Keep the drain company's written report and any camera video. They are your evidence of where the problem is. Our drain cleaning guide covers typical prices.
Who do you call for a water or sewer problem in the street?
The city's report-a-problem page lists Public Works at 425-670-5200 during maintenance hours, 7:00 a.m. to 3:30 p.m., and an after-hours emergency number, 425-329-6205. You can also report through the city's online portal. For a leak inside your home, close your main shut-off valve first; our emergency guide explains the steps.
When do you need a plumbing permit in Lynnwood?
Lynnwood is in Snohomish County, so permits come from the city's Development and Business Services, not from King County. The city's guide to getting a permit says a remodel may need a plumbing permit if any sinks or pipes will be relocated, and applications go through the online permit center. The city's list of work exempt from permits says stopping leaks in drain, water, soil, waste or vent pipe does not need a permit, and neither does clearing stoppages or repairing leaks in pipes, valves or fixtures, as long as the repair does not replace or rearrange valves, pipes or fixtures. If a concealed pipe is defective and has to be replaced with new material, that is new work and needs a permit and inspection.
How do you check a plumber working in Lynnwood?
Washington certifies plumbers and licenses plumbing contractors through the Department of Labor and Industries. RCW 18.106.020 says no one may do or offer to do plumbing for others without a state certificate in their possession, and that a trainee must be supervised by a certified plumber. Search the company or license number in the L&I Verify tool and confirm the contractor license is active and that there are no open infractions. Ask the person who arrives to show their certificate. Our hiring guide lists other checks, and our cost guide helps you judge a quote.
How can this site help?
This site is an independent homeowner guide operated by SWKM GmbH. We are not a contractor, hold no license and do not perform plumbing work. If you would like help, email us your Lynnwood ZIP code, what is happening and a few photos. We reply by email with practical next steps and, where we know a licensed contractor for your area, an introduction. Please run the license checks above on anyone you hire, including anyone we mention.
Frequently asked questions
Does Lynnwood pay for sewer lateral repairs?
Partly. According to the city's Sewer Line Cleaning page, the city maintains service laterals and pays for clearing when a blockage is caused by pipe failure. If the cause is buildup or root intrusion and the pipe is structurally sound, the owner is charged for the cleaning. You must first try a professional and give the city proof.
Do I need a sewer cleanout in Lynnwood?
Yes. Lynnwood says property owners must install, maintain and keep accessible a sewer cleanout at ground level at the edge of the public right of way or easement. The city will only work in the lateral if there is an accessible cleanout at the property line, so a missing one can delay a repair.
Is a permit needed to fix a leaking pipe in Lynnwood?
Not for a simple repair. Lynnwood's exempt work list says stopping leaks and clearing stoppages do not need a permit if no valves, pipes or fixtures are replaced or rearranged. If a concealed pipe is defective and must be replaced with new material, it counts as new work and needs a permit and inspection.
Sources
- City of Lynnwood: Sewer Line Cleaning (roles and responsibilities)
- City of Lynnwood: Flooding, a Water Leak, or a Sewer Issue
- City of Lynnwood: Guide to Getting a Permit
- City of Lynnwood: Work Exempted from Building Permit (PDF)
- RCW 18.106.020, Certificate or permit required
- U.S. Census Bureau ACS 2020-2024, Year Structure Built, Lynnwood (via Census Reporter)
Independent homeowner guide operated by SWKM GmbH. Not a licensed contractor. We do not perform plumbing work. More about this site.