Short answer: replacing the sewer line on your property usually needs a plumbing permit from the building department, and work in the street or sidewalk area usually needs a separate right-of-way or sewer permit. If the repair spans both, you may need both. Trenchless methods like pipe bursting and lining usually still need permits.
Slow drains, a sewage smell in the yard, or a camera inspection showing roots and a collapsed pipe: sooner or later many older homes need their sewer line repaired or replaced.
It is expensive, it involves digging, and it almost always needs a permit. What surprises most homeowners is that it can need two permits from two different agencies.
This guide explains sewer line replacement permits: who owns which part of the pipe, which permits apply on your lot versus under the street, who is allowed to do the work, and how inspections work. Rules are local, so confirm with your AHJ (authority having jurisdiction). See our disclaimer.
Quick answer
- On your property (house to property line): usually a plumbing permit from the building department.
- In the street or sidewalk area (public right-of-way): usually a separate right-of-way, sewer, or excavation permit from public works or the sewer utility.
- Both areas: you may need both permits.
- Trenchless methods (pipe bursting, lining) usually still need permits.
Who owns the sewer lateral?
The pipe from your house to the public sewer main is often called the sewer lateral. In most cities, the homeowner is responsible for at least the part on private property, and many cities make the owner responsible all the way to the main, including the section under the sidewalk and street. That is why homeowners can end up needing a public-works permit even though the pipe is "theirs."
Still on septic? See septic repair permits or, if you are hooking up to the public sewer for the first time, septic-to-sewer conversion permits.
How real cities split the permits
Portland is a clear example. Its guide to broken sewer lines says a "plumbing permit (PT) is required for sewer work between the house and the property line," a "right-of-way/sewer repair permit (UR/UC) is required for sewer work in the right-of-way," and when repairs span both areas you need "both PT and UR/UC permits" (Portland.gov). Portland also says "only the property owner or a licensed plumbing contractor can legally work on the sewer line."
Other cities follow similar patterns. Oakland issues a sewer lateral permit for work in the right-of-way, and Los Angeles handles connections and repairs in the public way through its Bureau of Engineering S-permit.
Seattle: one permit for the whole side sewer
Seattle treats the whole pipe as one job. The city calls it the side sewer, and Seattle Public Utilities says the property owner owns and maintains all of it, from outside the building footprint (foundation drains excepted) up to, but not including, the tee or wye where it joins the public main under the street (Seattle side sewer permits). One side sewer permit covers work on private property and in the right-of-way. If any of the work happens in the right-of-way, including excavation or just staging equipment there, you also need a separate permit from the Seattle Department of Transportation.
Seattle also draws a line many homeowners will appreciate. Permits are always required for side sewer repairs, but not for root removal or unclogging (Seattle side sewer repair methods). Your contractor schedules a city inspection before the pipe is covered.
How four cities split sewer permits
| City | Private side | Public right-of-way |
|---|---|---|
| Portland, OR | Plumbing permit (PT), house to property line | Right-of-way/sewer repair permit (UR/UC); both if work spans both |
| Oakland, CA | Sewer Lateral (SL) permit covers private property | Same SL permit covers the City right-of-way; inspector checks pipe, connections, compaction results |
| Los Angeles, CA | Not stated here | Bureau of Engineering S-permit for connections and repairs in the public way |
| Seattle, WA | Side sewer permit; owner responsible to the connection at the main | Covered by the same side sewer permit |
Sources: Portland.gov, City of Oakland, LA Bureau of Engineering, Seattle Public Utilities.
Who can do the work
- Private side: some jurisdictions let owner-occupants do their own sewer work under a homeowner plumbing permit; many require a licensed plumber.
- Street side: work in the public right-of-way usually requires a licensed, bonded, and insured contractor, plus traffic control plans if lanes or sidewalks are closed.
- Call 811 before digging so underground utilities are marked. It is free and legally required in most states.
See plumbing and gas line permits for more on homeowner plumbing permits.
Inspections
Sewer inspections happen with the trench open and the pipe exposed. Inspectors check:
- Pipe material and joints approved by code
- Slope toward the main (so waste flows and does not settle)
- Bedding and support under the pipe
- Cleanouts at the required locations
- A backwater valve where required by local code
- A test of the new line, often with water or air
Portland notes that inspections must occur while the pipe is still exposed. Do not backfill before the inspector signs off. Street-side work usually has its own inspection for trench restoration, sidewalk, and pavement patching.
Point-of-sale sewer inspections
Some cities and regional sewer districts, especially in California, require a sewer lateral inspection or certificate when a home is sold or remodeled above a certain value. If you are buying or selling, ask whether a lateral certificate is required and budget for a camera inspection. See how to check permit history before buying.
A real example: the East Bay's sewer lateral certificate
The East Bay Municipal Utility District (EBMUD) runs one of the best-known programs. Under the regional private sewer lateral ordinance, a property needs a Compliance Certificate when it's bought or sold, when building or remodeling work worth more than $100,000 reaches final permit sign-off, or when the water meter size changes (EBMUD private sewer laterals). The process works like this:
- A contractor checks the lateral and repairs or replaces it if needed, getting any city permits.
- An EBMUD inspector watches a test confirming the lateral doesn't leak. Your contractor usually schedules it.
- EBMUD issues the certificate once the lateral passes.
If a sale can't wait, EBMUD offers a Time Extension Certificate that gives 180 days to finish the work, with a $4,500 refundable deposit. Buyers and sellers negotiate who handles it. In HOA communities, the HOA's statement of responsibility decides who maintains which pipes, so ask for a copy during escrow.
Costs to plan for
- Plumbing permit fee (often modest)
- Right-of-way or excavation permit, sometimes with a deposit or bond
- Traffic control and pavement restoration if the street is opened
- Cleanout and backwater valve additions required by code
For general permit fee math, see how much a building permit costs.
Shared sewer lines: when your neighbor is part of the job
Some houses don't have their own line all the way to the main. Two or more laterals join first and run out together. Seattle says that from the point where your pipe combines with a neighbor's, you share responsibility for maintenance and repairs. The city encourages neighbors to agree on the scope of work and the contractor before anything starts, and to get at least three bids (Seattle side sewers). Portland's guide calls this a common private sewer, or party sewer: the privately owned part of a building sewer that serves more than one building with different owners (Portland broken sewer lines). If a camera inspection shows a shared section, talk to your neighbor before you sign a contract.
Trenchless methods in plain terms
Seattle Public Utilities describes the two common trenchless repairs this way (Seattle repair methods):
- Pipe bursting: a new flexible pipe is pulled through the old one. It needs an access pit at each end, but there's less surface damage than with a full trench.
- Cured-in-place pipe (CIPP) lining: a resin-soaked felt liner is inserted, inflated to the shape of the old pipe, and cured until it hardens into a seamless pipe inside the old one.
Neither one avoids the permit. Seattle requires a permit for side sewer repair work, whatever the method.
Questions to ask the sewer contractor
- When will you run the camera? Seattle notes that a camera can't see under standing water, so it's most useful after the blockage is cleared.
- Can I get a copy of the video? Seattle suggests keeping it. It helps if you ever file a claim with the city or want to track the pipe's condition over time.
- Which permits will you pull, and in whose name? Ask for the permit numbers before the excavator shows up.
- Who restores the sidewalk or street, and when? Street-side work usually has its own inspection.
If cost is the obstacle, check for local help. Seattle, for example, says interest-free loans are available for low- or fixed-income customers repairing a side sewer (Seattle side sewers).
FAQ
Do I need a permit to replace a sewer line?
Almost always. Expect a plumbing permit on private property and a separate public-works permit for any work in the street or sidewalk area.
Does trenchless sewer replacement need a permit?
Usually yes. Pipe bursting and lining still replace or alter the sewer line and need inspection, even with less digging.
Can I replace my own sewer line?
Some cities allow owner-occupants to do private-side work. Street-side work almost always requires a licensed, bonded contractor.
Do I need a permit just to have roots cleared out of the line?
Usually not. Seattle, for example, doesn't require a permit for root removal or unclogging, only for repairs and replacement (Seattle repair methods). Once the contractor starts cutting out and replacing pipe, you're in permit territory.
Is the part under the sidewalk mine?
In many cities, yes. Portland makes owners responsible for the line from the house to the curb, and Seattle makes owners responsible all the way to the connection at the main (Portland; Seattle). Check your own utility's map or rules before you assume the city will pay.
Do I have to replace my sewer line to sell my house?
Only where a point-of-sale rule applies, like the East Bay's. There, you need a certificate showing the lateral doesn't leak, or a time extension, before the title transfers (EBMUD). Where no rule like that exists, ask your local sewer utility, and expect that a buyer may still ask for a camera inspection.
Who is allowed to work on my sewer line in Portland?
Portland says only the property owner or a licensed plumbing contractor can legally work on the sewer line (Portland.gov).
Bottom line
A sewer line replacement usually needs a plumbing permit for your lot and a right-of-way permit for the street side. Call 811 before digging, keep the trench open until inspection, and ask about point-of-sale rules if you are selling. Start with our 10-minute AHJ permit checklist.
Last checked: October 2026.
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