Quick answer
- A plumbing permit is required to replace or reline a sewer lateral
- Work in the street/sidewalk often needs a separate encroachment (ROW) permit
- Proper slope, cleanouts, and approved materials are inspected
- Some jurisdictions require a camera verification and/or backwater valve
- Right-of-way rules vary widely — verify with your city or county
When this applies
Replacement, trenchless, and relining
Dig-and-replace, pipe bursting, and cured-in-place lining all need a permit. A one-time drain cleaning does not — but repeated main-line backups often point to a lateral that needs permitted work.
How it works
Two permits, sometimes
The plumbing permit covers the lateral on your property. If the repair reaches the public right-of-way or the connection to the city main, an encroachment permit (with traffic control and restoration requirements) is typically required as well. We pull both.
What the inspector verifies
Slope/fall, approved pipe and fittings, cleanout locations, proper bedding and backfill, and — where required — a backwater valve and a camera scope confirming the finished line.
What to watch out for
Ignoring the right-of-way permit
Work in the street without an encroachment permit can mean stop-work orders, fines, and re-doing restoration. The ROW process exists for good reason and varies by city.
Bad slope or missing cleanouts
Incorrect fall causes recurring clogs; missing cleanouts make future service harder. Permitted work is inspected to prevent both.
Sewer line failing? We pull the permits and verify the repair on camera.
Frequently asked questions
Why might a sewer job need two permits?
The plumbing permit covers the portion on your property. If the work reaches the public right-of-way or the city main, most jurisdictions also require an encroachment / right-of-way permit. We pull whatever the job needs.
Does a trenchless repair still need a permit?
Yes. Pipe bursting and cured-in-place lining are permitted work and inspected, just like a traditional dig-and-replace.
Will the city verify the finished line?
Many jurisdictions require a camera scope and check slope, cleanouts, and (where applicable) a backwater valve before finaling the permit.
Keep exploring
Reviewed by John Stevenson Plumbing, Heating & Air. Based on California Plumbing Code requirements for building sewers (slope, cleanouts, approved materials, inspection) plus typical municipal encroachment / right-of-way permitting for work in public streets, and our local sewer experience. Right-of-way rules vary significantly — confirm with your city or county. Last updated 2026-06-25.