Ownership: the whole lateral is yours
“Each property owner is responsible for the entire sewer from the house to where it connects to Central San's main sewer line.”
That includes the lower lateral under the sidewalk and street. If the connection to the main is across the street, the full run is your responsibility, which is why location matters so much on the cost page.
Permits
“When sewer work will occur outside the building, whether it is on property or off property, a Central San sewer permit is required.”
Central San also notes that repair permits are trade specific: it “can only issue the permit to a plumber or a contractor who holds an ‘A’ license” (Sewer Repairs). Work in a public street usually also needs an encroachment permit from whoever owns the road (the city, or Contra Costa County in unincorporated areas). Your contractor should confirm which applies.
Who may do the work
“Property owners may do work on their own property, provided the trench needed for the installation will not be deeper than five feet, but construction within public right-of-ways or Central San easements requires hiring a properly licensed contractor registered with Central San.”
Central San publishes a current contractor list on its Sewer Repairs page. See choosing a sewer contractor for how to vet one.
Inspections
- Give 24 hours' noticeCall the inspection hotline at least 24 hours before the requested inspection: (925) 229-7373.
- Pre-TV for pipe bursting“To obtain a pipe burst repair permit, a pre-installation TV inspection (pre-tv) is required.”
- Inspection before backfillAll sewer work outside a structure needs a permit and inspections by a Central San inspector.
- Owner permitsOwner-performed work starts with a pre-construction meeting with the inspector.
Source: Central San, Sewer Repairs.
Overflow protection device and cleanout
| # | Requirement | What Central San says | What it means for your project |
|---|---|---|---|
| Q-01 | Overflow protection device (OPD) | “Central San requires a sewer OPD to be installed in every home or property.” | If your home lacks one, expect it in the quote |
| Q-02 | Placement of the OPD | “Elevation and location are critical to its proper operation.” | Installed per District specifications; keep it clear of soil and plants |
| Q-03 | Building sewer cleanout | “Required to be installed within 2-feet of the building foundation.” | Many older homes need a new cleanout as part of the job |
Sources: Permit FAQs, OPD page, Sewer Repairs.
Selling a home: no point-of-sale ordinance
“Central San does not have a point of sale sewer lateral inspection ordinance.”
The East Bay private sewer lateral ordinance that requires inspections at sale applies to Alameda, Albany, Emeryville, Piedmont, Oakland and the Stege Sanitary District, not Central San's area (East Bay PSL). Buyers here often order a sewer scope anyway; see buying or selling.
Financing the replacement
| # | Term | Detail |
|---|---|---|
| $-01 | Single-family, 4-inch connection | Up to $12,500 |
| $-02 | Multi-family or non-residential, 6-inch | Up to $25,000 |
| $-03 | Repayment | 15 years, collected on the annual property tax bill |
| $-04 | Prepayment | No penalty for early payoff |
| $-05 | What it can cover | Central San application and inspection fees, and construction payable to third-party contractors |
| $-06 | Interest rate | Set by Central San for each program period; ask for the current rate |
Apply through Central San's Permit Contacts page (Financing Program). We don't arrange financing and can't predict approval.
Where Central San rules apply
Central San serves Walnut Creek, Lafayette, Orinda, Moraga, Pleasant Hill, Danville and nearby unincorporated communities. If you're unsure, a Central San sewer service charge on your property tax bill is a good sign. In Concord and Clayton, confirm with your city who maintains and permits your sewer before relying on this guide.
Ready for numbers? Read the cost guide, then the contractor checklist.
Questions homeowners ask
Who owns the sewer lateral in Central San territory?
The property owner. Central San: “Each property owner is responsible for the entire sewer from the house to where it connects to Central San's main sewer line” (Permit FAQs).
Do I need a Central San permit to replace my sewer line?
Yes, for any sewer work outside the building, on or off your property (Sewer Repairs).
Does Central San require a sewer inspection when I sell my house?
No. “Central San does not have a point of sale sewer lateral inspection ordinance” (Permit FAQs). Buyers often order a scope anyway.
What is an overflow protection device?
A fitting near the cleanout that lets a backup spill outside instead of into the house. Central San: it “can prevent sewage from entering your home or business and reroute the spill to outside your building,” and its “elevation and location are critical to its proper operation” (OPD page).
What is the current Central San financing rate?
Central San sets the rate for each program period, so check with Central San directly. The program terms we can confirm: up to $12,500 (4-inch) or $25,000 (6-inch), 15 years, on the property tax bill, no prepayment penalty (Financing Program).
Sources
- Central San: Permit FAQs
- Central San: Sewer Repairs (permits, cleanouts, OPDs, inspections)
- Central San: Overflow Protection Device
- Central San: Sewer Overflow Prevention
- Central San: Sewer Lateral Replacement Financing Program
- East Bay Private Sewer Lateral program (EBMUD region)
Rules and programs change. Confirm current requirements with the agency before you start work.