Permits/Connection Information

Getting wastewater from your home to Central San’s treatment plant is what we’ve done for more than 70 years. Whether you want to connect to the sewer system or see a need for a repair, Central San is there.


Operations During Shelter-In-Place Order

As social distancing requirements remain mandatory by the Contra Costa County Health Order (“Orders”), Central San will continue to limit public access to the permit counter in order to adhere to 6-foot social distancing mandates for the health and safety of the public and Central San employees.


Sewer Repairs
Sanitary Sewer Repairs - Information for Property Owners

“Who is responsible for sanitary sewer repairs?”

Central San maintains all public sewer mains within our 145 square mile service area within Central Contra Costa County. This includes over 1500 miles of pipelines, which are generally 8-inch inside diameter or greater, and located within public streets or easements dedicated for Central San’s use.


New Connections

Whether you’re a homeowner, business owner, developer, or contractor who wants to hook up to the sewer system, Central San’s permit counter can help you with the process.

Download a printable version of this page

An Applicant’s Guide to Procedures for Side Sewers Permit Process – New Connections


The construction of a new building normally requires a connection to the Central San sewer system.  Central San has developed procedures to approve the connection, collect applicable fees, and inspect the construction of any sewer facilities.


Connection Fees

Sewer connection fees are handled by Central San’s Permit Counter. While the basic fee for a residence to connect to sewer is approximately $9,000, there are many stipulations and situations that can significantly affect this figure.  For an estimated fee quote for your connection fees, please contact the Central San Permit Counter at (925) 229-7371.

For more information, please read our Overview of Central San Connection Fees fact sheet or call (925) 229-7371