Construction Permits & Connection Information

NapaSan's engineers work with businesses to ensure that their project can safely connect to the sewer system. When you apply for a permit at the City or County of Napa, if your project is in the NapaSan service area you may be directed to bring your project designs to NapaSan as well. This also applies to any type of changes a business owner might make to their sewer lines, or creation modification to tenant spaces.

The process for connecting to the  sewer system is guided by NapaSan’s Code. All sewer design and construction must conform to the ordinance and NapaSan’s Sanitary Sewer & Recycled Water Standards. Permits and processes described on the pages linked below are intended to be general information for typical applications. Please contact NapaSan Engineering staff at (707) 258-6000 for additional information or clarifications.

Permits for New Construction, Replacement & Repair

This section is where you can find information on permits for the repair or replacement of private lateral lines, permits needed for new construction and demolition permits.

Sewer Connection Information

This is where you can find information on the Standard Specifications for connecting a new project to the sewer system, converting septic systems to a sanitary sewer connection, and annexation into the NapaSan service area.