Septic Installation in San Jose, CA

Septic Installation in San Jose: local context

San Jose has dry summers and wet winters, sits in a seismically active valley with expansive clay in places, and most homes are slab or raised-foundation.

Most homes inside San Jose are on public sewer, so new septic installations in the San Jose–Sunnyvale–Santa Clara area happen mainly on the metro's outer edges and in rural parts of surrounding counties: new homes, additions that add bedrooms, and replacements of failed systems.

Soils in parts of the region include slow-draining clay that may require an engineered or alternative system and rocky or caliche soils. Septic installations need a permit, usually from the county or state health or environmental agency, and typically a soil evaluation or perc test before design. Ask installers who handles design, permits and inspections, and get the system type in writing.

Licensing and permit rules differ by state and city. Check with California licensing authorities and the local building or permitting office for what applies to your project.