Civil-Environmental Engineering
Sierra County

Incorporated Cities (requirements may differ)​



Unincorporated Towns

Ghost Towns

Summary of Specific Requirements For Gravity Systems

for Single Family Dwellings*

The following is in addition to the items listed on the FAQ page for Gravity System Requirements.


The county follows the Uniform Building Code, with the following exceptions:


  • Setback from the high water line of intermittent streams, wetlands and swales: 50 ft. minimum


  • Setback from the high water line of perennial streams, lakes, ponds, reservoirs, and other existing or potential potable water sources:

    • Outside of Community Areas: 150 ft. minimum

    • Within Community Areas: 100 ft. minimum




Links to Sierra County Website

For County home page:

For County's Rules for

On-Site Sewage Disposal:


*The information on this page is a summary for quick reference only and may not represent the latest standards.  For complete and up-to-date information, see each counties official website.