City and County Resources

The best place to start getting information for your ADU project is from the County Planning Department if you live in an unicorporated area - or the Planning Department in the city in which you live. Every City and County has their own ordinances, zoning, permitting and guidelines as they relate to building an ADU so never assume something you've read or heard from somebody else will hold true in your City or Unincorporated County area. Here are several of the variables you'll want to research:

  • Site Survey Requirements
  • Engineering, Soil and Other Reports
  • Septic or Public Sewer Implications
  • Ingress and Egress, Especially for Fire Equipment
  • Fees, including Planning, Building, Public Works, Septic/Environmental Health
  • District Fees, including School, Fire Protection, Water, Sewer/Sanitation, Flood Control

Filter Resources by County

County:

RIVERSIDE COUNTY RESOURCES

SAN BERNARDINO COUNTY RESOURCES

ORANGE COUNTY RESOURCES

LOS ANGELES COUNTY RESOURCES

SAN DIEGO COUNTY RESOURCES