Can I get an ADU Feasibility Consult if my primary residence is on a septic system?

Yes, if you have confirmed that you can build on your current septic system or are able to upgrade it as needed for an ADU! If your house is on a septic system, please contact the local septic agency to find out if you can add an ADU to your property before scheduling your ADU Feasibility Consultation.

• For Sonoma County please contact Permit Sonoma Well & Septic at PermitSonoma-Well-Septic@sonoma-county.org or at (707) 565-2849
• For Napa County please contact the Napa County Environmental Health Division at Environmental@countyofnapa.org or at (707) 253-4417
• For further discussion of septic issues, check out our blogpost "What's the deal with septic systems?" over at our ADU Info Center.