SB 9

SB 9 is codified largely in Government Code Sections 65852.21 (duplexes) and 66411.7 (urban lot splits). It applies to most single-family zoned parcels in urbanized areas, subject to conditions like minimum resulting lot size (generally 1,200 square feet), owner-occupancy affidavits, and objective development standards set by the local jurisdiction.

Cities across Placer, Sacramento, and El Dorado counties have adopted local SB 9 standards — setbacks, parking, utility-connection rules — that materially affect which specific lots actually qualify and how many net-new units are realistic. Zoning alone doesn't guarantee SB 9 eligibility.

SB 9 eligibility can meaningfully raise a lot's value to a builder or investor, but confirming eligibility — lot size, historic-district exclusions, environmentally sensitive area exclusions, HOA restrictions — takes real diligence. Many owners of qualifying lots choose to sell as-is and let the buyer pursue the entitlement rather than doing it themselves.