Michael’s answer
Under SB 9 frameworks, certain single-family lots may qualify for lot splits or additional residential units, though local objective standards and municipal guidelines govern actual approval. In Marin County, practical feasibility often hinges on street access, utility hookups, and slope stability around hillside communities like Sausalito. A qualified land-use planner or civil engineer should verify site eligibility and municipal exceptions before breaking ground. I guide property owners and buyers through zoning rules and potential lot splits across Marin County.