Sonoma County, CA Home Business: Zoning Restrictions (2026)

Sec. 26-88-121 allows home occupations as an accessory use in agricultural, residential, planned community, and certain commercial zones. Permitted activities include art and craft work (ceramics, painting, photography, sculpture, woodwork — quiet cottage industries with no hazardous quantities), office-based professional services (architects, attorneys, consultants, e-commerce), one-on-one instruction (music, art, dance, tutoring, counseling, licensed massage), tailoring, and similar uses approved by the planning director. PROHIBITED activities include animal services, automotive repair, food processing, hair salons, medical procedures, hazardous-materials handling, welding, and any use requiring ADA modifications to the dwelling. Operational standards: (1) only residents of the dwelling may be employed in the business — no outside employees on-site; (2) maximum 4 customers per day with no more than 2 simultaneously, restricted to 8:00 a.m. to 6:00 p.m. Monday through Friday; (3) maximum 10 deliveries per week; (4) the business may occupy up to 25% of the dwelling floor area, plus up to 500 sq. ft. in a garage or accessory structure; (5) one non-illuminated sign of 2 sq. ft. maximum; (6) NO outside storage of equipment, inventory, or materials; (7) parking must comply with Sec. 26-86-010; (8) no change to the residential character or appearance of the dwelling; (9) no commercial-grade utility upgrades beyond normal residential need.