ADU Construction In California: 2026 Costs, Permits, Design Ideas & What Homeowners Need To Know

Quick Answer Construction of the accessory dwelling unit in California in 2026 costs between $150,000 and $400,000 based on the kind and quality of the construction; the conversion of garages will cost less than the detached accessory units. The homeowners have to apply for construction permits, adhere to the accessory dwelling unit laws in California, […]