How to Build an ADU in California (2026 Complete Guide to ADU Construction)

Modern detached ADU under construction in a California backyard — Urbatect design-build project

How to Build an ADU in California 2026 Complete Guide to ADU Construction Building an ADU in California has become one of the most impactful ways homeowners expand livable space, increase property flexibility, and adapt to changing family needs. Whether you are considering building an ADU in your backyard, planning a detached structure, or researching […]