Long-form guides to the practical questions that come up during every California ADU project. No fluff, no upsell — just what we wish we'd known before starting.
Building an ADU costs $150,000–$400,000 in California. Most homeowners don't have that sitting in cash. This guide covers every realistic financing path — what …
California state law requires every city to approve a code-compliant ADU within 60 days of a complete application. "Complete application" is the key phrase — mo…
ADU construction is a $200,000–$400,000 transaction with one of the highest fraud rates in residential construction. Florida and California consistently top con…
The prefab vs custom ADU question is mostly answered by your lot and your appetite for design choices. Prefab is faster, more predictable, and 10–25% cheaper. C…
California permitted 198,026 accessory dwelling units between 2013 and 2025 across 475 cities — and 2025 set a new all-time high at 37,438 city-issued permits (…
Governor Newsom signed the 2026 housing bills on September 27 and 29, 2026. Seven of them change what a California homeowner can build, what a city can charge, …
Assembly Bill 956 (Quirk-Silva, Chapter 791 of 2026) was signed on September 29, 2026 and takes effect on January 1, 2027. It raises the number of detached ADUs…
Senate Bill 1117 (Cervantes, Chapter 809 of 2026) was signed on September 29, 2026 and takes effect on January 1, 2027. For up to two ADUs on a lot, it removes …
Assembly Bill 1621 (Wilson, Chapter 780 of 2026) was signed on September 29, 2026 and takes effect on January 1, 2027. It amends the state's rules for housing-r…