California Housing Bills Become Law

In California, major transit cities must designate regional hub districts by Mid-Q3 2027, opening qualifying housing projects to ministerial approval with no environmental review.
California expanded statewide ministerial approval for qualifying townhomes, two detached ADUs, and small-lot starter-home projects while adjusting fees on larger accessory units.
Permit rules tightened statewide: applicants can request good-faith improvement cost estimates within 30 business days, and jurisdictions generally have a >2 plan-check cap.
Other California changes strengthened density bonuses, expanded starter-home subdivision eligibility, and standardized factory-built housing rules by limiting stricter local standards and some fees.
Most new California housing laws took shape in Late-Q3 2026 and are set for Early-Q1 2027, though some construction-defect and code reforms fell short.