California Senate Bill 9 (2021)
California legalized duplexes and lot splits on single-family lots, aiming to add housing in existing neighborhoods. The law required cities to approve certain projects ministerially, bypassing discretionary review.
Some cities resisted with local ordinances, and uptake was slow in the first year.
The law set a precedent for state-level zoning reform, but implementation barriers remain.
Like the Truman Parkway project, SB 9 tests whether small-scale infill can overcome local opposition and parking concerns.
