Five California cities have won a lawsuit against the state over SB 9, a law passed in 2021 that effectively abolished single family zoning statewide.

A Los Angeles County judge has ruled that the California law abolishing single-family zoning across the state is unconstitutional. Passed in 2021, SB 9 allowed single-family homeowners to split their lots in two and build a home on each or convert their homes to duplexes, regardless of local zoning. The ruling means SB 9 now cannot be applied in any of the five Southern California cities — Redondo Beach, Carson, Torrance, Whittier, and Del Mar — that sued the state, and the judge is expected to produce a ruling next month that will strike down the law statewide, reports Kate Talerico for the Marin Independent Journal.
“At the heart of the case is local authority and what gives the state the right to interfere. In California, the constitution requires that state laws impeding cities’ local control must demonstrate a reasonable relationship between the legislature’s stated intention and the design of the law,” Talerico writes. The stated intention for SB 9 was improving housing affordability, but the judge ruled that the legislature’s intention doesn’t match up with the design of the law because the law doesn’t require any of the resulting units to be priced below market rate.
Advocates for local authority over land use and zoning consider the ruling a big win. Housing advocates say the judge’s definition of housing affordability was extremely narrow. Talerico reports that a simple clean-up bill to SB 9, like the one proposed in the legislature last year, could “render the Los Angeles court’s decision moot.”
FULL STORY: LA judge strikes down California lot-splitting law

Planetizen Federal Action Tracker
A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

Congressman Proposes Bill to Rename DC Metro “Trump Train”
The Make Autorail Great Again Act would withhold federal funding to the system until the Washington Metropolitan Area Transit Authority (WMATA), rebrands as the Washington Metropolitan Authority for Greater Access (WMAGA).

The Simple Legislative Tool Transforming Vacant Downtowns
In California, Michigan and Georgia, an easy win is bringing dollars — and delight — back to city centers.

The Small South Asian Republic Going all in on EVs
Thanks to one simple policy change less than five years ago, 65% of new cars in this Himalayan country are now electric.

DC Backpedals on Bike Lane Protection, Swaps Barriers for Paint
Citing aesthetic concerns, the city is removing the concrete barriers and flexposts that once separated Arizona Avenue cyclists from motor vehicles.

In These Cities, Most New Housing is Under 441 Square Feet
With loosened restrictions on “micro-housing,” tiny units now make up as much as 66% of newly constructed housing.
Urban Design for Planners 1: Software Tools
This six-course series explores essential urban design concepts using open source software and equips planners with the tools they need to participate fully in the urban design process.
Planning for Universal Design
Learn the tools for implementing Universal Design in planning regulations.
Smith Gee Studio
City of Charlotte
City of Camden Redevelopment Agency
City of Astoria
Transportation Research & Education Center (TREC) at Portland State University
US High Speed Rail Association
City of Camden Redevelopment Agency
Municipality of Princeton (NJ)