CA Governor Signs Housing Bills 8, 9 & 10

September 17, 2021

What is SB 8, SB 9 and SB 10? Read the full press release HERE.

*SB 8 extends the Housing Crisis Act of 2019 to jumpstart more housing production extending the provisions of the Housing Crisis Act of 2019 through 2030.*

*SB 9 gives homeowners additional tools to add critically needed new housing and help ease California’s housing shortage. It eliminates single family zoning restrictions on duplex and four-plexes.*

  • Allows property owners to have two units on a parcel zoned for single-family housing — creating a duplex — and to split a residential parcel into two pieces.

    • requires a property owner who wants to split the parcel to agree to live in one of the housing units for at least three years, unless the owner is a nonprofit. It contains important protections against the displacement of existing tenants.

      • newly formed plots to be at least 1,200 square feet in size and mandating that one parcel can’t be smaller than 40% of the original lot size.

    Excludes earthquake fault zones, historic sites/landmark districts and land within the “very high” fire hazard zones.


*SB 10 establishes voluntary, streamlined process for cities to zone for multi-unit housing — making it easier and faster to construct housing*

  • It allows, but not does require, cities to zone a parcel for up to 10 residential units if it’s located in a “transit-rich area.”

    Interested in knowing if building another unit makes financial sense for your property? Check out our app at

Written by the ADUROI Team, to help you understand if an ADU makes financial sense.

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