ADU Laws

New ADU Regulations in 2023 New ADU Regulations AB 221 ADU Law AB 221 was enacted by Governor Newsom on September 28, 2012, and will take effect on January 1, 2023. The goal of this measure is to clarify existing legislation so that restrictions are easy to understand and cannot be "misinterpreted" in order to make ADU development more difficult. This new measure makes several significant modifications to the law.


ADU Laws

ADU laws are being created to address the housing crisis in California and other states.

ADUs provide an affordable housing option.

Updating ADU laws encourages more people to build ADUs.

The aim is to reduce barriers that make it difficult or impossible for homeowners to build ADUs.

Strict zoning laws and parking requirements are common barriers.

Updating these laws can make it easier for homeowners to build ADUs.

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Senate Bill 9 (SB 9) 

Senate Bill 9 (SB 9) is also known as the California Housing Opportunity and More Efficiency ("HOME") Act.

It was signed into law on September 16, 2021, as part of efforts to address California's housing crisis.

SB9 allows homeowners to subdivide their urban single-family residential lot and build additional residential units on their property.

The bill caps development at four units per property.

It applies specifically to areas zoned for single-family residential use.

SB9 requires a ministerial approval process for all proposed projects, making it a streamlined and less complex procedure.

The legislation is mandatory for all California cities and municipalities.

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Senate Bill 10 (SB 10) 

Senate Bill 10 (SB 10) provides cities with an easier path for "up-zoning" residential neighborhoods near job centers, public transit, and urban areas.

Under SB10, cities can authorize the construction of up to ten units on a single parcel without requiring an environmental review.

The bill allows the building of up to ten units per property.

Qualification requirements may be based on factors other than zoning type.

Local governments have the flexibility to choose between a ministerial or discretionary approval process.

Adoption of the plan is voluntary for local governments, requiring them to pass their own resolutions.

SB9 and SB10 both aim to facilitate ADU construction by reducing barriers and streamlining the permitting process.

It is important to consult with your local jurisdiction for the latest information on ADU laws and regulations.