Urban Lot Split and Two Unit Developments
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On September 16, 2021, the Governor signed into law Senate Bill (SB) 9, the “California Housing Opportunity and More Efficiency (HOME) Act.” SB 9 requires cities to ministerially approve a parcel map for an urban lot split and/or a proposed housing development containing a maximum of two residential units within a single-family residential zone.
SB 9 amends the Subdivision map Act and the California Planning and Zoning Law to ministerially approve a housing development containing up to two residential units on a lot in single-family residential zones, and permitting a lot split of a single-family zoned lot, which effectively expands the potential density of the original single-family lot from three units (assuming a primary unit, JADU and detached ADU) to four units.
SB 9 aims to alleviate the housing crisis facing cities across California by providing new ways to increase housing supply and diversify the types of housing available.
The City of Sierra Madre adopted Ordinance No. 1452 on April 12, 2022, implementing processes and regulation for Urban Lot Splits and Two Unit Developments, in compliance with SB 9.
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Key Components of SB 9
| Urban Lot Split |
Two Unit Developments |
| Provides a streamlined process for subdividing an existing single-family zoned lot into two new parcels, also known as an Urban Lot Split |
Provides a streamlined process for creating Two Unit Developments on single-family zoned lots |
| Added Chapter 16.18 (Urban Lot Split) to the Sierra Madre Municipal Code implementing regulation, procedure and standards for subdivision of an eligible single-family property |
Added Chapter 17.59 (Ministerial Design Review) to the Sierra Madre Municipal Code implementing the regulation, procedure and standards for Two Unit Development of an eligible single-family property |
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