SB 9 Los Angeles Information Guide for ADUs Owners
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SB 9 Los Angeles Information Guide for ADUs Owners

|Jan 23, 2024

Venturing on the journey of constructing additional living spaces in Los Angeles, such as prefab homes in Los Angeles, office sheds, and prefab sheds, requires a comprehensive understanding of Senate Bill 9 (SB 9). As homeowners seek to enhance their properties with versatile structures, the intricacies of SB-9 Los Angeles county play a pivotal role. In this guide, we will delve into the specifics of SB 9, demystifying the process for building prefab homes and sheds in Los Angeles. From navigating regulations to optimizing the potential of office sheds, this article aims to provide a clear roadmap for homeowners venturing into the realm of prefab construction in the vibrant city of Los Angeles.

What is SB 9 in LA?

Senate Bill 9, also known as SB 9, came into effect in California on January 1, 2022, with the aim of addressing housing challenges by encouraging the development of what's termed 'missing middle housing' within single-family residential areas. This legislation introduces changes that permit the creation of up to two residential units on a single-family-zoned lot and also allow for an urban lot split of a single-family-zoned lot.

The key feature of SB 9 in Los Angeles is its introduction of a ministerial process for approval, eliminating discretionary reviews and public hearings. The approval process for two-unit developments and urban lot split parcel maps adheres to specific eligibility criteria for lots designated for single-family residential uses. In simple terms, this means that the approval process is more straightforward and administrative, based on clear and objective standards.

In the context of Los Angeles, SB 9 provides an avenue for eligible property owners to subdivide their lots into two separate parcels, giving them the opportunity to construct up to two additional residential units on each of these new parcels. It's a way to make more efficient use of available space and increase housing density.

However, it's important to note that there are restrictions on this law. SB 9 applies primarily to areas with minimal environmental and hazard conditions, excluding certain zones, such as coastal areas or wetlands, where the law does not apply. SB 9 in Los Angeles county offers an exciting opportunity for homeowners, but navigating its details wisely ensures compliance and a smoother process.

What is SB 9 in LA?

Things to Know about SB-9 Los Angeles When Building ADUs in LA

Navigating the construction of Accessory Dwelling Units (ADUs) in Los Angeles under Senate Bill 9 (SB 9) involves understanding critical nuances that can impact the process. Here's an enhanced overview of key considerations:

1. Lot Splits for Enhanced Land Use

SB 9 introduces the provision for lot splits, empowering homeowners to subdivide lots originally designated for single-family residences into two distinct parcels. This paves the way for optimized land use and increased housing opportunities in designated areas.

2. Duplex Residences for Expanded Living Spaces

The legislation not only allows lot splits but also facilitates the creation or construction of duplex residences on each of the resulting lots. This means property owners can explore the development of two units on a single lot, contributing to the diversification of housing options.

Duplex Residences for Expanded Living Spaces

3. Streamlined Approval with the Ministerial Process

A noteworthy aspect of SB 9 is the requirement for local municipalities to approve lot splits and duplex construction through a ministerial process. This signifies a more efficient approval mechanism, bypassing prolonged reviews or hearings and expediting the realization of housing projects.

4. Setback Requirements for Adequate Space

Each subdivided lot is subject to setback requirements, ensuring a 4-foot distance from both side and rear boundaries. This regulation aims to maintain a balanced spatial arrangement and harmony within the community.

Setback Requirements for Adequate Space

5. Parking Provisions Aligned with Transit Accessibility

SB 9 in Los Angeles mandates the provision of one off-street parking space for each lot, with exceptions made in areas near transit hubs. This aligns with efforts to promote sustainable transit options and acknowledges the diverse transportation needs of different neighborhoods.

6. Owner Occupancy Requirements

To preserve community stability, SB 9 mandates that the current property owner must occupy one of the two lots for a minimum of three years. This requirement aims to discourage speculative practices and promote a sense of rootedness within the community.

7. Rental Restrictions for Long-Term Stability

Units created under SB 9 in Los Angeles are subject to rental restrictions, prohibiting them from being rented for periods of less than 30 days. This safeguard is in place to encourage the establishment of stable, long-term residential communities.

Rental Restrictions for Long-Term Stability


1. What is SB 9, and how does it apply to the City of Los Angeles?

SB 9 City of Los Angeles is a state law that enables homeowners in Los Angeles to build additional residential units on their properties. It allows for lot splits and the construction of duplex residences, promoting increased housing density.

2. Can I use SB 9 to build a backyard office shed in the City of Los Angeles?

While SB 9 primarily focuses on residential units, it can indirectly benefit homeowners looking to construct versatile spaces like backyard office sheds. The legislation opens possibilities for innovative use of space within the city.

3. Is SB 9 applicable to the construction of prefabricated granny flats in Los Angeles?

Absolutely. SB 9 facilitates the development of additional residential units, including prefabricated granny flats. This offers homeowners an opportunity to enhance their properties with flexible and functional living spaces.

4. What are the advantages of a prefab ADU under SB 9 in the City of Los Angeles?

Building a prefab ADU (Accessory Dwelling Unit) under SB 9 provides a streamlined process for homeowners. It offers a cost-effective and efficient way to add living space to their properties, contributing to the city's housing goals.


Senate Bill 9 (SB 9) unlocks exciting possibilities for LA homeowners. From backyard offices and prefab ADUs to granny flats and duplexes, this innovative law empowers you to transform your property and contribute to vibrant, sustainable living in the city. Remember, SB 9 goes beyond bricks and mortar. It's about building spaces that align with your evolving needs and enhance the neighborhood character. For expert guidance, tap local resources or the City Planning Department. Embrace SB 9's potential! Shape your property, enrich your life, and contribute to the thriving cityscape.

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