What Is SB9 and Why It Matters in Los Angeles
SB9, or Senate Bill 9, is a California state law passed in 2021 that allows homeowners to split their single-family lots and build up to four units on what was traditionally zoned for one home. For Los Angeles homeowners, this law opens the door for creative, affordable housing solutions like duplexes and ADUs (Accessory Dwelling Units) without needing rezoning approval.
SB9 is a response to the state’s housing shortage, aiming to increase density and affordability in established neighborhoods. At Aventiq Development, we help L.A. property owners navigate SB9 construction opportunities to maximize property use and investment.
Key Provisions of SB9 for Los Angeles Residents
Here are some highlights of what SB9 allows:
- Lot Splits: Homeowners can divide a single-family lot into two legal parcels, creating the potential to build separate dwellings on each.
- Duplex Development: Each parcel may contain two residential units, meaning up to four units total (2 per lot).
- No Local Discretion: Cities must approve qualifying SB9 projects ministerially, meaning without public hearings or discretionary review.
- ADU Compatibility: SB9 development can often be combined with ADU construction for even more flexible housing options.
SB9 Construction Requirements and Eligibility
To take advantage of SB9, the property must meet certain conditions:
- Located in a single-family residential zone
- Not within certain restricted areas (e.g., historic districts, high fire zones, wetlands)
- Owner must intend to occupy one of the units for at least three years (lot split requirement)
- Cannot have previously used SB9 on the parcel
Navigating these rules can be complex. Aventiq Development ensures your project complies with both SB9 and Los Angeles zoning ordinances.
What You Can Build Under SB9
Depending on your lot size and layout, SB9 allows various configurations:
- Two detached homes on one lot
- A duplex on a single lot
- Lot split with one or two homes per new parcel
- Combination of duplexes and ADUs (where compatible)
We provide architectural planning and feasibility studies to determine the best use of your property.
Benefits of SB9 Construction in Los Angeles
SB9 empowers homeowners to:
- Generate rental income through added units
- Increase property value with multiple residences
- Provide housing for family without sacrificing privacy
- Help alleviate the housing crisis in their community
With high demand for rental units in L.A., SB9 construction is both a financial opportunity and a civic contribution.
Aventiq Development: Your SB9 Construction Partner
As a Los Angeles-based firm specializing in new construction and ADUs, Aventiq Development helps homeowners at every stage of the SB9 process:
- Feasibility and zoning review
- Architectural design and engineering
- Permit processing and compliance
- Full-service construction management
We take a tailored, hands-on approach to ensure your project stays compliant, cost-effective, and on schedule.
Frequently Asked Questions About SB9 Construction
Can I sell the new unit separately after a lot split?
Yes, but only if the lot is legally subdivided under SB9 rules. You can then sell each parcel independently.
Can I still build an ADU if I develop under SB9?
It depends on how your project is configured and local interpretations. Some combinations are allowed, and we help explore every possibility.
How long does an SB9 project take from start to finish?
On average, 6–12 months, depending on lot conditions, permitting timelines, and construction complexity.
Ready to Start Your SB9 Construction Project?
If you’re interested in exploring what SB9 construction can do for your Los Angeles property, contact Aventiq Development for a consultation. We’ll evaluate your property, walk you through your options, and manage the entire process—from concept to completion.
Call us today and take the first step toward unlocking your property’s full potential.
