Updated October 2026
The Southern California programs that paid owners to rent ADUs at affordable rents are closed to new applicants or have ended. Here is where each one stands, and what still lowers the cost of adding affordable units.
The short version
- LA ADU Accelerator (City of LA): reached capacity and is not accepting new homeowners.
- Pasadena Second Unit ADU Program: up to $225,000 in 3-year, 1% construction loans. Its second round closed February 28, 2025.
- West Hollywood Affordable ADU Pilot: up to $150,000 at 1%. Closed to new applicants.
- LA County Second Dwelling Unit Pilot: a 2017 pilot that helped five homeowners build ADUs for tenants with homeless vouchers.
- CalHFA ADU Grant: up to $40,000 for predevelopment costs. Funds have been fully allocated since December 2023.
How these programs worked
Most followed one pattern. The city or county lent cheap money, or guaranteed rent, and you agreed to rent the unit to a qualifying household for a set term.
- LA ADU Accelerator didn’t fund construction. It placed tenants age 62 and older, and low-income renters, in existing permitted ADUs on five-year leases at set rents, from $1,369 for a studio to $2,735 for a three-bedroom.
- Pasadena required renting to households in the city’s rental assistance programs for seven years, owner-occupancy of the main house for at least five years, and credit and loan-to-value limits.
- West Hollywood required a seven-year rental to a Section 8 voucher holder under 50% of Area Median Income, recorded on title.
The trade was simple: cheaper money in exchange for a rent cap and less control over who moves in.
What’s current
The direct subsidies are gone for now, but state law still cuts cost:
- Since January 1, 2026, ADUs of 750 sf or less pay no development or school impact fees (SB 543).
- Since January 1, 2025, cities can’t require replacement parking for ADUs (SB 1211).
The bigger incentives for affordable housing now sit in multifamily programs. The state density bonus, expanded by AB 1287, and LA’s Citywide Housing Incentive Program reward covenanted affordable units with more density, height and less parking. See our TOC and density bonus page.
What to watch out for
Programs open and close in short rounds. Check the city’s housing department before you count on any subsidy in your budget, and read the covenant: it stays on title for its full term, even if you sell.
How we use it
Courtyard 55 in Alhambra (concept) groups 55 homes around one shared courtyard, with retail at the street. That is the scale where affordability incentives change what a site can hold. For single lots, SB 684 and SB 1123 often yield more homes than one ADU.
Have a lot in mind?
Send us the address and we’ll tell you what it can hold. Book a free consultation → · Follow @ydsarch on Instagram
