Sustainable Development Area (SDA)
Build unlimited ADUs on your property through San Diego's Bonus ADU Program. For every affordable unit you build, earn the right to add a market-rate one—with no cap on total units.
What is the SDA Program?
The Sustainable Development Area (SDA) is a San Diego-specific incentive zone designed to dramatically increase housing production. Properties within designated SDA boundaries gain access to the city's Bonus ADU Program, which removes the traditional cap on the number of ADUs you can build.
Under standard California law, homeowners can build 1–2 ADUs by right. But in an SDA zone, the rules change entirely: for every deed-restricted affordable unit you add, you can also build one market-rate unit—and there's no maximum on how many pairs you can create. Your only constraint is the available buildable area on your lot.
Affordable units must be deed-restricted for a maximum of 15 years, ensuring they remain accessible to lower-income residents during that period. After 15 years, the deed restriction expires and the owner regains full flexibility over rent pricing.
Why SDA is a Game-Changer
Properties in SDA zones unlock development potential that's impossible anywhere else in the city.
Unlimited ADUs
No unit cap on your property. Build as many ADUs as your lot’s buildable area allows—far beyond the typical 1–2 unit limit.
Massive Income Potential
Multiply your rental income streams. Each additional unit generates $1,500–$3,500+/month depending on size and finishes.
1-for-1 Affordable Bonus
For every deed-restricted affordable unit you build, you earn the right to build one market-rate unit—with no ceiling on total count.
Streamlined Approvals
SDA projects benefit from ministerial (by-right) approval pathways, bypassing lengthy discretionary review processes.
Relaxed Zoning Standards
Reduced setbacks, increased height allowances, and waived parking requirements make more of your lot developable.
Community Impact
Directly contribute to San Diego’s housing supply while building generational wealth for your family.
How the 1-for-1 Bonus Works
A simple formula that rewards housing production: match each market-rate unit with an affordable one.
Check Eligibility
Your property must be located within a designated Sustainable Development Area. Density instantly identifies if your parcel qualifies.
Plan Your Build
Design your ADU project. For every market-rate unit, include one deed-restricted affordable unit. Our tools help you maximize buildable area.
Deed-Restrict Affordable Units
Affordable units must be deed-restricted for a maximum of 15 years, ensuring they remain accessible to lower-income tenants during that period.
Submit & Build
Leverage the ministerial approval pathway for faster permitting. No discretionary hearings—just submit plans that meet objective standards and build.
SDA vs. Standard Zoning
See how SDA properties dramatically outperform standard zoning rules.
Real-World Example
Standard Zoning
With SDA Bonus
Limited only by buildable area
Frequently Asked Questions
What qualifies as an ‘affordable’ unit under SDA?
How long does the deed restriction last?
Can I build market-rate-only ADUs in an SDA zone?
Does the SDA program stack with other incentives?
What happens if my property is in both an SDA and Complete Communities zone?
Is Your Property in an SDA Zone?
Enter your address on Density and we'll instantly tell you if you qualify for unlimited ADUs through the SDA program.
Check My Property