San Diego Passes Stricter ADU Guidelines to Limit Density and Preserve Neighborhood Character
In a significant policy shift, the San Diego City Council has approved new, more restrictive guidelines for building Accessory Dwelling Units (ADUs). The changes, passed on Monday night, are aimed at curbing overdevelopment in residential neighborhoods while balancing the need for affordable housing.
What’s Changing?
The updated regulations will only apply to future ADU developments, leaving existing projects or those already under construction unaffected.
One of the most notable revisions is the removal of bonus ADU allowances from single-family (RS) zones. These bonus units, often used to create additional affordable housing, had previously allowed developers to build multiple units per lot in certain areas.
Why the Change?
Zach Collins, Chief ADU Consultant at ADU Geeks, said the amendments reflect growing concern from local communities about overcrowding, lack of parking, and changing neighborhood aesthetics.
“This is going to help protect communities by reducing property density,” Collins stated. “It’s a move to balance development with preserving the feel of our neighborhoods.”
Additional Restrictions
Off-street parking is now mandatory for many new ADUs.
Fire safety regulations have been strengthened, especially in cul-de-sacs and areas with limited access routes.
A new development impact fee will apply to bonus ADUs to fund infrastructure improvements such as plumbing and utility upgrades.
Impact on Developers
Previously, developers were able to take advantage of zoning loopholes to build dozens of ADUs on large lots in areas like Encanto. Those opportunities are now significantly reduced.
“It used to be a gold mine,” Collins explained. “But these new rules will ensure a more sustainable, community-first approach to housing.”
A Compromise for All Sides
Despite the limitations, Collins believes the new guidelines could strike a fair balance.
“We’re still helping address the housing crisis while maintaining the character of neighborhoods,” he said. “It’s a compromise that gives something to both sides of the debate.”
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