Want to see if it makes sense for you to build an ADU?
The San Diego ADU Market in 2026: Trends, Costs, Laws & Opportunities
ADU permits in San Diego are at record levels. Here's what's driving demand, what it costs to build in 2026, and how new state laws are reshaping the local housing market.
SB9 Vs. ADU
SB9 lets you split your lot or build a duplex, while ADUs add a separate unit without subdividing. Here's a clear breakdown of which path makes more sense for San Diego homeowners in 2026.
Companion Unit Regulation Rundown
A plain-English overview of San Diego's companion unit (ADU) rules — lot requirements, size limits, setbacks, and what changed under California's recent state law updates.
Benefits Of Building An ADU In San Diego
An ADU adds rental income, increases property value, and gives you housing flexibility — for aging parents, adult kids, or passive income. Here's a full breakdown of why San Diego homeowners build them.
New ADU Regulations Aimed At Simplifying The Process
California overhauled ADU permitting rules to make the process faster and cheaper. Here's what the new regulations changed and what it means for homeowners thinking about building in San Diego.