California Residential Development Tool
Enter any California address. See zoning, lot data, and what state and local law allows — from ADUs to multi-unit housing.
How It Works
Enter any California property address. We search 13.1 million parcels across all 58 counties.
See your lot's zoning, dimensions, current use, and assessed value — pulled from county records.
Run development scenarios — ADU, duplex, lot split, multi-unit — with state and local rules calculated.
Coverage
58
Counties
13.1M
Parcels
100%
California
Free
To search
Who This Is For
"Can I add a second unit to my lot in Costa Mesa?"
"How many units can I build on this SB 9 lot split?"
"What's the max buildable envelope under current zoning?"