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01

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Enter a property address in California, Florida, or Texas. We pull parcel data from county records in seconds.

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Zoning, setbacks, lot dimensions, assessed value — plus what state and local law allows you to build.

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ADU, duplex, lot split, multi-unit — see what's possible on your lot with development rules calculated.

Who This Is For

Homeowners

"Can I add a second unit to my backyard?"

Investors

"How many units can I build on this SB 9 lot split?"

Builders & Architects

"What's the max buildable envelope under current zoning?"

Housing News

ADU permits, zoning reform, building code updates — everything builders, architects, and developers need to know.

ADU News

Placer County adds new ADU plan - Placer County Website (.gov)

placer.ca.gov · Mar 21

ADU News

Senate Approves Accessory Dwelling Unit Mandate

loudounnow.com · Feb 12

ADU News

New Report Highlights Success of Policies Legalizing More Homes

cayimby.org · Jan 25

ADU News

New California law would allow separate sales of ADUs — if cities and counties opt in

kpbs.org · Dec 22

ADU News

Not your grandma’s granny flat: How San Diego hacked state housing law to build ADU ‘apartment buildings’

calmatters.org · Nov 28

ADU News

Could ADUs help solve California’s housing crisis?

calmatters.org · Nov 28

ADU News

ADUs Can Now Be Sold Separately In California

nationalmortgageprofessional.com · Oct 20

SB 9 & Lot Splits

AB 881

cayimby.org · Oct 19

ADU News

Accessory Dwelling Units

santa-ana.org · Sep 29

Legislation

SB 9 Duplex + lot split
ADU Up to 1,200 sf
SB 1211 Multiple ADUs

Cities