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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

Some Wisconsin communities hope granny flats can alleviate the housing shortage

wpr.org · Sep 19

ADU News

Harrell Proposal Would Relax Accessory Dwelling Unit Rules, Implement State Law

theurbanist.org · Sep 18

ADU News

What is the new California ADU Law?

nixonpeabody.com · Sep 09

ADU News

The Accessory Success Story: How San Diego Builds Multi

cayimby.org · Aug 30

ADU News

California Legislature Passes Bill to Increase Multifamily ADUs

cayimby.org · Aug 29

ADU News

Governor Newsom Signs Law to Accelerate Accessory Dwelling Units

cayimby.org · Aug 27

ADU News

California’s decade-long effort to legalize ADUs offers lessons for other US states and regions

brookings.edu · Aug 21

ADU News

San Jose ADU law brings back starter homes - San José Spotlight

sanjosespotlight.com · Aug 15

ADU News

Community Planning Collaborative’s new ADU portal launches in California - The Architect’s Newspaper

archpaper.com · Aug 08

Legislation

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

Cities