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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.

02

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

03

Run scenarios

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

Bay Area embracing ADUs amid housing crisis - are they worth the investment? - ABC7 San Francisco

abc7news.com · Jul 30

ADU News

Accessory Dwelling Units (ADU) Are All The Rage In California, But Slow To Catch On Everywhere Else

housingnotes.com · Jul 26

ADU News

San Jose becomes 1st in CA to allow property owners to sell ADUs - ABC7 San Francisco

abc7news.com · Jul 19

ADU News

Seattle's ADU boom continues, outnumbering single-family permits 2 to 1

kuow.org · Jul 17

SB 9 & Lot Splits

“Informal” Housing – It’s Not Just a Formality

cayimby.org · Jul 05

ADU News

This California city is letting owners sell ADUs as starter homes. Will it be a housing revolution?

latimes.com · Jun 14

ADU News

New planning tool arrives as California prepares for more accessory dwelling units

housingwire.com · Jun 06

ADU News

ADUs Accounted For 20% Of California's New Home Construction In 2023

finance.yahoo.com · Jun 06

ADU News

New pre-approved ADU plans now available - City of Portland, Oregon (.gov)

portland.gov · Apr 29

Legislation

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

Cities