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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.

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

California HOA triumphs over ADU law

CalMatters Housing · Apr 06

ADU News

A new NYC house that can be yours for $100K: Designs and costs released for backyard, above-garage homes

silive.com · Mar 20

ADU News

Mayor Mamdani Unveils New Tools and Financing to Help Homeowners Add Ancillary Dwelling Units

nyc.gov · Mar 18

ADU News

Southold to hold hearings on BESS moratorium extension, ADU code changes

suffolktimes.timesreview.com · Mar 18

ADU News

Mamdani Reopens Financing for ‘Granny Flats’ in NYC After Two-Year Pause

thecity.nyc · Mar 18

ADU News

Boise offers free pre-approved ADU plans to help expand housing options

ktvb.com · Mar 17

ADU News

L.A. County Board of Supervisors approves $3.8M in funding for Eaton Fire survivors to build ADUs

ktla.com · Mar 03

ADU News

Column | Your backyard could be a home. Here’s how to build one.

washingtonpost.com · Feb 24

ADU News

A 26-year-old built a $260,000 ADU on her family's property. Now, she lives in the 748-square-foot space with her sister.

businessinsider.com · Feb 21

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Legislation

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

Cities