ADUniverse: Creating a Tool to Support Homeowners Interested in Building an ADU

September 2019

By: Nick Welch, Seattle City Planning, Univ of Washington
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Accessory Dwelling Units

This website describes an effort to build a tool to help Seattle residents evaluate opportunities to build accessory dwelling units (ADUs). It describes the motivation, data collection and processing, methods, and results of the project. And it includes a GitHub link where others can download the files necessary to recreate the tool for free. 

Seattle, WA

2010 Population: 608,660

2010 Population Density: 7,250.87/square mile