Making Big Sense of Small Homes

8 Domains of Livability Case Studies, August 2015

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Accessory Dwelling Units

This case study profiles efforts in Portland, Oregon, to remove regulatory and financial barriers to accessory dwelling unit (ADU) construction. It highlights zoning changes that increased the permissible size of ADUs and a decision to waive system development charges for ADUs. 

Portland, OR

2010 Population: 583,776

2010 Population Density: 4,375.25/square mile