With the right policies in place, basement apartments, converted garages, and backyard cottages can create a significant number of affordable housing units.
![Dark grey two-story accessory dwelling unit in backyard](/files/styles/featured_small/public/images/shutterstock_2092923757.jpg.webp?itok=xEA_I2Qr)
In an op-ed in Governing, Emily Hamilton outlines the results of her research into how accessory dwelling units (ADUs) can play a role in easing the housing crisis and the policies cities and states can leverage to encourage ADU construction.
“At one end of the spectrum, California policymakers have gone the farthest to protect homeowners’ right to build ADUs. On the other, New Hampshire policymakers legalized ADUs but left open the opportunity for local zoning ordinances to put many limits on them,” Hamilton explains. Even in California, owner occupancy requirements limited ADU construction until 2017, when a series of state laws limited the power of cities to regulate ADUs and led to an “impressive surge” in ADU permits.
Regulations and policies aren’t the only things that have an impact on ADU production, however. “Two other key determinants of ADU construction — and of its potential to lower prices in a given city or neighborhood — are how easy it is to adapt the existing housing stock to include them and the willingness of local homeowners to take the leap to build them.” Hamilton adds that in New Hampshire, where localities have a lot of leeway in restricting ADUs, some cities are seeing a high rate of permitting in part due to the state’s older population and the adaptability of existing housing stock.
Hamilton concludes that, with the right policies in place, ADUs “may be the least contentious way to create opportunities for more housing within existing residential neighborhoods.”
FULL STORY: The Role of ADUs in Easing America's Housing Crisis
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‘Forward Together’ Bus System Redesign Rolling Out in Portland
Portland is redesigning its bus system to respond to the changing patterns of the post-pandemic world—with twin goals of increasing ridership and improving equity.
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Plan to Potentially Remove Downtown Milwaukee’s Interstate Faces Public Scrutiny
The public is weighing in on a suite of options for repairing, replacing, or removing Interstate 794 in downtown Milwaukee.
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Can New York City Go Green Without Renewable Rikers?
New York City’s bold proposal to close the jail on Rikers Island and replace it with green infrastructure is in jeopardy. Will this compromise the city’s ambitious climate goals?
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700-Acre Master-Planned Community Planned in Utah
A massive development plan is taking shape for lakefront property in Vineyard, Utah—on the site of a former U.S. Steel Geneva Works facility.
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More Cities Ponder the End of Drive-Thrus
Drive-thru fast food restaurants might be a staple of American life, but several U.S. cities are actively considering prohibiting the development of new drive-thrus for the benefit of traffic safety, air quality, and congestion.
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Air Pollution World’s Worst Public Health Threat, Report Says
Air pollution is more likely to take years life off the lifespan of the average human than any other external factor, according to a recent report out of the University of Chicago.
Placer County
City of Morganton
HUD's Office of Policy Development and Research
Dongguan Binhaiwan Bay Area Management Committee
City of Waukesha, WI
Los Angeles County Metropolitan Transportation Authority
Indiana Borough
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