"The national shortage of affordable housing has made accessory dwellings an important component of the housing strategy of many communities. Accessory dwellings help increase the supply of affordable housing without government subsidies, increase the overall housing stock, and facilitate elders’ ability to age in place. To promote the creation of accessory dwellings, four states (California, Massachusetts, Vermont and Washington) have enacted laws encouraging or requiring localities to amend their zoning ordinances to permit homeowners to add accessory dwellings. Below is information on those state laws and some links to further information."
2008_ADU laws in other states
