“A lot of people don’t realize, one of the reasons that certain communities in this country don’t have enough homes is because it’s literally illegal to build the kinds of homes that people could live in,” Fraser said on Friday.

In much of the country, zoning restrictions mean developers are only allowed to build either single-family homes or condo towers in residential areas. There is a huge chunk of housing options, often referred to as “missing middle housing,” that does not get built.