RE "...And since supply is low and prices are high....." What exactly is constraining supply of new dwellings.? What is being done to create supply? How did

RE "...And since supply is low and prices are high....." What exactly is constraining supply of new dwellings.? What is being done to create supply? How did this low supply come about. Most likely a series of several events has existed to several degrees for several years to create the supply issue. In my area vacancy rate can be used to measure supply. A vacancy rate of 3% is regarded as fair supply balance between property owners and people wanting to rent. Currently in my area supply is 0.8% - this means there is many more people seeking to rent a house that houses actually available for rent. In my area , the housing crisis is attributed ( in my opinion ) to certain government policies ( federal , state, local government ) policies.