nationwide are converted from commercial properties. and across the river in arlington, virginia, the city is trying to get get ahead ofs i its empty office space problem at 22%. i m sitting right today in northeastern s d.c. campus. last year university was not allowed to take up space in an office building. reporter: thanks to new city zoning laws, that s now possible along with seven new types of dmeshl businesses like animal boarding, hydroponic farms andic the ball. it s already happening in south jersey. this 22,000-square foot pickle ball facility was a vacant coat fac factory. regional mall van can sit is at a record high. i think we had more opportunity than we thought there would be in the market. reporter: pickle ball is the fastest growing sport in