CHAMPAIGN-URBANA: Since the housing market crashed in 2007, the cities of Champaign and Urbana have received more than $2 million in state and federal dollars to combat vacant and nuisance housing. Yet the number of empty houses is still climbing. As of 2014, one in every 10 housing units in Champaign County sat vacant, according to the most recent U.S. census data available. That total number, 8,700, was nearly double the number of vacant housing units in the year 2000. Each year, Champaign puts at least $20,000 into demolishing homes across the city.