This will certainly help address the needs of future electric car owners who don't live in a house with a garage. The 20 percent plan was double the original proposal's 10 percent installation rate. Developers will have 18 months before they have to start installing the charging stations, which cost $500-$2,000 each. The problem of charging still persists for those living in existing buildings. Those people may decide they're better off moving to a new place, and if the trend becomes big enough, it may prompt management companies to retrofit existing facilities.