42Floors is launching today to help business owners find commercial real estate online. The YCombinator startup, founded in November 2011 by former Flightcaster founder Jason Freedman, connects businesses seeking space with photos, data and other listing info on available spots. Currently active in San Francisco, the company plans to expand across the U.S. later this year. Freedman said he’s providing to business owners what tools like Zillow have provided to residential real estate searchers for years. “Commercial real estate has always trailed residential real estate in technology by at least five years,” Freedman said in an interview.