Based in San Francisco and founded in 2004, Recurve (formerly Sustainable Spaces) is the leading provider of home performance services, helping homeowners and homebuilders create homes that are comfortable, healthy and energy efficient. A licensed general and solar contractor, the company specializes in home energy audits and green energy remodeling for existing homes. Recurve applies building science to quantitatively analyze a home’s performance as a dynamic system, so as to tailor a solution to the client's goals, budget, and priorities. The company has been recognized by the U.S. Green Building Council as the case study in their REGREEN Green Remodeling Best Practice Guidelines.