“Just 14 percent of home buyers responding to the NAHB survey were willing to pay extra for a green home. But when asked a different way, more than 80 percent of buyers said they’d be willing to spend at least $1,000 more for a home that saves them $1,000 a year on their utility bills. Thirty-seven percent said they’d spend at least $10,000 extra for that $1,000-a-year savings.”