To drive up to the three- bedroom, two-bath bungalow being assembled in a historic residential neighborhood near downtown Folsom, you'd never suspect it's anything monumental.

The ambition is lofty. But a more practical award awaits the eventual buyer: a combined $24 or so a month for gas and electricity bills.
Walter and SMUD are aiming to make the house LEED Platinum. That's a Leadership in Energy and Environmental Design designation for sustainable home building reached just once in California, according to the U.S. Green Building Council in Washington, D.C.[More]