"The project, zHome, is a newly completed cluster of 10 town homes arranged around a central courtyard atop a plateau called the Issaquah Highlands. Beyond its energy self-sufficiency through solar power, said Brad Liljequist, the project manager with the city of Issaquah, the development should cut water use by 70 percent, yielding an estimated annual utility savings of $3,500 to $4,000 per homeowner when solar power incentives are included." (Quoted from article)