Good design and high-level craftsmanship are essential to a high performance house. But there's more to the story. Homes are made up of complex and interrelated systems that must be designed to work together. Applying well-researched building science principles, even to historical renovations, makes your home healthier for your family, more energy efficient, and more durable. A certified green builder make sure your beautiful home is also built smart, so that your house performs well today and tomorrow.