The Third Street House is a vertical intermediary between the mountains and plains. Charged with designing a home for an existing foundation on a site bound by stringent building parameters the house form responds to specific constraints. The result is a unique space featuring a connective spine that both differentiates and connects living areas. From the kitchen, which acts as the “nerve-center,” and various viewpoints around the house, inhabitants enjoy specific views of the surrounding landscape through strategically placed windows. Initially designed for a young couple and their two sons, Arch11 recently completed energy upgrades and additions to the home.