Tree Haus is a site driven, highly responsive design and build project. Environmentally speaking, the home, sited in the extreme snowy microclimate of Summit Park near Park City, is designed to Passive House standards with a highly-efficient thermal envelope and energy systems. Socially, the spaces are arranged so that the primary public living areas are vertically sandwiched between two levels of private spaces, utilizing the stepped rhythm of the form as deck and patio space to create an open indoor-outdoor experience. This house is a tribute to our rational approach to design and building in a more deliberate, modern form.