The Two-in-One House is a calm piece of architecture resting on the steep and dynamic landscape of Ekeberglia in Oslo. Its slender and rectangular form is manifested at the top of the sloping landscape. From a concrete base, the building grows with a wooden clad body forming relation with the omnipresence of broadleaf trees surrounding the building and topped with a light glass structure. The building provides inviting homes to two families, as well as an independent apartment. The main task was for the project to appear as a unify house despite its duality, and still ensure the privacy of both units.