Treehouse is a 72-unit co-living house in the heart of Kangnam, the start-up hub of Seoul. Composed of micro-studios, it is designed for young professionals and their animal companions. The central atrium houses green landscapes and work areas, communal kitchen, laundry and pet baths. The six residential floors above each showcase different units - whether lofted sleeping quarters over an open soaking tub; a ladder of ledges to provide perches for feline residents; or a spacious penthouse for couples. A key unit detail is the slanted windows with blinds rising bottom-up for a view of the sky.