For their first commercial venture, TYIN Tegnestue Architects created a contemporary addition to a 1950s home in Trondheim, Norway. The new space includes a ground floor living room, a basement bathroom, and a mezzanine where the family’s children can play. On the inside, the extension is lined in Norwegian birch plywood and dotted with exposed bolts. From the outside, it is clad in naturally finished pine except for the angular orange doorway. The bold design can be seen jutting forward into the yard and has inspired a mix of praise and eye rolling from the neighbors.