Located in Bozeman, Montana, House 2905 is a small addition for a growing family. Tasked with maximizing additional area, while minimizing cost and construction time, we decided that a simple volume delicately perched atop the existing garage was the best direction. This would eliminate the need for expensive excavation and foundation work and also allow for an elevated exterior deck space with spectacular views of the nearby Bridger and Beartooth mountain ranges. With this direction in place, the project removes the roof of the existing garage and adds a simple gable volume housing a bonus room, bedroom, and bathroom for the children that is separate from the main living spaces of the house. The new volume positions itself comfortably between adhering unobtrusively to the scale and materiality of the existing home and neighborhood, while also appearing freshly foreign in its minimal detail articulation and purity of form.