Base Street Trio is a three-apartment row house situated in Tammisalo neighborhood of eastern Helsinki, Finland. Gable roofs, use of solid wood CLT (Cross Laminated Timber) as the frame material and cladding facades with larch was to make natural homes that values area’s rich tradition in wood building (see Finnish Tyyppitalo). CLT was used in addition of exterior walls on floor slabs, balcony and entry canopies. Bare frame elements are visible inside, since there was no need for extra insulation. All the openings were pre-cut at the CLT element factory which allowed easy and fast construction on site.