LS is a 5,000 square foot waterfront residence located on Mercer Island. The layout of the original 1952 residence was completely transformed to reflect the active lifestyle of the owners and to take advantage of the phenomenal views over Lake Washington. The existing foundation was preserved to minimize disturbance to the site, and the added footprint steps with the slope of the site. LS is the first residence using CLT construction on the island. The exposed cross laminated timber ceilings are one of the featured elements that provide a warm contrast with the concrete floors and steel beams throughout.