Above the foyer, a bridge made of glass and cold-rolled steel connects the home’s two wings. The rear one is the showcase, an expansive, but perfectly proportioned, space with large windows that bring in vistas of the yard, and the park beyond. The room’s large scale is broken up by an informal mix of materials. A glass pendant lamp by Vancouver’s Bocci hangs over a massive dining table made from a live-edge walnut slab that the couple picked out themselves at a lumberyard in Cambridge.photos by Bob Gundu