Behind a traditional facade, the house was stripped to the studs and rebuilt with a timber and steel frame and a rear extension. “We were working in a conservation district,” says McLauchlan, “and there was a lot of back-and-forth with the community before the design got off the ground. We accommodated specific concerns about light pollution by adding a one-way film to the glass stair shaft.”  Photo 16 of 21 in A Spotlight on 10 Traditional Homes with Modern Interiors from This Dramatic London Renovation Boasts a Five-Story Bookcase