Set within the distinguished late-19th-century red-brick terrace designed by J. Stevenson and known for its Queen Anne–Dutch gables and tall bay windows, the flat sits in a wonderfully quiet position on one of Knightsbridge’s most coveted addresses. It has been rebuilt and redesigned throughout with a confident, understatedly elegant aesthetic. Just under 1,100 sq ft, with ceiling heights rising to over 13 feet, it offers rare lateral space in a period setting, complete with two balconies over...