It was designed in the 1810s chiefly by architect William Fuller Pocock, and the mid-rise, basemented houses fronting its two long sides, with slate mansard roofs are listed in the British protective and recognising scheme, and were built in the 1820s.
[1] It is in the west of Knightbridge, north of Brompton Road, in Anglican terms it is in South Kensington but historically the parish near-equated to the detached part of St Margaret's Westminster, which explains the present borough.
[1] By 1911, the minor, overarching legal interest (reversion) of the square's garden and any buildings enjoyed on long leases (by others) belonged to J. C.
[1] The square is open, at its north end, into a broad backstreet, Trevor Street, of similar house design and date, at an alike length as the square ending at a broad road then Hyde Park Barracks, London, which are set against Hyde Park.
[9] Group Captain Harry Day, GC, DSO, OBE, (3 August 1898 – 11 March 1977), RAF officer and serial escaper from German POW camps in the Second World War, lived for much of his life at 8 Trevor Square.