Brook Street is an axial street in the exclusive central London district of Mayfair. Most of it is leasehold, paying ground rent to and seeking lease renewals from the reversioner, that since before 1800, has been the Grosvenor Estate. Named after the Tyburn that it crossed, it was developed in the first half of the 18th century and runs from Hanover Square to Grosvenor Square. The western continuation is called Upper Brook Street; its west end faces Brook Street Gate of Hyde Park. Both sections consisted of neo-classical terraced houses, mostly built to individual designs. Some of them were very ornate, finely stuccoed and tall-ceilinged, designed by well known architects for wealthy tenants, especially near Grosvenor Square, others exposed good quality brickwork or bore fewer expensive window openings and embellishments. Some of both types survive. Others have been replaced by buildings from later periods.

Hanover Square is a green square in Mayfair, Westminster, south west of Oxford Circus where Oxford Street meets Regent Street. Six streets converge on the square which include Harewood Place with links to Oxford Street, Princes Street, Hanover Street, Saint George Street, Brook Street and Tenderden Street, linking to Bond Street and Oxford Street.