Cavendish Square is a publicgarden square in Marylebone in the West End of London. It has a double-helix underground commercial car park. Its northern road forms ends of four streets: of Wigmore Street that runs to Portman Square in the much larger Portman Estate to the west; of Harley Street which runs an alike distance; of Chandos Street which runs for one block and; of Cavendish Place which runs the same. The south side itself is modern: the rear façade and accesses to a flagship department store and office block. On the ground floors facing are Comptoir Libanais, Royal Bank of Scotland and Prêt à Manger premises. Oxford Circus 150 m south-east is where two main shopping streets meet. Only the south is broken by a full-width street, Holles Street which also runs one block only; the north is broken by Dean's Mews in which №s 11-13 exist, the office conversion of a nunnery, retaining a chapel in its rear. Planning permission was granted in April 2020 for a subterranean health and wellbeing development of 280,000 square feet across four storeys below ground level.
Underground is vehicle parking for 521 cars and 83 motorcycles. Operated by Q-Park, it is promoted for Oxford Street. It unusually has the form of a double helix. Vehicles are parked on either side of a continuously descending right-hand helix with one-way traffic. At the bottom, cars are directed diametrically across, to find a left-hand ascending helix, also one-way with parking on either side, sandwiched between the turns of the descending helix. It has no pedestrian lift. Parking near the beginning or end makes shortest walks. But having hoped for the latter and finding them full will result in the need for a second pass. Oxford Circus, a slightly longer journey by any southern approach along John Prince's Street, is where two main shopping streets meet.
№ 19 and 19A a pair of joined mirror-image mansion flats in Edwardian Baroque style, completed in 1909, designed by the firm of Gilbert and Costanduros with "an impressive Portland stone frontage in Edwardian Baroque style". The flats are decorative externally with stone octagonal domed roof pavilions and classical features including carved pediments, Ionic columns and pilasters and cast iron lamp standards; some ingenuity exists in variation of ceiling heights of the flats; one apartment has 1943-painted wall murals in Classical style by war artist Rupert Shephard;
№ 20
№s 1, 3 and 5 Harley Street - see Harley Street
№ 17
At Grade II*: ;east side
№ 3
№ 5 of about 1740 with next two centuries alterations
№ 7. Converted to offices. Built 1910-12 by James Gibson for Arthur Ridley Bax.
;west side
№ 18
Epstein statue and bridge
In the 19th century, №s 11, 12 and 13 on the middle of the northern range had become a convent with an interconnecting tunnel, under Dean's Mews. After damange of the London Blitzthe nuns commissioned architect Louis Osman to restore the building and create a bridge between the two. He approached Jacob Epstein for a Virgin and Child that would "levitate" above the arch and specified that it should be cast in lead which was plentiful from the bombed roofs. However, Osman did not inform the :wikt:mother superior|mother superior that the sculptor was Jewish, which may have been an objection among some Catholics at the time. However, the Arts Council congratulated her on her "innovative choice of artist" and Epstein's work was unveiled in 1953. This work is Grade II* listed.