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Portman Square
	The square in 1813
	Portman Square (City of Westminster)
Type	Garden square
Length	530 ft (160 m)
Width	400 feet (120 m)
Area	Marylebone
Location	London
Postal code	W1
Construction
Construction start	1765
Completion	1784; (240 years ago)
Other
Status	west end of the north side:; large building:; Grade I listed

Portman Square is a garden square in Marylebone, central London, surrounded by townhouses. It was specifically for private housing let on long leases having a ground rent by the Portman Estate, which owns the private communal gardens. It marks the western end of Wigmore Street, which connects it to Cavendish Square to the east.

History

It was built between 1765 and 1784 on land belonging to Henry William Portman.

An infantry barracks, Portman Square Barracks, was built between Portman and Orchard Streets; it was demolished in about 1860.^[1]

At the east end of the garden, thus marking one end of Baker Street and of Orchard Street (a short link to Oxford Street) is the Hamilton Memorial Drinking fountain. This was provided by Mariana Augusta, under the auspices of the Metropolitan Drinking Fountain and Cattle Trough Association, in honour of her late husband Sir John James Hamilton, 2nd Baronet, briefly MP for Sudbury. The fountain is statutorily protected and recognised in the mainstream, initial category (Grade II).^[2]

About a third of the north side is in the statutory category scheme, described above but in the rarest, highest category, Grade I.^[3]

No.s 11–15 built in 1773–1776 by architect James Wyatt in cooperation with his brother Samuel Wyatt. First houses in which Coade stone was used. Demolished in the 20th century.^[4]
No. 20 – Home House, built by Robert Adam between 1773 and 1777 for Elizabeth, Countess of Home, and later used by the Courtauld Institute.^[3]
No. 22 – Montagu House, built in the northwest corner of the square by James Stuart between 1777 and 1781 for Elizabeth Montagu, demolished in the Blitz by an incendiary bomb.
No. 30 – Churchill Hotel, incorporating the Michelin-starred Locanda Locatelli restaurant. This was bought on a long lease as home of George Keppel, grandson of George Keppel, 6th Earl of Albemarle (noted above), and the husband of Alice Keppel, the mistress of King Edward VII.

Map of much of part of Mayfair (south) and Marylebone (north) c. 1830 the square is top left
Side-view of the south side in 2008, displaying odd traffic system replaced c. 2013
The Dining Room of No. 20 in 1913