Nº 21 Portman Square


N° 21 as it is now known, was originally numbered N° 18 and was changed to N° 21 in 1859.

Originally purchased at Michaelmas 1772 by William Lock who commissioned the building and occupied it from 1778, having taken 6 years to complete under the eye of architect James Wyatt. Lock’s residence at N° 21 came to an unfortunate end in 1780 due to financial difficulties experienced as a result of a £20,000 unpaid loan to a Mr Crockett, a London merchant who consequently committed suicide.

Succeeding occupants ranged from Lord Maynard, followed by Colonel George Clerk, to Hamilton Nisbet and family from 1788 and then Spencer Percival from 1856.

George Hanbury and family became tenants from 1864 for the rest of the 19th century, making structural changes to the building that remain today; most notably the moving of the entrance from Portman Square onto Gloucester Place and the addition of a balustrade on the first floor.


N° 21 ceased being a private house in 1929, after which the following establishments occupied the building:

  • 1930-1952 Dutch Legation
  • 1953-1958 Rotary International of Great Britain HQ
  • 1964-1970 Senegalese Embassy
  • 1970-2005 Royal Institute of British Architects drawings collection archive

Home House was acquired in 2004 by a small group of private investors, Quintillion UK Limited who later purchased N° 21 Portman Square. The vision was to fuse of the old with the new; merging the grandeur and glamour of the existing buildings at 19 and 20, with the modernity and excitement of the newly-refurbished 21. Cutting edge design from Zaha Hadid and polished finishing and detail from Candy and Candy completed the refurbishment in early 2010. The result is an exciting and exclusive Club, rooted in the 18th Century and alive and vibrant in the 21st.