Located on the corner of Portland Place and Weymouth Street, it serves as the headquarters of the Royal Institute of British Architects ("RIBA").

Construction began in 1932, with the foundation stone laid on 28 June 1933 by Thomas, Lord Howard de Walden, a noted patron of the arts.

[1] On 14 September 1970, thirty-seven years after its construction, the building was listed grade II* (the second highest category in England and Wales).

In 2024, the RIBA announced a £85 million refurbishment by Benedetti Architects, with the building due to close from 1 June 2025 for two and a half years.

Externally, the Art Deco elements manifest themselves in the bronze doors, architectural motifs, and trans-storey main window.