The year 1931 in architecture involved some significant events.
- December 5 – The Cathedral of Christ the Saviour in Moscow (1883) is dynamited.
- The first of the Architects (Registration) Acts is passed in the United Kingdom.
- The first of the historic districts in the United States is designated in Charleston, South Carolina, by the city government.
- January 23 – Viceroy's House, New Delhi, India, designed by Sir Edwin Lutyens, first occupied.
- May 1 – The Empire State Building is completed in New York City as the tallest building in the world.
- July 1 – The rebuilt Milano Centrale railway station opens in Italy.
- July 19 – Sudbury Town station on the London Underground Piccadilly line opens as rebuilt by Charles Holden, the first of his iconic modern designs for the network.
- Villa Savoye in Paris, designed by Le Corbusier and his cousin, Pierre Jeanneret, using reinforced concrete and demonstrating Le Corbusier's Five Points of Architecture, is completed.
- Commerce Court North is completed in Toronto, Ontario and becomes the tallest building in the British Empire (1931–1962).
- George Washington Bridge the longest suspension bridge in the world by the length of central span (1931–1937), is completed.
- Royal Corinthian Yacht Club clubhouse, Burnham-on-Crouch, eastern England, designed by Joseph Emberton, is opened.
- St Olaf House (Hay's Wharf head offices), Tooley Street, London Borough of Southwark, designed by H. S. Goodhart-Rendel.
- Raleigh Bicycle Company head offices in Nottingham, England, designed by Thomas Cecil Howitt, completed.
- Aiton & Co. factory office, Derby, England, designed by Norah Aiton and Betty Scott, completed.
- India Tyres offices at Inchinnan, Scotland, designed by Thomas Wallis of Wallis, Gilbert and Partners, completed and opened.
- Atlantis House and Robinson Crusoe House in Böttcherstraße, Bremen, designed by Bernhard Hoetger, complete the street's construction in the style of Brick Expressionism.
- City Hall, Hilversum, North Holland, designed by Willem Marinus Dudok, is completed.
- India Gate in New Delhi is completed.
- Student Union at the Royal Institute of Technology, Stockholm, designed by Sven Markelius and Uno Åhrén.
- South Houses, California Institute of Technology, Pasadena, designed by Gordon Kaufmann.
- Washington Singer Building on the Streatham Campus of the University of Exeter in England, designed by Vincent Harris.
- New Synagogue, Žilina, Czechoslovakia, designed by Peter Behrens, is completed.
- High and Over, Amersham, one of the first modernist houses in England, designed by Amyas Connell, is completed.
- House for two brothers in Brno, designed by Otto Eisler, is completed.
- Apartment Building at 342, Muntaner Street, Barcelona, designed by Josep Lluís Sert, is completed.
- The Home Insurance Building in Chicago, Illinois is demolished.
- April 23 – Roland Paoletti, British architect (died 2013)
- May 3 – Aldo Rossi, Italian architect and designer (died 1997)
- May 7 – Ricardo Legorreta, Mexican architect (died 2011)
- July 17 – Edward Cullinan, English architect
- July 23 – Arata Isozaki, Japanese architect
- August 16 – Alessandro Mendini, Italian architect and designer
- October 3 – Denise Scott Brown, Rhodesian-born American architect
- March 7 – Theo van Doesburg, Dutch polymath, leader of De Stijl (born 1883)
- July 17 – William Lethaby, English Arts and Crafts architect and designer (born 1857)
- September 1 – Nahum Barnet, Melbourne-based Australian architect (born 1855)
- September 20 – Max Littmann, German architect (born 1862)
- December 3 – Frederick Walters, Scottish architect of the Victorian and Edwardian eras, notable for his Roman Catholic churches (born 1849)
- Lawrence, David (2008). Bright Underground spaces: the London Tube station architecture of Charles Holden. Harrow Weald: Capital Transport. ISBN 978-1-85414-320-4.
- "Villa Savoye à Poissy". Centre des monuments nationaux. Retrieved 2013-03-21.
- Courland, Robert (2012). Concrete Planet. Amherst, NY: Prometheus Books. p. 326.
- "Joseph Emberton, Architect". 2004. Retrieved 2015-04-04.
- Historic England. "St Olaf House (Grade II*) (1385977)". National Heritage List for England. Retrieved 12 October 2011.
- Hopkirk, Elizabeth (2018-08-22). "Nottingham bike HQ is England's 400,000th listed building". bd. Retrieved 2018-08-22.
- Walker, Lynne (1994). "The Forgotten Architecture of Vision: Aiton & Scott's Factory Office for Aiton & Co., Derby, 1930-1". Twentieth Century Architecture. Twentieth Century Society (1): 23–30. JSTOR 41859417.
- "Sky Hall". Guidebook Bremen. Retrieved 2011-08-03.