The year 2011 in architecture involved some significant architectural events and new buildings.

• February 6 – Cambodian officials claim that "a wing" of the Preah Vihear Temple (11th century) has collapsed due to an alleged Thai bombardment in the Cambodian–Thai border dispute.^[1]
• May – Broadcaster BBC North begins its move into Bridge House, Dock House and Quay House, designed by Wilkinson Eyre, at MediaCityUK, Salford Quays, England.^[2]
• June 15 – St Paul's Cathedral in London completes its 15-year £40 million restoration project of cleaning and repair, among the largest such projects ever undertaken in the United Kingdom.^[3]
• November – The fourth World Architecture Festival is held in Barcelona.
• November 3–11 – Typhoon Haiyan causes widespread destruction in Southeast Asia. Among buildings seriously damaged is Guiuan Church in the Philippines.

• January 11 – Salvador Dali Museum, St. Petersburg, Florida, United States, designed by HOK.
• January 21 – Museum of Old and New Art, on the Berriedale peninsula in Hobart, Tasmania, Australia, designed by Nonda Katsalidis.
• January 25 – New World Center, home of the New World Symphony Orchestra, at Miami Beach, Florida, designed by Frank Gehry.^[4]
• February 10 — The Granoff Center for the Creative Arts at Brown University, designed by Diller Scofidio + Renfro^[5]
• February 28 – Museo Soumaya in Mexico City, designed by Fernando Romero.^{[6][7][8][9][10][11]}
• March 1 – Media City Footbridge across the Manchester Ship Canal at MediaCityUK, Salford Quays, England, designed by Gifford and Wilkinson Eyre Architects.
• April 16 – Turner Contemporary art gallery, in Margate, Kent, England, designed by David Chipperfield.^[12]
• May 1 – New Lyric Theatre, Belfast, designed by O'Donnell & Tuomey of Dublin.^[13]
• May 21 – The Hepworth Wakefield art gallery, West Yorkshire, England, designed by David Chipperfield.^[12]
• May 31 – Ponte della Musica-Armando Trovajoli across the Tiber in Rome, Italy, designed by BuroHappold Engineering and Powell-Williams Architects.
• June – Windmill Hill archive centre, Waddesdon, England, designed by Stephen Marshall.^[14]
• June 16 – Gothenburg Mosque, Sweden.
• June 20 – Riverside Museum, the new development of the Glasgow Museum of Transport in Scotland, designed by Zaha Hadid Architects.
• June 25 – Peace Bridge across the River Foyle in Derry, Northern Ireland, designed by Wilkinson Eyre Architects.
• July 19 – New Museum of Liverpool, at Liverpool Pier Head, England, designed by architects 3XN and engineers Buro Happold.^[15]
• August 27 – Rustavi Sioni, church in Rustavi, Georgia, designed by Besarion Menabde, Nikoloz Abashidze and Nikolos Dadiani (consecration date).
• September – firstsite new art gallery, Colchester, England, designed by Rafael Viñoly.^[12]
• September 11 – National September 11 Memorial, Reflecting Absence, on the World Trade Center site in New York City, USA, designed by architect Michael Arad with landscape architect Peter Walker (dedication date).
• September 13 – Westfield Stratford City shopping mall, Stratford, London.
• October 12 – Royal Opera House Muscat opens in Muscat, Oman.
• October 20 — The Human Ecology Building at Cornell University is dedicated. Designed by Gruzen-Samton Architects (IBI Group).^[16]
• December 21 – Capital Gate skyscraper hotel and office building, in Abu Dhabi.

• January
  • City of Westminster College, Paddington Green Campus, London, designed by schmidt hammer lassen architects.
  • Heron Tower in the City of London, designed by Kohn Pedersen Fox.
• February
  • 8 Spruce Street, a skyscraper in New York City, USA, designed by Frank Gehry.^[17]
  • Sunset Chapel, Acapulco, Guerrero, Mexico, designed by BNKR Arquitectura.^[18]
• March 29 – London Olympic Stadium, designed by Populous.
• April – Metropol Parasol in Seville, Spain, designed by Jürgen Mayer.
• July 6 – Trump Ocean Club International Hotel and Tower, the tallest building in Panama and Latin America.
• July 27 – London Aquatics Centre, designed by Zaha Hadid.
• September
  • CMA CGM Tower in Marseille, designed by Zaha Hadid.
  • Aberdeen University New Library in Scotland, designed by Schmidt Hammer Lassen architects.
• October 20 — Milstein Hall at Cornell University, designed by Rem Koolhaas^[19]
• October 28 – ArcelorMittal Orbit, designed by Anish Kapoor with Cecil Balmond, erected at Olympic Park, London.
• November
  • Canada Water Library in London Docklands, designed by Piers Gough of CZWG.^[20]
  • Robert H. Jackson United States Courthouse in Buffalo, New York, designed by Kohn Pedersen Fox.
• dates unknown
  • N M Rothschild & Sons' New Court banking headquarters in the City of London, designed by Rem Koolhaas's OMA, completed.^[21]
  • Brockholes Visitor Centre, a floating wooden nature reserve centre designed by Adam Khan of Arca, opens near Preston, Lancashire, England.^[22]
  • Eighth Avenue Place East in Calgary, Alberta
  • Maggie's Centres, drop-in cancer care centres in Great Britain^[13]
    • Maggie's Gartnavel, Glasgow, designed by Rem Koolhaas's OMA.
    • Maggie's Nottingham, designed by Piers Gough and Paul Smith.
    • Maggie's South West Wales, Swansea, designed by Kisho Kurokawa (opens December 9).
  • Temporary Serpentine Pavilion in London, designed by Peter Zumthor.^[23]
  • Folly for a Flyover, a 'pop-up' temporary arts centre in East London, England, designed by Assemble.^[13]
  • New Hospital Pavilion, University of Chicago Medical Center, designed by Rafael Viñoly, projected for completion.
  • University of Arizona Science Center, Tucson, designed by Rafael Viñoly, projected for completion.
  • The Crystal, Copenhagen, Denmark (part of Nykredit headquarters), designed by Schmidt Hammer Lassen Architects.
  • Kravis Center, Claremont McKenna College, Claremont, California, designed by Rafael Viñoly, projected for completion.

• AIA Gold Medal – Fumihiko Maki
• Architecture Firm Award – BNIM Architects
• Carbuncle Cup – MediaCityUK
• Driehaus Architecture Prize for New Classical Architecture – Robert A. M. Stern
• Emporis Skyscraper Award – 8 Spruce Street New York City designed by Frank Gehry
• European Union Prize for Contemporary Architecture (Mies van der Rohe Prize) – David Chipperfield
• Grand Prix de l'urbanisme – Michel Desvigne
• Lawrence Israel Prize – David Rockwell
• LEAF Award, Overall Winner – OBR Open Building Research
• Praemium Imperiale Architecture Award – Ricardo Legorreta
• Pritzker Architecture Prize – Eduardo Souto de Moura
• RAIA Gold Medal – Graeme Gunn
• RIBA Royal Gold Medal – David Chipperfield
• Stirling Prize – Zaha Hadid for Evelyn Grace Academy^[24]
• Thomas Jefferson Medal in Architecture – Maya Lin
• International Union of Architects UIA Gold Medal – Álvaro Siza Vieira
• AIA Twenty-five Year Award – John Hancock Tower designed by Pei Cobb Freed & Partners
• UIA Gold Medal – Álvaro Siza Vieira
• Vincent Scully Prize – William K. Reilly

• June 6
  • Stefan Kuryłowicz, Polish architect (born 1949)
  • Amnon Niv, Israeli architect and urban designer (born 1930)
• September 17 – Colin Madigan, Australian architect (born 1921)
• September 27 – Imre Makovecz, Hungarian architect (born 1935)
• October 2 – Efraín Recinos, Guatemalan architect (born 1928)
• October 5 – Enver Faja, Albanian architect (born 1934)
• October 24 – Bruno Weber, Swiss architect (born 1931)
• November 25 – Karel Hubacek, Czech architect (born 1924)
• December 12 – Gene Summers, American architect (born 1928)
• December 26 – Kiyonori Kikutake, Japanese architect, co-founder of the Metabolist group.^[25] (born 1928)
• December 27 – Anne Tyng, American architect (born 1920)
• December 30 – Ricardo Legorreta, Mexican architect, UIA Gold Medalist (born 1931)

• Timeline of architecture