See also: 2004 in architecture, other events of 2005, 2006 in architecture and the architecture timeline.

Buildings

• April 6 - New facility for the Milan Trade Fair in Milan, Italy designed by Massimiliano Fuksas opens.
• April 17 - Expansion of the Walker Art Center in Minneapolis, Minnesota designed by Herzog & de Meuron opens.
• October 15 - Planned opening of the new home of the de Young Museum in San Francisco, California designed by Herzog & de Meuron.

Events

• May 17 - The renovation and restoration of Mies van der Rohe's Crown Hall at the Illinois Institute of Technology commences with the smashing of the first of the large glass walls, a privelege auctioned on eBay for over $2,500.
• June - The United States Postal Service honors twelve "Masterworks of Modern Architecture" on first class postage stamps.

Awards

• AIA Gold Medal - Santiago Calatrava
• AIA Firm Award - Murphy/Jahn
• AIA 25 Year Award - Yale Center for British Art, New Haven, Connecticut by Louis Kahn.
• Pritzker Prize - Thom Mayne, of Morphosis

Deaths

• January 6 - A. Hays Town (born 1903) - prominent American residential architect based in Baton Rouge, Louisiana.
• January 23 - Richard Feilden OBE (born 1950) - leading UK architect based in Bath.
• January 25 - Philip Johnson (born 1906) - influential American architect, first Pritzker Prize honoree.
• March 16 - Ralph Erskine (born 1914) - British architect, designer of the Byker Wall .
• March 22 - Kenzo Tange (born 1913) - leading Japanese architect, winner of the 1987 Pritzker Prize.