The year 2000 in architecture involved some significant architectural events and new buildings.

• June 22 – The Architect company Snøhetta wins the international Architect competition for Oslo's New National Opera House.^[1]
• Holy Trinity Column in Olomouc is inscribed on the UNESCO World Heritage List.
• Greenwich Millennium Village in London designed by Ralph Erskine.

• February 19 – Rose Center for Earth and Space in New York City, USA, designed by Polshek Partnership Architects.
• March 8 – Peckham Library in London, UK, designed by Alsop and Störmer. It wins this year's Stirling Prize.
• May 12 – Tate Modern in London, a conversion of Bankside Power Station by Herzog & de Meuron.
• October 12 – The Lowry theatre and gallery centre in Salford, England, designed by Michael Wilford and Buro Happold.
• August – Centro Brasileiro Britânico in São Paulo, designed by Marc Rabin.
• August 19 – Cathedral of Christ the Saviour in Moscow, Russia, reconstructed to Konstantin Thon's 1832 design, is dedicated.
• October 25 – Judenplatz Holocaust Memorial unveiled in Vienna, designed by Rachel Whiteread.
• November 13 – Museu de les Ciències Príncipe Felipe in Valencia, Spain, with façade designed by Santiago Calatrava.
• December 6 – Queen Elizabeth II Great Court in the British Museum, London, UK.^[2]
• date unknown
  • Emirates Towers in Dubai, United Arab Emirates.
  • Sony Center, Potsdamer Platz in Berlin, Germany, designed by Helmut Jahn.
  • Diamond Ranch High School in Pomona, California, USA, designed by Thom Mayne of Morphosis.
  • Museum of Pop Culture in Seattle, USA, designed by Frank Gehry.
  • Sibelius Hall in Lahti, Finland, designed by Kimmo Lintula and Hannu Tikka.

• May 14 – Al Faisaliyah Center in Riyadh, Saudi Arabia, designed by Foster and Partners, the first building to be completed in a competition between two Saudi princes; the Kingdom Centre is completed in 2002.
• Bankers Hall West in Calgary, Alberta, designed by Cohos Evamy.
• Montevetro (apartments), Battersea Reach, London, designed by Richard Rogers Partnership.

• AIA Gold Medal – Ricardo Legorreta
• Architecture Firm Award – Gensler
• Emporis Skyscraper Award – Sofitel New York Hotel
• Grand Prix de l'urbanisme – Alexandre Chemetoff
• Praemium Imperiale Architecture Laureate – Richard Rogers
• Pritzker Prize – Rem Koolhaas
• Prix de l'Équerre d'Argent – Philippe Gazeau
• RAIA Gold Medal – John Morphett
• RIBA Royal Gold Medal – Frank Gehry
• Stirling Prize – Alsop & Störmer for Peckham Library, London^[3]
• Thomas Jefferson Medal in Architecture – Daniel Patrick Moynihan
• Twenty-five Year Award – The Smith House
• Vincent Scully Prize – Jane Jacobs

• January 18 – Margarete Schütte-Lihotzky, Austrian architect in the Nazi Resistance movement (born 1897)^[4]
• February 19 – Friedensreich Hundertwasser, Austrian artist and architect (born 1928)
• July 3 – Enric Miralles, Spanish architect (born 1955)
• July 29 – Eladio Dieste, Uruguayan engineer and architect (born 1917)

• Timeline of architecture