The year 1833 in architecture involved some significant events.

• Carlton House Terrace in London, designed by John Nash, is completed.^[1]
• Marble Arch in London, adapted by Edward Blore from a design by John Nash, is completed on its original site.
• Vermont State House in Montpelier, Vermont, United States, designed by Ammi B. Young is completed.
• Hotel Seurahuone, Helsinki, Finland, designed by Carl Ludvig Engel, is completed.
• The Grand Theatre, Warsaw, Poland, designed by Antonio Corazzi, is opened.

• Grand Prix de Rome, architecture: Victor Baltard.

• January 1 – Robert Lawson, Scottish-born architect working in Australasia (died 1902)^[2]
• March – Frederick Pepys Cockerell, English architect (died 1878)
• May 23 – E. W. Godwin, English architect and designer (died 1886)
• July 15 – Christian Jank, Bavarian architect (died 1888)
• July 20 – Karl Hasenauer, Austrian architect (died 1894)
• July 31 – Édouard Deperthes, French architect (died 1898)

• December 18 – Jean-Charles Krafft, Austrian-born French architect (born 1764)^[3]