1774 in architecture

The year 1774 in architecture involved some significant events.

• Hammond-Harwood House in Annapolis, Maryland, designed by William Buckland is begun and largely completed before the architect's death, the only surviving example of American colonial architecture based on a design by Palladio.
• Original construction of Château de Bénouville in Normandy, designed by Claude Nicolas Ledoux is completed.
• Royal Crescent in Bath, England, designed by John Wood, the Younger is completed.
• Dundas House in New Town, Edinburgh, Scotland, designed by William Chambers, is completed.
• Gatcombe Park in Gloucestershire, England is completed (much later and after reconstruction the private country home of Anne, Princess Royal).
• Clifton House, Belfast in the north of Ireland, a poorhouse designed by Mr Cooley, is opened.
• Włodawa Synagogue in Poland is completed.
• Basilica church of Santissima Annunziata Maggiore, Naples, designed by Luigi Vanvitelli and completed by his son Carlo, is consecrated.
• Ermita de Santa Ana overlooking Chiclana de la Frontera in the Spanish province of Cádiz, designed by Torcuato Cayón, is completed.
• Monastery of San Francisco, Lima, Peru, consecrated in 1673, is completed.
• Construction of Real Felipe Fortress at Callao near Lima, Peru, begun to the design of Louis Godin in 1747, is concluded.
• Vaults and choir of Vannes Cathedral in Brittany are completed.
• English Bridge over the River Severn in Shrewsbury, England, designed by John Gwynn, is completed.
• Marble Bridge at Tsarskoye Selo in Russia is erected.
• Work ceases on the Palace of Versailles in France.

Royal Crescent, Bath

• April 29 – David Hoadley, American architect (died 1839)
• November 8 – Robert Reid, Scottish royal architect (died 1856)
• Late(?) – David Laing, English architect (died 1856)
• James O'Donnell, Anglo-Irish architect working in North America (died 1830)
• 1774/5 – William Atkinson, English Gothic country house architect (died 1839)

• January 9 – Jacques-François Blondel, French architect and teacher (born 1705)
• January 28 – Antonio Galli Bibiena, Italian architect (born 1700)
• June 20 – Joshua Kirby, English landscape painter, engraver, writer, topographical draughtsman and architect (born 1716)
• October 15 – Prince Dmitry Ukhtomsky, chief architect of Moscow (born 1719)
• November/December – William Buckland, English-born architect in the American colonies (born 1734)
• Francesco Maria Preti, Italian Baroque architect (born 1701)