Thomas Hopper (1776–1856) was an English architect of the late 18th and early 19th centuries, much favoured by King George IV, and particularly notable for his work on country houses across southern England, with occasional forays further afield, into Wales and Ireland (especially Ulster).

He was involved with improvements to the Shire Hall in Monmouth under "Royal assent", where he and Edward Haycock made the building extend down Agincourt Street, creating room for a new staircase and larger courts. Hopper took up residence in Monnow Street in Monmouth whilst this was in progress.

Hopper died in 1856.

  • Penrhyn Castle, Llandegai, Bangor, North Wales (1822–1837)
  • Kentwell Hall, Suffolk (1820s)
  • Arthur’s Club, 69–70 St James’s Street, London (after 1940 the Carlton) (1826–1827)
  • Llanover House, Abergavenny, Wales (1827–1837; demolished 1935)
  • Improvements to the Shire Hall, Monmouth (1829)
  • Bryn Bras Castle, Llanrug, North Wales (1829–1835)
  • Margam Castle, South Wales (1830–1840)
  • Wivenhoe House, Essex (1846–1853)
  • Hospital buildings at St Mary's Hospital, Paddington, London (1851)
  • Alscot Park, Warwickshire
  • Amesbury Abbey, Wiltshire (1834–1840 and 1859–1860): a country house named for the nearby former abbey; Grade I listed
  • Boreham House, Essex
  • Gothic Conservatory at Carlton House, London, demolished
  • Crichel House, Dorset, alterations
  • Danbury Place, Essex
  • Easton Lodge, Essex
  • Englefield House, Berkshire
  • Gosford Castle, County Armagh
  • Chapel at Stansted Park, West Sussex
  • Glemham House, Great Glenham, Suffolk (1814)
  • Terling Place, Essex (1818–1824): alterations
  • Works at Windsor Castle
  • Gothic Ballroom at Slane Castle, County Meath, Ireland
  • Entrance lodge at Dromoland Castle, County Clare, Ireland
  • Woolverstone Hall, Suffolk: extension and remodelling
  • Rood Ashton House, Wiltshire: extension and remodelling; almost all demolished in the 1970s

<gallery>

File:Penrhyn Castle.jpg|Penrhyn Castle, south front

File:Penrhyn Castle - geograph.org.uk - 840572.jpg|Penrhyn Castle, south front

File:Penrhyn Castle 2.jpg|Penrhyn Castle, centre of west front

File:Penrhyn Castle - geograph.org.uk - 518944.jpg|Penrhyn Castle, east front

File:Leigh Court Drawing Room.jpg|The Drawing Room, Leigh Court

File:CarltonConservatory.jpg|The Conservatory exterior, Carlton House, London

File:Carlton House, Conservatory, from Ackermann's Repository of Arts, 1811 - cropped.jpg|The Conservatory interior, Carlton House, London

File:Margam Castle.jpg|Garden front, Margam Castle

File:Margam Castle1.jpg|West front, Margam Castle

File:Margam Castle2.jpg|Lantern above main staircase, Margam Castle

File:Margam Castle3.jpg|Main staircase, Margam Castle

File:Margam Castle4.jpg|Main staircase, Margam Castle

</gallery>

References