CHANCERIESTHE DIPLOMATIC ATLAS

Embassy of the United Kingdom of Great Britain and Northern Ireland

Diplomatic history and full roster

Embassy of the United Kingdom of Great Britain and Northern Ireland

3100 Massachusetts Avenue NW, Washington, DC

Eric Bedford’s office block wraps around an open court, with a circular conference pavilion beside the street.

FactValueBasis and sources
Constructed1960verified Design approved in 1955 and foundation stone laid in 1957. Bertram dates construction to 1958–1960 and the opening to 23 September 1960.
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Acquired by the United Kingdom1941–1953 (site)verified; Historic component plots acquired in 1941, 1951 and 1953; present lot 0064 is a later parcel consolidation.
  1. gloverparkhistory.com
  2. roomfordiplomacy.com
NeighborhoodObservatory Circleverified
  1. maps2.dcgis.dc.gov
ArchitectEric Bedfordverified
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Rooms150–260 est.estimated; Editorial range for the 138,980 sq ft office building: allow 55–65% enclosed usable room area and 350–500 sq ft per office/meeting/service room, rounded outward. The historical 550-person brief and subsequent open-office alterations make the range low confidence; workstations are not rooms. Estimated room total; a complete room inventory is unavailable.
  1. gloverparkhistory.com
  2. maps2.dcgis.dc.gov
  3. roomfordiplomacy.com
  4. roomfordiplomacy.com
Floor area139,000 sq ftverified; LIVING_GBA, lot 2147/0064, building 1. Gross inventory area includes the registered chancery building complex; it is distinct from the smaller 2018 refurbishment scope.
  1. maps2.dcgis.dc.gov
Site area77,900 sq ftverified; Parcel total: 2147/0064. DC ITSPE LANDAREA, recorded square feet. Roads and unrelated neighboring parcels excluded.
  1. maps2.dcgis.dc.gov
2026 Value$55.1Mverified; Parcel total: 2147/0064. Active 2026 DC ITSPE ASSESSMENT; land plus improvements. Not proposed value, tax owed, sale price or leasehold value.
  1. maps2.dcgis.dc.gov

Complete property record

British Ambassador’s Residence

3100 Massachusetts Avenue NW, Washington, DC

Lutyens’ red-brick residence faces formal gardens behind its columned portico.

FactValueBasis and sources
Constructed1930verified Work had begun by 20 February 1928; historical sources place residence completion in 1930, and Blakely’s archival chronology explicitly places initial occupation after Lutyens’s May 1930 visit. No exact move-in day is asserted. The FCDO 2023 statement gives construction as 1928, without separating completion and occupancy.
  1. gloverparkhistory.com
  2. hansard.parliament.uk
  3. washingtonembassygardens.wordpress.com
Acquired by the United Kingdom1925 (site)verified; May 1925 exchange agreement for original lot 40. Adjacent garden lots 38/39 were acquired in November 1930.
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NeighborhoodObservatory Circleverified
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ArchitectSir Edwin Lutyensverified Frederick H. Brooke was local supervising architect.
  1. roomfordiplomacy.com
  2. www.gov.uk
Rooms40–70 est.estimated; Editorial program estimate for the multi-storey Lutyens residence: 8–12 reception/library/dining rooms, 15–25 family/guest rooms, and 17–33 kitchen, service and staff rooms. Excludes the Old Chancery and courtyard wings, circulation and bathrooms. Room allocations are assumed; a measured inventory is unavailable. Estimated room total; a complete room inventory is unavailable.
  1. gloverparkhistory.com
  2. hansard.parliament.uk
  3. maps2.dcgis.dc.gov
  4. roomfordiplomacy.com
Floor area117,100 sq ftverified; Residence-estate building area, including the Old Chancery: 76,894 + 40,219 sq ft from distinct CAMA buildings 1 and 2 on SSL 2147/0040. The row's land and valuation already cover this same residence/Old Chancery estate (lots 0040,0038,0039). Do not describe 117,113 sq ft as the Lutyens residence building alone.
  1. maps2.dcgis.dc.gov
Estate area220,191 sq ftverified; Historic residence and Old Chancery estate: lots 0040, 0038 and 0039, including gardens. The area covers the residence estate and its grounds.
  1. maps2.dcgis.dc.gov
  2. roomfordiplomacy.com
2026 Value$59.7Mverified; Sum of nonoverlapping estate parcels: 2147/0040, 2147/0038, 2147/0039. Active 2026 DC ITSPE ASSESSMENT; land plus improvements. Not proposed value, tax owed, sale price or leasehold value.
  1. maps2.dcgis.dc.gov
Site area220,200 sq ftverified; Sum of nonoverlapping estate parcels: 2147/0040, 2147/0038, 2147/0039. DC ITSPE LANDAREA, recorded square feet. Roads and unrelated neighboring parcels excluded.
  1. maps2.dcgis.dc.gov

Complete property record

Historic Moments

An envoy meets George III

1785-06-01

John Adams presents his credentials to George III as the first American minister to Great Britain. Diplomatic representation follows the war that separated the two countries.

Peace is signed at Ghent

1814-12-24

British and American negotiators sign a treaty ending the War of 1812. Captured territory is to be returned, while boundary commissions take up disputes that the fighting has left unresolved.

A boundary dispute tests relations

1895-12-17

Grover Cleveland challenges Britain over its boundary dispute with Venezuela. Threats give way to arbitration, easing a confrontation between Britain and the United States while leaving Venezuela with little of the territory it claims.

The Atlantic charter

1941-08-14

Roosevelt and Churchill set out shared principles for the postwar world after meeting off Newfoundland, defining an influential vision of international cooperation.

Washington opposes the Suez invasion

1956-10-31

Dwight Eisenhower publicly opposes the British, French, and Israeli attack on Egypt. American pressure helps force a ceasefire, bringing a severe rupture within the Western alliance.

A breakthrough for peace

1998-04-10

The Belfast Agreement emerges from talks chaired by American senator George Mitchell. British, Irish, and Northern Irish leaders establish a framework for peace after decades of conflict.

Chiefs of Mission

DiplomatOfficeRecorded serviceStatus
James RoscoeChargé d’affaires2025–2026Former
Peter MandelsonAmbassador2025Former
James RoscoeChargé d’affaires2025Former
Dame Karen PierceAmbassador2020–2025Former
Michael TathamChargé d’affaires2019–2020Former
Sir Kim DarrochAmbassador2016–2019Former
Sir Peter WestmacottAmbassador2012–2016Former
Sir Philip BartonChargé d’affaires2012Former
Sir Nigel SheinwaldAmbassador2007–2012Former
Sir David ManningAmbassador2003–2007Former
Sir Christopher MeyerAmbassador1997–2003Former
Sir John KerrAmbassador1995–1997Former
Sir Robin RenwickAmbassador1991–1995Former
Sir Antony AclandAmbassador1986–1991Former
Sir Oliver WrightAmbassador1982–1986Former
Sir Nicholas HendersonAmbassador1979–1982Former
Peter JayAmbassador1977–1979Former
Sir Peter RamsbothamAmbassador1974–1977Former
The Earl of CromerAmbassador1971–1974Former
John FreemanAmbassador1969–1971Former
Sir Patrick DeanAmbassador1965–1969Former
David Ormsby-GoreAmbassador1961–1965Former
Sir Harold CacciaAmbassador1956–1961Former
Sir Roger MakinsAmbassador1953–1956Former
Sir Oliver FranksAmbassador1948–1952Former
Lord InverchapelAmbassador1946–1948Former
Lord HalifaxAmbassador1941–1946Former
Nevile Montagu ButlerChargé d’affaires1940–1941Former
The Marquess of LothianAmbassador1939–1940Former
Ronald Ian CampbellChargé d’affaires1930Former
Sir Ronald LindsayAmbassador1930–1939Former
Henry Getty ChiltonChargé d’affaires1924Former
Sir Esmé HowardAmbassador1924–1930Former
Henry Getty ChiltonChargé d’affaires1923Former
Sir Auckland GeddesAmbassador1920–1924Former
Ronald LindsayChargé d’affaires1919Former
Colville BarclayChargé d’affaires1919Former
Viscount GreyAmbassador1919–1920Former
Colville BarclayChargé d’affaires1918Former
The Earl of ReadingAmbassador1918–1919Former
Sir Cecil Spring RiceAmbassador1913–1918Former
Esmé HowardChargé d’affaires1907Former
James BryceAmbassador1907–1913Former
Arthur Stewart RaikesChargé d’affaires1903Former
Sir Mortimer DurandAmbassador1903–1907Former
Arthur Stewart RaikesChargé d’affaires1902Former
Sir Michael HerbertAmbassador1902–1903Former
Sir Julian PauncefoteAmbassador1893–1902Former
Sir Julian PauncefoteMinister1889–1893Former
Michael HerbertChargé d’affaires1888–1889Former
Sir Lionel Sackville-WestMinister1881–1888Former
Francis Clare FordChargé d’affaires1867–1868Former
Sir Edward ThorntonMinister1867–1881Former
Sir Frederick BruceMinister1865–1867Former
Joseph Hume BurnleyChargé d’affaires1864–1865Former
William StuartChargé d’affaires1862Former
Lord LyonsMinister1858–1865Former
Lord NapierMinister1857–1859Former
John Savile-LumleyChargé d’affaires1855Former
John Fiennes Twisleton CramptonMinister1852–1856Former
John Fiennes Twisleton CramptonChargé d’affaires1850–1852Former
Henry BulwerMinister1849–1852Former
John Fiennes Twisleton CramptonChargé d’affaires1847–1849Former
Richard PakenhamMinister1844–1849Former
Henry Stephen FoxMinister1836–1844Former
Charles BankheadChargé d’affaires1835–1836Former
Charles BankheadChargé d’affaires1831Former
Charles VaughanMinister1825–1835Former
Henry Unwin AddingtonChargé d’affaires1823–1825Former
Stratford CanningMinister1820–1825Former
Anthony St. John BakerChargé d’affaires1815–1816Former
Charles BagotMinister1815–1820Former
Augustus FosterMinister1811–1812Former
John Philip MorierChargé d’affaires1810–1811Former
Francis James JacksonMinister1809–1810Former
David ErskineMinister1806–1809Former
Anthony MerryMinister1803–1806Former
Edward ThorntonChargé d’affaires1800–1803Former
Robert ListonMinister1796–1800Former
Phineas BondChargé d’affaires1795–1796Former
George HammondMinister1791–1795Former
Sir Christian Turner KCMGAmbassador2026–PresentCurrent