Winfield House

Winfield House
The garden front in 2009
Former names	St Dunstan's
General information
Architectural style	Neo-Georgian
Location	Regent's Park London, England
Coordinates	51°31′51″N 0°09′52″W / 51.5308°N 0.1644°W / 51.5308; -0.1644
Current tenants	US Ambassador to the UK and family (since 1955)
Completed	c. 1936
Client	Barbara Woolworth Hutton
Owner	United States government
Design and construction
Architect(s)	Leonard Rome Guthrie
Architecture firm	Wimperis, Simpson and Guthrie

Winfield House is an English townhouse in Regent's Park, central London and the official residence of the United States Ambassador to the United Kingdom (formally, ambassador to the Court of St. James's). The grounds are 12 acres (4.9 ha), the largest private garden in London save for that of Buckingham Palace.

The house was built for American heiress Barbara Woolworth Hutton in 1936 on the former Hertford–St. Dunstan estate that had been damaged by fire. During the Second World War, the estate was used by the Royal Air Force. Hutton donated it to the United States after the war, and since 1955 it has been the American ambassador's residence. The house is Grade II listed by Historic England as an "exceptional ambassador's residence and as a notable Neo-Georgian town house containing numerous features of note."^[1]