Wentworth Woodhouse is a large country house in South Yorkshire, England.
In 2016, Mansions Global describe it as:
the largest private house in the UK
In 2014, Yorkshire Life described it as
the largest privately-owned house in Europe
Visiting Wentworth Woodhouse: The Grand Home of the Earls Fitzwilliam in Yorkshire, dated October 17, 2021 says:
Wentworth Woodhouse is one of the finest Georgian buildings in the United Kingdom and it has the longest façade of any country home in Europe;..
and
Wentworth Woodhouse was the largest private home in England until it was sold in 2017 to the Wentworth Woodhouse Preservation Trust who have been breathing new life into the old house and giving it a new future.
Some of the other very large houses and former houses in the UK include:
- Blenheim Palace, still the residence of the Duke of Marlboro.
- Stowe House, which has been a school since 1923.
- Knole Owned by the National Trust, but descendants of the owners still live in part of it.
- Castle Howard, still a private home.
- Knowsley Hall, which was half demolished in the 1950s. Still owned, but not lived in, by descendants of its owners.
- Prior Park, Bath, now a school.
- Ashridge, now a business school.
- Hamillton Palace, former home of the Dukes of Hamilton, demolished 1921–1926.
- Eaton Hall, home of the Dukes of Westminster, mostly demolished in 1961. https://en.wikipedia.org/wiki/Eaton_Hall,_Cheshire
- Eastbury Park, demolished 1782.
- Audley End House, mostly demolished in the 18th century.
And there might be other candidates I haven't listed.
Is/was Wentworth Woodhouse the largest current or former private single family house in the UK?