I read an article last night about the old In and Out Club on the north side of Piccadilly, which is due to be renovated as a hotel. I hadn’t remembered its history, athough I’ve written about it before, not surprisingly as it’s complicated. It was originally built for the second Earl of Egremont, who succeeded his uncle, the second Duke of Somerset, in February 1750, when it was known as Egremont House; it was taken over by the Marquess of Cholmondeley in the 1820s, when it was known as Cholmondeley House; then in 1829, by Prince Adolphus, Duke of Cambridge, when it became Cambridge House. It was designed by Matthew Brettingham, a building contractor, originally based in Norwich, who was employed as Clerk of Works at Holkham, and became increasingly well known as a safe pair of hands in designing both grand country houses and their London equivalents, being employed by Lord Egremont at Petworth in 1751 and asked to design his London house in 1759.
It’s very hard to photograph as currently boarded up:-

Thank you for this, Charles – I’ve always wondered about the history of this remarkable survival of a time when it was all mostly grand houses in that area.
Yes, Piccadilly was lined with grand mansions on the north side, including Burlington and Devonshire House. Charles