20 pics. Fenton House is not spectacular but it is very charming with a large collection of porcelain (including Meissen) together with several musical instruments and paintings. Its website is here (it isn’t open every day and there is a charge but there are occasional concerts) and some of its history here.
The above view of the gardens is from the third floor balcony and in the distance can be seen The Admirals House (where the origins of Mary Poppins was written) which has its own history here.
One can photograph everywhere except the harpsichord in the dining room (it belongs to the Queen) and the large framed pictures on the third floor.
Unfortunately there is no café but there several places for refreshment near the corner of Mount Square and Heath Street and along New End there is The Duke of Hamilton and The Buttery of Burgh House (they are all on Google Maps).
Not far away, just to the north of Hampstead Heath, is Kenwood House which is free to enter.