The Wells Tavern / NW3
Circa 1849 Georgian-style public house of three storeys plus basement on corner plot. Venetian windows on ground floor aside matching round-arched doorway with fan-light. Grade II listed. The late Ian Nairn described Hampstead's pubs as "like a private society whose performance is not worth the entrance fee", but I understand this one was rescued from the dread developers of luxury flats so it's a result! London Borough of Camden.
(CC BY-NC-SA 2.0 - attribute: Photo by George Rex, non-commercial, share-alike.)