Puck's Hut was designed by the Scottish architect Sir Robert Lorimer, and was built by Mr H.G. Younger to commemorate the achievements of James Duncan on the estate and dedicated to Sir Isaac Bayley Balfour who, as Regius Keeper of RBGE from 1890 to 1922, saw RBGE's worldwide reputation soar. It was Bayley Balfour who first put forward the idea of having a west coast garden.
It was originally situated in Puck's Glen, overlooking a wooded ravine on the east side of the Eachaig valley, but now stands at the head of the Formal Garden. It is tiled with western red cedar and panelled with a variety of timbers grown on the estate.