Carreg Llwyd is number twenty in 'The Close' which was laid out and developed between 1899 and 1945. It was instigated by H L North, who was an outstanding Arts and Crafts architect of his age in Wales. The almost unaltered buildings (in materials making reference to local vernacular building styles), and the lay-out of The Close, form a textbook example of a group of high quality Arts and Crafts style domestic architecture unique in Wales. Carreg Llwyd was actually built by the architect, P M Padmore (b 1896) who was the partner of H L North, after the death of the latter in 1941.

It is a two-storey house with a rough-cast render, which is now painted white. It has a roof laid in graded courses of small grey slates and the chimneys are in red-brown brick with inclined slate covers. The front elevation runs up into a central gable with a group of three windows, below which is the ground floor window. On the left, there is a bay with a hipped slate roof which was formerly the garage and to the right, the roof sweeps down over the porch, which is now glazed. The gable end to the right has a first floor group of three windows above the bay window with a slate roof, which was an addition by P M Padmore.

Source:- Cadw listed buildings, NJR 30/04/2008