Penlan including attached cottage formerly known as Dwyfor.

Substantial house comprising two parts or builds. Built within the Georgian tradition, characteristic of the early C19 phase of improvement on the estate. Coursed rubble masonry, the principal elevation has coursed blockwork with large stones as quoins and lintels. Slate roof with deep overhanging eaves. The house to L (N) is a 2-storey, 3-window range with central doorway and 16-paned hornless sash windows with slate sills. The roof has rectangular stone gable stacks with dripstones and capping. To R (S) is a 2-storey house or wing that has a full height bow to L with french windows under a first floor 2-light casement window with moulded label. To R there is a gabled 2-window front of sash windows; unequal sashes at first floor. Across the front of the range is a slate roofed verandah on timber piers. Entrance to the RH range is through a panelled door to L of the S wall, to R is a window and there are windows set under the eaves above with moulded labels; to R an unequal sash, to L a blocked window.

The interior was not inspected at the time of the survey (June/July 2003).