Dduallt (also known as Plas y Dduallt)

This is a farmhouse, dating from the 17th century, built according to the 'unit system', a design where linked dwellings are arranged around a courtyard. The farmhouse consists of two ranges connected by a small, covered porch. A barn or byre is situated behind the rear range, with a kitchen addition projecting from one gable. Modern, single-storey additions are located at the far end of the barn.

The main range, facing the front, is constructed of rubble masonry with a slate roof. It features tall, square stone gable stacks with dripstones and capping. There are three-light windows on the ground and first floors, the ground floor window originally a doorway accessed by an external stone stairway. The present entrance door is located far to the left, a narrow door with a rounded head. On the right-hand gable return, windows are arranged at ground, first, and attic levels, set into deeply recessed housings. Modern timber mullioned and casement windows are present, though the attic windows retain earlier diagonally-set timber mullions. The left-hand gable return has scattered small windows, with first-floor windows flanking the fireplace and featuring simple, flat labels over the window heads.

The porch has a segmentally headed doorway with radiating stones, and a small window above, recessed within an opening between the two ranges. A later addition is a carved depiction of a lion's head above the doorway.

The rear range is a two-storey block of mortared rubble masonry with a slate roof, tall gable stacks with dripstones, and a particularly large stack on the left. The front lateral wall, facing the main house, has a single ground-floor and first-floor window near the porch. The ground-floor window is a three-light timber casement and the first-floor window is a two-light casement within a gabled half-dormer that breaks the eaves. A small window is located at ground floor level in the right-hand gable return, and projecting dripstones on the left gable indicate the original roof line of a single-storey wing, extensively rebuilt in the late 20th century. This rebuilt section includes modern windows, a gabled half-dormer in the rear roof slope, and a large, round-headed window in the end gable.

The agricultural buildings at the rear have been modernized and extended, with the barn featuring timber casements and French doors. The rear addition has a glazed roof and tall, round-headed windows along one side.

The two ranges are linked by a lobby on both floors. The rear range originally comprised a hall with a gable-end fireplace and a small, unheated service room. A collared truss features an arched doorhead cut into the collar. The smaller front range originally consisted of a single room, which served as a parlour as the houses were integrated. It may initially have been a small, independent dwelling unit. A mural stair is built into the back wall, providing the only access to the first floors of both ranges.