Llys Cynhaearn

This is a house constructed in a free 18th-century domestic revival style. It is built of Trefor granite with slate roofs and clay hip tiles. The eaves project significantly, featuring raking soffits supported by scrolled wrought-iron brackets. The house is arranged as an L-shape, with the main range facing southeast over the gardens, and a lower, projecting wing creating a small forecourt at the entrance front. A more recent wing, built around 1998, runs parallel to the main range on the west side. Windows are replacements, but are of a sash design.

The garden front is notable for its symmetrical design, dominated by a broad central gable with a circular window near the apex. The fenestration is a 7-window range (3-2-3 bays), though the ground floor has been altered with the introduction of central French doors and alternating matched pairs of French doors and windows. Curved steps, added around 1998, lead to the central entrance. The central gable is flanked by hipped dormers. Symmetrically placed, battered stone stacks are positioned on either side of the garden front. The right-hand return has a round-arched entrance with a small-paned glazed door set within curving steps, with a dormer above. A screen wall, attached at an angle to the entrance forecourt, includes a round-headed archway and a pier with remnants of a finial.

The entrance front features a semi-circular tower with a conical slate roof, enclosing the angle between the main range and the projecting wing, forming a porch. A small-paned glazed door, possibly original or a close replica, is set within a basket arch, with a small recessed panel above. A single window is present in the main range to the right, and two dormers are in the roof above. The return of the cross-wing displays a shouldered stack with a circular feature displaying the carved arms of the Bishopric of Bangor. The upper floor of the cross-wing and the porch are slightly cantilevered, supported by stone corbels, a detail repeated in the parallel, modern wing.

The interior is arranged with axial corridors on each floor running along the rear, meaning the principal rooms face southeast to overlook the garden. A smaller service area is located towards the west end, now extended by the modern wing. The staircase and other service areas are contained within the original, projecting wing. The internal detailing is in 18th-century style, with much of the original design remaining. This includes 2-fielded panelled doors to all rooms; a double-hung door with a traceried fanlight to the service area; fireplaces with deep, bolection-moulded surrounds and slate cheeks on the ground floor (with a more ornate cast-iron fireplace in the sitting room), and simpler surrounds on the first floor. The staircase has widely spaced turned balusters and a deeply moulded handrail. It initially ascends in a straight flight before curving to follow the line of the porch tower, with a parallel curved landing leading to the upper room of the advanced wing, which contains a possible 18th-century, or a very good copy, curved cast-iron basket grate.