Walled Garden at Llantysilio Hall

The Walled Garden at Llantysilio Hall is a large, almost square area of sloping land, measuring approximately 71.6 meters by 79.2 meters. It is enclosed by stone walls on three sides, which are lined with brick on the inside and topped with a cavetto edged stone coping that slopes outward. The walls vary in height, generally around 2.5 meters but rising to 3.5 meters in places. They are faced with red brick, likely made locally, and laid in an irregular Flemish bond, following the slope of the ground.

At the top of the walls, brick piers with stone cornices flank a gated entry that features five steps leading from a walled cross-walk running east-west between the garden and the lawns. Similar brick piers are found at the steps that connect the cross-walk to the lawns. Midway down the garden, there is a narrow terrace with a small pond, which was the former location of a sundial. The fourth side of the garden, at the bottom, consists of a low stone wall that forms a simple ha-ha, now topped with a box hedge.

In the southwest corner, there is a contemporary hemispherical summerhouse or alcove, which has a gabled facade with stone copings that rise to a carved feature and a pedestal for a finial, although the finial is now missing. The interior of the summerhouse is rendered and lined out, featuring semi-circular slatted seating. The first edition Ordnance Survey map indicates that there may have been a corresponding alcove at the southeast corner of the garden. Additionally, the upper section of the west wall has been rebuilt in the late 19th century to incorporate coldhouses or potting sheds.