Llantysilio Hall (nprn 27424) is located to the north-west of Llangollen inside a bend in the river Dee. It is noted for its fine axial arrangement of house, walled garden and avenue, dated to the eighteenth and nineteenth century, in a picturesque parkland location (700085).

The garden is laid out to the east, west and south of the house (27425). To the east and west the ground is level, to the south it drops steeply down towards the river. The walled garden lies below the grass slope in the middle of the north-south axis with the house and avenue, and was built as an adjunct to the earlier, eighteenth-century, house which was later incorporated into the nineteenth-century garden. It is square and surrounded on all sides but the south with composite walls of stone lined internally with red brick, about 3.5m high. The south side is bounded by an iron fence, ditch, and revetment wall topped by a box hedge. The entrance is in the middle of the north side, with a gate and steps down onto a central gravel path flanked, half way down the garden, by two large yew hedges; the rest of the garden is rough or mown grass, with old espalier apple trees lining the paths; further paths run along the north, east and west sides. Still surviving are some old pear and plum trees lining the walls, an old mulberry tree, and a large bay tree. In the south-west corner is a small brick pavilion, a lean-to glasshouse against the west end of the north wall, some glasshouse footings outside of it, and a potting shed in the north-west corner. There is a small rectangular pond in the middle of the north-south central axis.

Sources:
Cadw 1995: Register of Parks and Gardens of Special Historic Interest in Wales, Clwyd, 164-6 (ref: PGW(C)60(DEN)).
Ordnance Survey 25-inch map, sheet: Denbighshire XXXIV.10 (second edition, 1895).

RCAHMW, 11 April 2022