Summerhouse, Garden Wall and attached privy at Gwerclas Hall

The summerhouse at Gwerclas Hall is a tall three-storey structure set within a garden wall. It is built of brick and features sloping pilasters on each side and a gabled slate roof. The ground floor has a wide arch with a slight projecting drip course, leading to an open area that includes full-width stone steps and additional wide stone steps in front. On the first floor, there are two 12-pane hornless sash windows with exposed boxes. There is evidence of what may have been a diamond-shaped clock fixed at the gable. A doorway in the left wall provides access to a flight of external dogleg stone steps leading to a plain boarded door on the first floor. Another flight of external steps at the rear gives access to a small attic door, and there is a small gable stack at the rear.

The surrounding garden walls extend north and south from the summerhouse and return eastward to join the Hall at its north-west corner, as well as the rubble stone wall lining the drive to the south. These walls are made of brick with flat stone copings. There is a gateway immediately to the north of the summerhouse, which is not original. The southern wall features a square-headed doorway in the center, while the northern wall has a lancet-headed doorway opposite. Attached to the north side of the wall at the north-east corner is a brick privy with an asymmetric slate roof, which has a lancet doorway in the west wall with a plain boarded door. There is a blocked arcade on the garden side that has been partially reused for a central doorway, which also has a plain boarded door and a leaded window to the right.

The ground floor of the summerhouse retains evidence of a plastered finish and framing around the arched opening, suggesting it was originally enclosed. The interior of the first floor has been reinstated, featuring a slate fireplace on the west wall with a timber surround, oak skirting, floorboards, shutters, and shutter boxes with aprons. The attic was not inspected.