Bog Cottage, attached garden walls and spring chamber at Upton House

Bog Cottage, along with its attached garden walls and spring chamber, is a garden building that has been converted into a cottage. It dates from the late 17th century, with some alterations made in the 20th century. The structure is built of red Flemish bond brick, featuring a string course and a painted moulded wood cornice. The roof is made of stone slate and has stone coped gable parapets with kneelers, as well as stone and brick end stacks. The original layout of the building is not clearly defined.

The cottage is symmetrical, with two storeys and an attic, comprising four bays. The ground floor has unglazed openings, and a half-glazed four-panelled door is set back in the fourth bay. The first floor features tall eighteen-pane sash windows, and there are gauged brick segmental arches throughout. The roof dormers above the central bays are pedimented and have leaded two-light casements. The return sides and rear of the building have been altered, with the rear being only one storey and an attic due to the sloping site.

The interior has not been inspected. It is believed that the cottage was originally built for Sir Rushout Cullen as a banqueting house. The attached garden walls on the left and right date from the late 17th to early 18th century, constructed from ironstone rubble with red Flemish bond brick and moulded stone coping. The spring chamber, which is attached to the left wall, was built in the 18th century and is a simple brick chamber against the hillside, featuring a segmental brick arch with a keystone and a brick vaulted interior.