Marsh House, with attached garden wall

Marsh House, with an attached garden wall, is a two-storey house that has been fully rendered and painted. It features cambered-head rusticated window surrounds, a plain band at first floor level, and rusticated quoin pilasters. The roof is made of Welsh slate with ridge tiles and rendered stacks. The house has a central entry with a continuous outshut and four windows: two on either side of the door, with the left-side windows positioned much closer together than those on the right. The ground floor windows are modern casements with 8 + 8 panes, while the first floor windows are 8 over 8 pane sashes. The central door is modern and set within a small porch that has a lean-to slate roof and a glazed outer door. The steeply pitched roof has stacks on both gables, with the left-hand stack being larger. There is a casement window in the right gable end of the outshut. The rear elevation features a roof that sweeps down over the upper storey and has two main late 20th-century windows below. A lateral stack from the Hall projects from the center of the rear roof slope.

The garden forecourt is enclosed by limestone rubble walls, partly painted, which contributes to the group value with the adjoining house. During a resurvey in October 2003, only the three main ground floor rooms and the staircase were observed, all of which have been altered by modern changes. The kitchen on the west side contains a possibly 17th-century fireplace with an oak lintel and a Victorian oven, alongside the remains of a much rebuilt firestair. The entrance hall features a changed lateral fireplace with the staircase running behind it from the left. The east parlour boasts a good plaster ceiling dating from around 1700, which includes a central roundel. This sunburst design with a lady's head centerpiece is related to the Thomas Stocking ceiling from 1766-67 in the Drawing Room at Fonmon Castle, suggesting it may have been added at that time when Marsh House was part of the Fonmon Castle estate. The staircase has rebuilt pine treads and retains a small section of splat baluster.