Gwynfryn and Isfryn

Gwynfryn and Isfryn is a former accounting house for the Lisburne Mines that has been converted into two houses, Gwynfryn and Isfryn, located to the east. The building is constructed from whitewashed rubble stone and features a slate hipped eaves roof. The eaves are flat boarded and were renewed in the 20th century. It stands two storeys high with a four-window range; the upper windows are positioned under the eaves with slate sills, while the ground floor has concrete sills.

The south front of the left half (Gwynfryn) has a roof and first floor that are canted at the southwest angle, featuring one first-floor 16-pane sash window. The south front also has two similar sashes on the first floor to the left and one on the ground floor, which is aligned between the upper windows. There is an inserted narrow door to the right of the right window, and an old stone door lintel is visible to the left of the window. The right half (Isfryn) has a two-window range of horned 4-pane sashes and a brick chimney on a stone base at the eastern end wall. The eastern end of the roof extends over a two-storey, three-bay veranda supported by two turned posts at the first floor, with the right bay weatherboarded and two iron posts below; the second bay is infilled. Inside, there is a doorway and a first-floor 16-pane sash with brick repair work on the left side.

The northern rear elevation facing the road features a double flight of rubble stone and slate steps to the right, leading to double three-panel doors of the former pay office, with a 9-pane sash window to the left. There is a large rendered stone chimney on the roof verge to the right, accompanied by a smaller rendered brick shaft. A masonry joint between the left and right parts indicates that the western half is the earlier section. The right half is windowless and has an added raking buttress and a projection to the left, which is the end wall of the veranda.

The interior has been altered and includes some six-panel doors.