Situated on a level platform of land to the southwest of Bryn Gefeiliau is a roofless ruined building. The building is rectangular in plan, measuring 7m by 4m, with stone and slate walls suriving to an average height of 2m, with a 3.5m-high western gable end. There is a single 1m-wide doorway in the eastern gable end which has been reduced to the level of the north and south walls. The northern wall is pierced by a single window. The building is depicted in this location on the 1st edition 6" Ordnanace Survey map of 1891, at the junction of three field boundaries. M.Railton, NPA, 9th December 2010.
