Ty Mawr, Porthgain

Green granite rubble rectangular structure, externally of two storeys with large cambered-head upper windows, five each side, four to south end. Sides and south end have broad low ground floor openings with timber lintels. There was formerly an open lean-to range along W side and two long low sheds running S from S end. S end has corbelled rough stones vertically up to gable apex, presumably for an intended addition. North end has large lean-to built in two stages, first in stone with arched doorway each end then in brick, single slate roof carried over. These two sections are marked ‘Engine House’ and ‘Boiler House’ on 1896 plan and the stump of a removed square brick stack remains at NE angle.