Former Cowhouse at Bryn Nantllech

Five bay cowhouse with catslide roof over a lean-to addition at the left (SE) end of the front elevation and a small flat roofed addition at the right (NW). Built of rubble masonry; slate roof with tiled ridge. The entrance elevation faces the yard and house to the NE and has 3 doorways, 1 to the far left (to the lean-to addition), 1 offset to the left and one to the right with 2 modern timber casement windows between, that to the left in a partly blocked doorway; all openings have timber lintels. There is a further doorway and window to the flat roofed addition at the NW corner. There is a ventilation slit in the apex of the left gable return, and a pitching door in the apex of the right gable return.

Exposed roof of 5 bays, roughly chamfered queen post trusses with angled braces; that to the right of the entrance (doorway offset to the left end) bears the incised date 1793. Slate partitions at SE end.