A two celled structure surviving mainly at footings level only. Aligned north south and sitting on a flat platform on the south side of the Afon Dyffryn. The main cell is square, 6 m by 6 m in size. The south wall of this cell partly survives incorporated into a sheep pen built subsequently (NPRN 500911) and contains a small fireplace. At the south end a second cell is smaller, 3 m by 3 m in size. Methodology: 30 m transect survey. Positional accuracy: less than 10 m. Tolerance of accuracy: +/- 5m. K. Laws, EAS Ltd, 26/11/2007.
