Pentwyn farmhouse was originally a Tudor cruck house dating from c. 1550-1610. It has a steep slate roof, rendered rubble walls, and front steps back slightly on right. A single storey and attic building with a brick end chimney to the left; 2-storey slated wing to rear; asymmetrical windows, and 3 gabled dormers. It has been modernised in recent times.

Reference: Cadw listed buildings database.