Former engine manufacturing building at former Neath Abbey Ironworks

Walls of former engine manufacturing building, rubble stone with some tooled sandstone. Roughly L-shaped of three ranges, the original range to N has lost front wall almost entirely, the added range further S has front wall of higher quality squared tooled sandstone. Original range has front wall missing except for short piece at right showing windows to have had cambered heads with stone voussoirs and keystones. End wall has indications of third or attic floor, left side has two first floor windows and one centrally below similar to front wall, sills and part of jambs of 2 above, and right side has broad cart-entry arch to ground floor and broad large opening above, all with stone voussoirs and all but cart-entry blocked. Rear wall of 8 bays, cambered headed windows with sandstone voussoirs and keystones, blocked in red brick. Step in wall above first floor. Added range has front wall of 6 broad elliptical arched entries under 9 cambered-headed windows. Impost band to ground floor, and remnant of cast-iron glazing. Rear of 10 bays similar to earlier range to left, stone voussoirs to cambered-headed openings, remnant of cast-iron glazing windows with small panes. Doors in sixth bay of first floor and first and sixth of ground floor, the last with very low doorhead. Rear has row of iron brackets for former channel to water-wheel across both ranges. Attached to S is much altered added range with blocked very broad arch with stone voussoirs between 2 blocked roundels, both part obscured by buttresses. Wall then steps down over brick-arched entry to modern garage.

Against back of front wall of original range are 7 cast-iron piers formerly holding an axial beam along wall. The rear left corner of this range has a masonry indent with cast-iron beam built into wall and carried out to another cast-iron pier. Piers are tapered T-plan with thickened heads. Within garage at S is long wall running back with a very large stone-voussoir arch and a door also with stone voussoirs.