Early 19th century, stone, outbuildings below and living quarters on first floor dated 1802. Associated with ironworks, and with Rhymney House, now Ffynnon Glas.

Stone range, dated 1802, of stables for the Union Ironworks (NPRN 34143), subsequently converted into dwellings known as "Granary Row" (NPRN 40480) and then into Old Furnace Farm & Outbuildings (NPRN 20519). Site visited by B A Malaws, R F Suggett & I N Wright, 21 May 1996.