The section of the verandah south of the entrance has been filled in with boarding, but this would be easy to remove. The verandah floor is asphalt over flagging, while a wrought iron fence with dagger tops and on a rounded stone plinth runs right around the verandah. There is an original double gate matching the fence. Double doors on the western end of the verandah where it abuts another building may be original. Windows are simple double sash, single paned. Wrought iron ventilator grills are a feature. Stone steps form the porch are now tiled and probably raised form their original level. The other early buildings are in keeping with the original one and are joined to it by various additions. The 1912 Castleden building, also fronting Wharf Street has bosses and anchoring points, possibly for a former awning. There is evidence that there was originally a verandah between these two building to match that of the 1860s building. This latter building also has a hipped roof. There is a part hipped, part gabled roof with boxed eaves to the Menkens 1903/Castleden 1909 building. The 1903 Menkens section has two tall, rendered chimneys. Window openings on the Centenary Road facade of the 1909 additions are very plain, the large windows are double sash, single pane. Large exhaust fans and associated ducting mar the roofs of the 1903-09 section and the original building, but could easily be removed. The recent infill sections have lower, flat corrugated iron roofs with a bullnose to street frontages. While there is some original joinery, the interiors have been largely altered and compromised. The condition of the complex was reported as being fair to good as at 13 December 2001. Various additions and alterations have been made (e.g. The terracotta roof tiles and possibly the gabled porch on the east side). These do not reduce the historic significance of the building. They do detract from the integrity of the structure as an historic artifact. Argyle House is a very good example of an early Victorian cottage (the original 1860s building) that has developed with the addition of many sympathetic buildings in a pavilion style of growth. It is thought to be the oldest surviving structure on this site. It may contain valuable evidence of early building practices and materials. The building has important associations with the Australian Agricultural Company, a principal influence in the early development of Newcastle and the Coal Mining Industry. The only known surviving structure, apart from the pier remnant from the iron bridge, of the early operations of the A.A Coy in the CBD.