Former British Ironworks office and foundry quadrangle

The buildings form a closed quadrangle and are constructed of coursed sandstone with Welsh slate roofs (partially missing or replaced with corrugated iron). The whole quadrangle is single storey apart from the north-east pavilion which has two storeys and is rendered.

The front range of the quadrangle, facing northwest, formerly consisted of two square pavilions with pyramidal roofs and a lower connecting range. The right hand pavilion appears to be unaltered and is consistent with a design of the 1820's or 1830's. It has ashlar quoins, eaves band and window and door surrounds, with evenly coursed sandstone between. The windows were sixteen pane wooden sashes, of which two survive following some fire damage. The main elevation has two windows with a central doorway with a flat hood, and there are three openings to the north-west elevation,one partly blocked. The left hand pavilion has identical detailing to the ground floor, but with a fanlight above the doorway and alterations to the window frames made at the turn of the century. The former eaves band now forms a string course and the walls have been rendered. There is a hipped slate roof with chimney gablets. Tall casement windows have been placed in the upper storey, of four bays with one narrow central window to each outer side. The linking block is of rubble sand stone with dressed quoins and window surrounds. The windows are evenly spaced with shallow segmental arches and stone cills, containing metal small pane frames or timber cross frames with leaded light panels.

The south west elevation behind the pavilion has seven windows to the outside and four to the inside. The south eastern is built into the slope on the outside but has seven openings to the inside.

The whole complex has suffered extensive damage since listing in 1994; this is especially the case in the north west corner, which is now (January 1997) in a very damaged state.

Inside, the two-storey office building has a central hallway and staircase with four main rooms on each floor. The rooms to the south-west have corner fireplaces. The fire-damaged pavilion opposite has part of a magnificent pyramidal roof structure of massive timbers giving a large clear space interrupted only by later inserted walls. The trusses are of king post design with linked trusses at right angles. The remainder of the workshops also have king post roof trusses creating large open spaces. Cast iron floor plates typical of foundry buildings can be seen in some places and there are large areas of its south west side opened through the wall to cast molten metal. The air furnace is scheduled as an Ancient Monument (MM 221). Significant remains of casting pits and a waterwheel or small steam engine to power workshop machinery may exist below floor level.