Engine House at the former Nant Lead-mine

The Engine House at the former Nant Lead-mine is a large rectangular structure, measuring approximately 20 by 28 feet (6 meters by 8.5 meters) at its highest point. The building features battered limestone walls that rise about 40 feet (12 meters) and include squared quoins. The roof is missing.

On the southern elevation, there is a blocked round-headed opening made with voussoirs of dressed sandstone and a dated keystone, which is now overgrown. Additionally, there is a blocked entrance shaft located to the south of this elevation. The eastern side has a tall blocked opening with a timber lintel at the center and a tall narrow ground floor opening to the left, also with a timber lintel. There are remains of a central opening at the top.

The northern side features a blocked window with a timber lintel on the first floor and a blocked broad brick arch at ground level. The western side has a blocked ground floor opening to the right, a blocked first floor opening, and remains of a second floor opening.

The building was once plastered and includes a blocked arch with cut-stone voussoirs on the southern side. The northern side has a tall blocked brick arch, with a blocked square-headed opening on the first floor and a blocked second floor brick-arched opening. There is also a blocked opening at ground level on the western side. Inside, there are beam holes for two main beams.