Bank Barn Approximately 20 Metres North of Carthew Farmhouse

This is a bank barn, likely used as either a granary or a timber store, built around the 1840s. It is constructed from granite rubble with granite dressings and has a bitumen-grouted rag slate roof, featuring a later brick stack on the left side. The barn has a rectangular plan and is built into the bank at the rear.

The exterior is two storeys high and has a six-window range. The second and fifth windows from the left are blocked, while the others have simple windows, most of which include vertical glazing bars. There is a central doorway, along with doorways on the left, far left, and far right, all fitted with ledged doors. The ground floor also features three windows and a small ventilator window. Dove holes are arranged in rows and singly beneath the eaves, each with ledges. Stone steps lead to a plank door at the rear.

Inside, the barn retains original collar trusses and other roof timbers. This building is part of an interesting and planned group that originally served mixed uses of saw-milling and farming. It is located on the north side of a U-shaped farmyard, with the mill attached to its east side.