Trannack Mill Cottage, Including Wall and Bollards to the Front

Trannack Mill Cottage is a miller's house with an attached cottage, including a wall and bollards at the front, dating from the early 18th century. It is built of granite moorstone rubble with dressed granite quoins, jambstones, and ground floor lintels, and features slate sills. The roofs are covered with asbestos slate, with the original house having a steeper roof that was probably originally thatched. Each gable end has a dressed granite chimney stack, while the left gable end of the cottage has a brick chimney.

The building has a long, shallow depth and is situated near a steep slope at the rear. It consists of a double-depth cottage on the left with a single-storey lean-to, the original house in the middle with a two-room plan, and a single-storey former cartshed or forge on the right. The house features a wider room on the right, likely the hall or kitchen, and a narrower room on the left, probably the parlour, with an entrance lobby and stair between them. The cartshed has been converted into domestic accommodation in the 20th century.

The structure is two storeys high and has a three-window front. The cottage on the left has a single window front and a doorway to its right, while the house has a nearly symmetrical two-window front with the doorway positioned left of the middle, nearly central to the window openings grouped towards the left. The cottage and cartshed have 20th-century windows and doors in the original openings.

At the front of the house, there is a raised pavement bordered by granite monolithic bollards, with iron railings in front of the door and a wall made of large granite monoliths on the right side. Although the 20th-century windows and doors detract from its appearance, the robust granite construction and fine stone chimneys are particularly notable features.