The broch was 19 m wide, with an east-facing doorway. The massively thick wall was built with an inner and outer face separated by a passageway that partially survives on one side. The original floor level of the broch is 1.8 m below the present ground level, and the flat slabs underfoot in the doorway are the roof of the original passageway into the building. This passageway led to the ground floor of the broch. There was also an upper floor, supported on a row of stones projecting from the edge of the north wall.