Boiler House (Mill Building 49) And Stalk, Paper Mill (Former), Guardbridge

The Boiler House and Stalk at the former Guardbridge Paper Mill were built in 1901 and 1949. The boiler house is a large, rectangular building that represents the mill's post-war revitalization, while the stalk is the only remaining industrial chimney from 1901. These structures are significant landmarks located at the northern end of the paper mill site, near the Motray Water, and they stand out in the flat estuary landscape.

The boiler house features an eight-stage, flat-roofed eastern range and a five-stage gabled western range. It is constructed with a steel frame and brick cladding, showcasing a grid-pattern design with multi-pane windows. The eastern range has an eight-bay elevation facing the River Eden, with three return elevations that include large timber doors at ground level. The gabled western range has four-bay elevations on the north and south sides, with the northern elevation displaying a polychrome gablehead and an almost full-width raised ridge ventilator.

The stalk is the last remaining industrial chimney at the Guardbridge Paper Mill. It is a battered, circular structure made of banded polychrome brick, reinforced with steel ties. The stalk has been reduced in height, and its top was rebuilt using fireclay brick, which is banded and corbelled at the apex. The height of the stalk was reduced in 2011.