Lower City Mills, West Mill Street, Perth

Lower City Mills, located on West Mill Street in Perth, is a former mill building constructed between 1803 and 1808 by John Stewart, a wright, likely incorporating earlier materials. The structure is three stories high and has a rectangular shape with four by five bays. It oversails its tailrace and features a pyramidal-roofed former kiln with a roof vent at the southeast corner. The walls are made of rubble with smooth raised margins, and the southwest corner is canted. The building has regular rectangular openings, with the south elevation featuring off-centre, later-added two-leaf timber entrance doors.

Inside, much of the original mill machinery remains intact, including a low-breast paddle wheel on the west side, although none of the machinery was in use as of 2009. The internal features include an elevator, sack hoist, an electric grain dryer, and shelling stones. The southern section of the mill has been converted into offices. The windows are predominantly 12-pane timber sash and case, with some having lower external timber shutters. The roof is covered with grey slates and has three piended roofs in the main section.