57a Union Street, Hamilton

57a Union Street in Hamilton is a mid-19th century lodge that features a two-storey rectangular plan with an adjoining tower and a two-storey and attic coachhouse/stable, forming an L-shape on sloping ground. The building is designed in an Italianate style, constructed from stugged and snecked sandstone rubble with stugged ashlar dressings and a slate roof. It has a base course, various band courses, and sash and case windows in different patterns, including round-headed windows with ashlar hoodmoulds on the lodge. The eaves are bracketted with plain bargeboards, and the ridge stacks have unusual round-corbel coping.

On the east elevation, the tower is centrally located with a segmental-arch carriage entrance. There is a four-pane round-headed window on the first floor, topped with a consoled timber pediment. A door is located on the left return elevation, along with two cross-pattern arrowslit ventilators on the first floor. The roof is shallow pyramidal with a large weathervane finial. The gable to the right is advanced and features two- and four-pane tripartite canted windows, with a four-pane round-headed window above that has a cast-iron window guard. There is a blocked door on the left return. The left gable is recessed and has stairs leading to the garden at a lower level, along with a pigsty and poultry house. The principal floor is blank, with a small round-headed window in the attic.

The north elevation shows the lodge to the left with a four-pane round-headed window in the gable at the first floor, though the ground floor is masked by the falling ground. To the right return elevation, there is a door, two windows, and a carriage arch. The stable/coach house is recessed to the right and features a large sliding door, a twelve-pane window, a large two-leaf door, a smaller door, and a haydoor with a gabled roof above.

The south elevation includes two doors and three partially boarded windows on the lower floor, along with two windows on the principal floor, all having ashlar margins at the top.

The boundary and terrace walls consist of a segmentally-coped stugged ashlar wall along Union Street, rubble boundary walls to the east and west, and two ashlar gatepiers to the west, along with various garden terrace walls and steps.