South east wing to Chetham's Hospital (former Manchester Grammar School)

The south-east wing of Chetham's Hospital, formerly known as the Manchester Grammar School, is a school building that is now part of a music school. It was constructed between 1873 and 1878 by architect Alfred Waterhouse. The building is made of red brick with sandstone dressings and has a concealed roof. It features a rectangular plan that runs parallel to the street and is part of the east side of the courtyard of Chetham's Hospital, designed in the Tudor style.

The structure consists of three storeys above a basement, with a four-storey gate tower. The facade has a layout of 1:1:6 bays, where the second bay contains the gate tower, which projects slightly forward. The stone basement is accented by bands between the floors, and the building is topped with an embattled parapet that includes coupled octagonal chimneys and corner pinnacles. The main range displays tall segmental-pointed two-light windows at the ground floor, featuring arched lights, while the upper floors have two-light sashed windows with shafts.

The gate tower on the left has a prominent large segmental-pointed arched doorway, which is moulded in four orders and framed by a rectangular stone surround inscribed with "SCHOLA MANCUNIENSIS 1870." Above this doorway, there is a small rose window set into the corbel of a tiered two-storey canted oriel that extends from the first and second floors. The third floor features a mullioned five-light window, and the tower is adorned with a cornice that has a corbel table, an embattled parapet with a central upstand, and a tall octagonal turret on the left side. To the left of the gate tower, there is a narrow bay with two-light windows on all floors, and a later addition is attached to the left of this bay. The rear of the building is similar in design. The interior has not been inspected.