51-52 Castle Street, Aberdeen

51-52 Castle Street in Aberdeen is a townhouse dating from 1763, featuring three storeys and an attic, with a later public house on the ground floor. It is constructed from Loanhead granite ashlar with raised margins and is located on a prominent corner.

The elevation facing Castle Street has an eaves course and regular window arrangements on the first and second floors. Canted dormers are positioned on either side of the nepus gable, which has two attic windows. The ground floor has a later public house fascia that extends around the corner onto Marischal Street, with signage that interrupts the window line on the first storey.

The Marischal Street elevation consists of five bays, with the original door in the centre bay now blocked. To the far right, there is a multi-pane fixed tripartite window with stone mullions. A substantial moulded eaves cornice is present, along with a prominent triangular gable end above, which features a moulded arch and a shallow recess flanked by square attic windows.

The building predominantly has 12-pane timber sash and case windows and is covered with grey slates. Coped ashlar granite stacks are located on the north, south, and west gables, topped with terracotta cans. Recessed cast-iron rainwater goods are also present.

Inside, the Blackfriars Public House has been largely modernised and is now internally connected to 5-9 Marischal Street, which is also listed at category B. The interior features a 19th-century gantry, along with later additions and alterations, including stained glass believed to have come from a demolished chapel near Aberdeen.