9 And 10, Union Passage

9 and 10 Union Passage are former shops with accommodation above, dating from around 1806, although they have 20th-century additions. The buildings were likely overseen by City Architect John Palmer, based on earlier designs from around 1791 by Thomas Baldwin. They are constructed of painted limestone ashlar with roofs of Welsh slate, which are mostly hidden from view.

The buildings have a single depth plan and are back-to-back with Union Street. They rise to four storeys and feature a splayed corner with Northumberland Place. The façade facing Union Passage has five windows arranged in a three-to-two pattern, with one window at the corner and two facing Northumberland Place, which are grouped with No. 16 Union Street. No. 9 has three windows on each upper floor, all late 19th-century plate glass sashes set in plain reveals, with a sill band on the first floor. The ground floor is blank with a modern service door, and the original shopfront has been removed. There is a moulded cornice above the second floor, and a full-height storey above that has no windows, topped by a parapet and a mansard roof.

No. 10 features sill bands at each floor and six-over-six sash windows, with blind windows on the first and third floors on either side of the corner. The top floor has a casement window at the corner. The building stands full four storeys tall and has a late 20th-century shopfront in a 'Regency/Victorian' style that wraps around the corner into Northumberland Place, complete with a cylindrical lantern at the second floor level.

The buildings were part of an improvement scheme for the city center following the Bath Improvement Act of 1789. Union Passage is a historic street that has been in use since the Saxon period; it was previously known as Cox Lane and is depicted on Smith's map from 1588.