4, Museum Square

No. 4 Museum Square is a terrace house located at the corner with Ely Place, designed alongside No. 3 Museum Square as entrance buildings to the Castle Estate. It is constructed of local brown brick and features a slate roof with a side stack. The building stands three storeys tall with a basement and has three bays. A shallow stone-coped parapet and a stone cill band adorn the top. The windows are all sixteen-paned recessed hung sashes set in cambered gauged red brick arches, with three blind windows, one on each floor. A wooden Doric portico, elliptical in plan, has a flat canopy and a moulded cornice, leading to a six-panelled door. The return to Ely Place has two bays with one twelve-paned hung sash window on the first and ground floors, along with blind windows. There are also two fire insurance plaques on the building.