54, Harley Street W1

This is a pair of terraced townhouses built in 1904-05 by Niven and Wigglesworth. The building is constructed of Portland stone with a slate roof and is designed in a Domestic Georgian-Baroque Revival style. It is four storeys high, with a basement and dormered mansard roof. The building has three windows across the front.

The right-hand side features a square-headed doorway with an architrave and a keystone carved with a mermaid. Above this doorway, on the first floor, is a window with architraved surrounds and brackets carved with female heads, set below a bracketed cornice-cum-balcony with iron balustrade. To the left is a three-storey canted bay window. The ground floor of the bay is rusticated and features a carved keystone over the central sash window. The first and second floor windows within the bay are similarly architraved with head-figured bracket cornices, matching the window above the doorway. The third floor has three windows with eared architraves. All windows are sash windows with glazing bars. A plat band runs above the ground floor, and a cornice marks the top of the canted bay. A sharply profiled crowning cornice and blocking course finish the facade. Three corniced dormers are topped with panels on either side. Cast iron area railings are present.