108, Harley Street W1

No. 108 Harley Street is a terraced town house built around 1777 as part of the Portland Estate development, likely designed by John White in collaboration with the plasterer Thomas Collins, who were associates of Sir William Chambers. The house is constructed of stock brick with a channelled stucco ground floor and features a slate roof. It has four storeys, a basement, and a dormered mansard, with a three-window facade.

The entrance is marked by a broad semicircular arched doorway on the right, which is adorned with Coade stone vermiculated rustications and a head keystone. The door is panelled and flanked by sidelights, with a moulded doorhead and fanlight above. The upper floors have recessed sashes set under flat gauged arches. There is a plat band and sill band on the first floor, a cornice above the second floor, and a modillion cornice with a blocking course at the top. A cast iron balcony from the mid-19th century is present on the first floor, along with cast iron railings for the area below.

Inside, the house retains several original features, including a top-lit stone geometrical staircase with a wrought iron balustrade and a stucco mythological relief medallion above the marble chimneypiece in the ground floor front room. These features are typical of the high-quality speculative houses built in Harley Street during the 1770s.