No.16 and Attached Railings

No. 16 is a house dating approximately to the 1790s, with alterations in the 19th and 20th centuries, designed by John Palmer. It is constructed of limestone ashlar to the front, limestone ashlar and rubble to the rear, with a Welsh slate double-pile parapeted roof and a mansard to the front—rebuilt as a full third floor to the rear. The rear has a coped gable wall with two limestone ashlar stacks, including some early clay pots to the left. A staircase is located to the rear.

The house is three storeys, with an attic and basement, and has a three-window front. The first floor has three plate glass, horned sash windows with wrought iron balconettes. The second floor has three six/six-pane sashes in plain reveals; the ground floor has two plate glass, horned sashes in plain reveals with stone sills to the left. A six-panel door with reeded and raised and fielded panels and a decorative fanlight is set within a square-headed, plain reveal, approached by a single step to a pennant-paved crossover with a cast iron footscraper. A 20th-century six/six-pane sash window with a timber sill is in the basement, which has an additional crossover covering part of the area, and no area steps. There are one double and one single dormer window with plate glass and two/two-pane sashes. The rear elevation largely retains early glazing bar sashes; the mansard has been rebuilt to form a full third storey. Two 20th-century garages are attached to the rear.

External features include a band course over the ground floor, serving as a sill band to the first-floor windows, a separate sill band to the second floor, a moulded eaves cornice, and a coped parapet. A lead downpipe on the left side is shared with No. 15 Park Street. A painted number is above the door.

The interior was not inspected during the listing process. The house was part of an incomplete St James’s Square development, and the upper part of Park Street was started to the design of John Palmer and continued, but not completed, in the design of John Pinch after 1808. Originally, the street terminated at All Saints Chapel, and was intended to continue in a northwest direction as Regent Place. Attached wrought iron railings and a gate, with shaped tops on limestone bases, are also part of the property.