No. 17 and Attached Railings

House. Built around 1786, with alterations in the 19th and 20th centuries. It has been attributed to John Palmer and was built by George Bottle. The front is limestone ashlar, with rubble below the basement windows and to the rear. The double-pile, parapeted mansard roof incorporates Welsh slate to the front and rear, along with a coped party wall and two ashlar stacks to the left. A staircase is positioned at the front.

The house is three storeys high, with an attic, basement, and sub-basement, featuring a three-window front. The first floor has three six-over-six sash windows, lowered and with three fixed panes added beneath, all in plain reveals with stone sills and wrought iron balconettes to the centre and left. The second floor has three six-over-six sash windows in plain reveals. The ground floor has two six-over-six sash windows in plain reveals with stone sills and wrought iron balconettes to the left, and a six-panel door with flush moulded, fielded, and glazed panels within a pedimented Doric doorcase; one step leads to a pennant paved crossover with a pair of cast iron footscrapers. The basement has two six-over-six sash windows in plain reveals with stone sills, a 20th-century door under the crossover, area steps, a gate and a blocked opening to the sub-basement. There are two single dormers with six-over-six and eight-over-eight sashes. Architectural details include a band course over the ground floor, a sill band to the second floor, a modillion eaves cornice, and a coped parapet. The rear elevation features six-over-six sash windows, including single and double dormers, and a Venetian window to the ground floor; a partially lead downpipe is present on the right.

The interior was not inspected during the listing process.

Attached wrought iron railings and a gate feature urn heads and urn finials to the left, centre, and right, sitting on cast iron buns with pennant bases.

The building was developed in conjunction with Portland Place. The development involved parcels of land demised and let out on building leases, along with freehold land conveyed and released.

Historical information is documented in the Hensley Family Papers and a Plan of the Parish of Walcot, surveyed in 1740.