47, Parliament Street SW1

No. 47 Parliament Street is a Grade II* listed end of terrace former clubhouse, built between 1864 and 1866 by architect C.O. Parnell as the Whitehall Club. The building is constructed from Portland stone and features a slate roof, showcasing a "Florid Italian" style reminiscent of 16th-century Venetian architecture. It stands three tall storeys high with an attic storey, raised on a basement.

The façade is three windows wide, with three groups of windows on the Derby Gate return and a four-window wide rear. The elevations are rusticated, with a central entrance on the Derby Gate return, featuring an archivolt arched portal that rises through the basement and ground floor, adorned with intricate relief carvings and flanked by pairs of Ionic pilasters. The ground floor windows on either side are designed as Venetian windows set in shallow panels, also flanked by Ionic pilasters and featuring carved spandrels.

On Parliament Street, the ground floor windows have pilastered jambs and archivolt arches, while the first-floor windows are architraved with pediments on consoles. The ground floor is framed by an engaged coupled column Ionic order, and the first floor by a Corinthian engaged order. The first floor on Derby Gate has tripartite architraved windows with segmental pediments over the center lights, set in shallow panels framed by Corinthian pilasters. The second-floor windows are architraved with cornices on consoles, and oval attic windows are set in the frieze below the cornice.

Additional architectural details include a plat band over the basement, a ground floor entablature that breaks forward over capitals with engaged urns at the corners, a second-floor entablature confined to the window bays, and a deep, richly carved frieze beneath the crowning modillion cornice. Stone "Venetian" chimney stacks rise above the corners. Parnell was also the architect of the now-demolished Italianate Army and Navy Club.