Warwick House

Warwick House is a large town house built between 1770 and 1771 by Sir William Chambers, originally known as Errington House. While it retains some of Chambers' fine interior features, the house has undergone alterations, particularly in the early 19th century. In 1853, a canted bay was added to the south side, and the exterior was remodeled again in 1860, incorporating Renaissance details into the elevations that reflect an early 19th-century character.

The building stands four storeys high with a mansard roof that includes two tiers of dormers. The former entrance front facing Green Park is four windows wide, while the south side, which faces Stable Yard, has a broad, nearly blind return from the Park front, a canted bay, and a recessed wing with three closely set windows. The east side features three windows and a blind bay.

A channelled stucco porch projects to the east, featuring an Ionic columned doorway with a pediment. The Park front has recessed glazing bar sashes set in shallow architraves, with semicircular arched windows on the ground and first floors. A broad panelled quoin pilaster with fleur-de-lis detail is located to the right, topped by a deep main entablature over the second floor and a secondary cornice at the attic storey. The upper tier of dormers in the mansard is treated as oeil de beouf.

The immediate south return is blind except for a small "Renaissance" oriel and is decorated with large moulded panels that echo the detail of the quoin pilasters. The three-storey channelled stucco canted bay features a hipped roof and a wing with architraved sashes. The blind part of the east front also displays the same moulded panel detail.

Inside, the house retains Chambers' D-plan stair compartment, which includes a fine stone geometrical staircase and an elegant wrought iron balustrade with a scrolled S pattern. The northwest ground floor preserves plasterwork and a fine statuary marble chimney piece designed by John Walsh based on Chambers' designs.