The design of this late 17th century coach house was intended to emulate that of a small manor house and was particularly placed to be publicly visible to all visitors. The architecture of the building was intended to represent the fashionable, wealthy and high-status image of its creator, the politically driven Thomas Pelham, Duke of Newcastle.

dragon-beams and angle ties with moulded detail are included within the roof construction at each hipped terminal. There are two types: stub-dragon beams at an end open to the roof and full sized beams intended to support a loft floor at the opposite end of the building.

Tucked away above an inserted ceiling, the remains of part of a crown post roof dating to at least 1300 were observed. The four-way braced crown post survives above the later first floor ceiling and is significant in terms of construction, comprising an early and rare bare-faced lap joint between the two truss braces and the collar

Detail of the bare-faced lap joint