Auchmar House is the centrepiece of Clairmont Park, the estate of the Honourable Isaac Buchanan (1810–1883), one of Hamilton's most influential citizens.The manor house, its several remaining outbuildings, and stone orchard wall occupy about 8 acres (32,000 m2) of land which include most of the original built features of the estate.Auchmar House and the remaining contiguous portion of the Buchanan estate is a unique heritage asset owned by the citizens of Hamilton.Auchmar House is recognized as an outstanding example of the domestic Gothic Revival and, with its surrounding acreage, is a very rare example of a mid-Victorian estate in Ontario surviving in relatively intact condition.In addition to his parliamentary career and involvement with numerous public and private bodies, Buchanan became a writer of some note on the subjects of currency and trade and is generally credited as being a formative influence on John A. Macdonald's National Policy.