Stowe House in the parish of Kilkhampton in Cornwall, England, UK, was a mansion built in 1679 by John Grenville, 1st Earl of Bath (1628-1701) and demolished in 1739. The Grenville family were for many centuries lords of the manor of Kilkhampton, which they held from the feudal barony of Gloucester, as they did their other principal seat of nearby Bideford in Devon. It is possible that the family's original residence at Kilkhampton was Kilkhampton Castle, of which only the groundworks survive, unusual in that it had a motte with two baileys.
The Grenville family's earliest seat was in their manor of Bideford in Devon, but from the 14th century they were also seated at Stowe. The last house on the site was built in about 1675 by John Granville, 1st Earl of Bath (1628-1701), created in 1660 in recompense for his great assistance in the Restoration of King Charles II, Baron Granville, Viscount Granville and Earl of Bath.
The house was built of brick with stone dressings and formed the shape of a rectangle, of three floors with hipped roof incorporating dormer windows and topped by a cupola, eleven bays wide by seven bays deep. There was an extensive deer park with formal gardens including fountains and statues. It was of similar style to Coleshill House, Lindridge House (demolished) and most comparable to Belton House.
Charles Granville, 2nd Earl of Bath (1661–1701) succeeded his father in 1701 but died in a shooting accident, possibly suicide, shortly afterwards. He left as heir his seven-year-old only son William Henry Granville, 3rd Earl of Bath (1692-1711) who died in 1711 aged 17 without progeny. The inheritance was divided between the second earl's sisters and a cousin George Granville, Baron Lansdowne (d. 1735), after whose death the family became extinct. The house was demolished in 1739.