Learn more about this magnificent property and its history before the trust. Wentworth Woodhouse is a Grade I listed country house in the village of Wentworth. The building has more than 300 rooms, with 250,000 square feet (23,000 m2) of floorspace, including 124,600 square feet (11,580 m2) of living area, and was – until it ceased to be privately owned – often listed as the largest private residence in the United Kingdom.