In 1772 it was purchased by George III as a home for two of his sons and in 1838 it became the home of his seventh son,  the Duke of Cambridge (1774 – 1850), who extended the house. Prince George, Duke of Cambridge (1819 – 1904) owned the house after the death of his mother, The Duchess of Cambridge (1797 – 1889), and when he died in 1904 it was owned by Kew Gardens.
In 1772, King George III purchased Kew House as a home for two of his sons. Later, in 1838, it became the residence of his seventh son, the Duke of Cambridge (1774–1850), who expanded the property. After Prince George, Duke of Cambridge (1819–1904) inherited the house following his mother's death, he owned it until its transfer to Kew Gardens upon his own passing in 1904.