His uncle, John Berkeley, 1st Baron Berkeley of Stratton, secured Charles employment with James, Duke of York until the Restoration. Charles was subsequently created 1st Baron Berkeley of Rathdowne, co. Wicklow, Ireland, and 1st Baron Fitzhardinge of Berehaven, Co. Kerry, Ireland, on 1 July1663. He was created 1st Earl of Falmouth [England] on 17 March1664, and 1st Baron Botetourt of Langport, Somerset on the same day.
He married Elizabeth Bagot,[1] who as the widowed Countess Falmouth became a mistress to King Charles II of England.