The estate, now known as Roundway Park, continued in the Colston family until circa 1948; owners included Charles, 1st Baron Roundway (1854-1925) and Edward, 2nd Baron (1880-1944). Further renovations were made during the Colston's ownership including moving the main entrance to the courtyard, the addition of a porte-cochere and a semi-circular balustrade, refurbishing the greenhouse into a library, transforming the sash windows into mullion windows and the addition of bedrooms and bathrooms. The 2nd Baron's wife Gladys, Lady Roundway continued to live at Roundway Park until 1949 before moving to London, at which point the estate was divided up and sold.