It was extended and altered between 1713 and 1715 by Sir Thomas Twysden; much of the panelling in the house dates from this era.

[4] In 1938, the estate was purchased by the East Malling Trust for Horticultural Research, together with around 200 acres (0.81 km2) of adjoining land.

[3] The house is occasionally open to the public and offers guided tours, as is the collection of trained trees alongside the walled garden.

[7] In 2018, nearby residents complained over plans to turn a former research site owned by East Malling Trust near the house into 400 new homes.

The trust explained that the money gained from selling the land to developers would be re-invested in Bradbourne House and gardens.