Her portfolio features award-winning projects, including the gardens at Highgrove House, the private residence of King Charles III[1] After buying a semi derelict Wiltshire mansion called The Ivy and exploring their mutual passion for building restoration and garden design, Isabel and her husband Julian Bannerman were invited to join a team building a modern grotto under British sculptor Simon Verity at Leeds Castle.
[7] Simon Sainsbury and Stewart Grimshaw enlisted the Bannermans in 2000 to redesign the Entrance Garden and Pleasure Grounds area, as well as enhance the Long Walk at Woolbeding House in Sussex.
[9] The Bannermans were subsequently commissioned by the Duke and Duchess of Norfolk to create "The Collector Earl’s Garden" at Arundel Castle in Sussex.
[11] In 2010 the Bannermans completed the Queen Elizabeth II September 11th Garden, located in Hanover Square in the Financial District of New York City, after receiving an invitation to enter a competition to create the design.
They have lived in several historical properties throughout their career, including Hanham Court near Bristol, Trematon Castle in Cornwall, and Ashington Manor in Somerset.