Cavendish Square Marylebone W1G Timeline News and progress updates from Cavendish Square new development in Marylebone W1G Post a new milestone Westminster Council is set to approve plans for using the square as a pop-up event space for four months this summer. A temporary theatre would be set up on the... 24/05/2021 by Buildington Plans Approved Westminster Council has unanimously approved Reef Group's redevelopment plans for the car park underneath Cavendish Square in the Harley Street Conservation area. The... 01/05/2020 by Buildington New on Buildington! Cavendish Square London is a proposed redevelopment of the car park underneath the historic Cavendish Square will offer medical, retail and commercial space on four... 05/02/2020 by Buildington