Bus passing office building Heron Tower on Bishopsgate in the City of London. The Heron Tower, also referred to as 110 Bishopsgate, is a newly built skyscraper developed by Heron International and designed by Kohn, Pederson Fox (KPF), one of the most respected architectural design practices in the world.As a whole the building will comprise of approximately 461,000 sq ft (43,000 sqm) with office accommodation up to the 37th floor, and the uppermost 3 floors occupied as a restaurant with sky bar and terracing.3,300 sqm of photo-voltaic cells contribute significantly towards the BREEAM rating of "excellent"