99 City Road

Sector

Office Building

Location

London, UK

Year

2023

Architects

KPF

Client

FMDC

3D Illustrations

KPF

The 99 City Road redevelopment envisions a 34-story, 59,000m² BREEAM Outstanding office tower. Prioritizing sustainability, the design retains over 50% of the existing structure and adopts a “fabric first” approach to minimize energy demand. Its folded terracotta façade reduces solar exposure while enhancing daylight access. The ground floor expands public space by 280%, offering 2000m² of community-accessible areas.

Our role was to inform the early façade design and touch base with the Architectural intent and the potentials and limitations of different façade alternatives. In more detail:

Discuss the different considered solar control mechanisms:
- (a) glass (type and size),
- (b) fixed external elements (side fins, awnings and louvers),
- (c) façade rotation towards north, and
- (d) movable shading.

Explain their potential benefit on Peak Solar Gains and suggest ways forward. Carefully thought out combination of these solar control mechanisms will allow us to maximize performance with minimum impact on design and occupant experience.

Map a number of solutions that meet the aforementioned set target: briefly discuss the pros and cons of each solution to be discussed with the design group.