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 louvres),
- (c) façade rotation towards north, and
- (d) movable shading.

Explain their potential benefit on Peak Solar Gains and suggest ways forward. A carefully thought-out combination of these solar control mechanisms will allow us to maximise 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.