Quay Quarter Tower, Sydney, Australia | 2022

Architects: 3XN Lead
Lead Designer: Kim Herforth Nielsen
Landscape Architects: Aspect Studios
General Contractor: Multiplex
Client: AMP Capital
Photographers: Adam Mørk, Sara Vita, and Ethan Rohloff
3 XN Partner, Key Team, Design & Execution Phases: Fred Holt
3 XN Partner, Key Team, Design Phase: Jeanette Hansen, and Audun Opdal
Key Team, Design Phase: Louise Villumsen, Morten Norman Lund, Oskar Nordstrøm, Sebastian le Dantec Reinhardt, Torsten Wang, and Gry Kjaer
Key Team, Design & Execution Phases: Alyssa Murasaki Saltzgaber
Key Team, Execution Phase: Torsten Wang and Jeppe Kongstad Hjort
Design Team: Alvin Kung, Andrew Le, Carlos Ramos Seidenfaden, Henrik Rømer Kania, Jes Tønsgaard, Kasia Stachura, Mads Herskind Møller, Maria Tkacova, Martin Rejnholt Frederiksen, Morten Andersen, Olaf Kunert, Rasmus Møller, and Sam Sweeney
Associate Architects: BVN
Associate Architect Lead: Daniel Cruddace

Quay Quarter Tower (QQT), located close to Sydney Opera House, eschews the conventions of a traditional, uniform high-rise and instead is arranged as a vertical village to create a sense of community and provide spaces that focus on collaboration, health, and well-being. Quay Quarter Tower humanizes the high-rise. The 206-meter tower is comprised of five shifting volumes stacked on top of each other. Each volume is arranged around an atrium facing the iconic Sydney Harbour to the north.

The atria accommodate informal meeting and social spaces that encourage knowledge sharing and commingling to activate the workspace. The series of stacked atria create a social spine with exceptional views, while also allowing daylight deep into the 2,000-square-meter floor plates. At the base of each block, the atria open onto generous external terraces which extend the workplace and provide access to valuable external space throughout the tower.

The shifting northern façade responds to its context as the building ascends. The lower blocks face the active precinct of Young Street while also focusing views towards the Sydney Harbour Bridge. As the blocks rise, the façade rotates to the east to slip under the solar plane requirements and face the wider harbour views, including the Botanical Gardens and the iconic Sydney Opera House. A successful user-experience for any high-rise starts at the moment of arrival.

QQT’s podium provides street-level activity, whilst creating a dramatic arrival by showcasing the voluminous tower lobby. The podium’s visual and physical permeability activates the public domain and takes advantage of the favourable Sydney climate by extending the internal market hall tenancies to external terraces. Atop the two-level podium, a public park and rooftop cafe create a destination and much-needed green space in the revitalised precinct. Due to the severe site topography the roof garden can also be accessed directly from the ground level lobby.

The radical sustainability strategy for the building involved upcycling the existing tower, retaining 65% of the previous tower’s beams, columns, and slabs, and over 95% of its existing core, resulting in an embodied carbon saving 12,000 metric tons in concrete alone. Working within the solar envelope and other contextual constraints, the design adds approximately 45,000 square meters of new construction, primarily on the north side of the building by grafting on new floorplates to the existing slabs. The new structure optimises the structural grid span to increase views to the harbour.

The façade’s external sunshade hoods reduce the heat loads on the building by up to 30%, eliminating the need for internal blinds and reducing energy loads while optimising views to the world recognized Sydney Harbour and its icons. By upcycling an existing building into an exemplar of sustainability, QQT stands as a model for future construction, demonstrating that demolition need not be the favoured option for creating a world-class development that exceeds the expectations of the most discerning clients.