
Unlocking structural capacity
Material circularity was fundamental to YY London’s design, seeing the refurbishment feature the extensive re-use of the building’s existing materials. Approximately 95% of the original steelwork was retained, 84% of the concrete slabs were re-used, and the building’s foundations were completely retained, including the marine piles driven into the dock. Posing a significant challenge to the redevelopment plans, these complex foundations were strengthened to support the added capacity required for the two new storeys. To deliver this, Waterman’s team reverse engineered the piles to maximise their load-bearing capacity, ensuring the foundations could handle the increased weight without compromising safety.

Delivering a Net Zero building
With sustainability a core theme, this Net Zero building is entirely electric. Eliminating reliance on fossil fuels, the design incorporates a wide range of smart-controlled energy-efficient systems, including air source heat pumps with demand-led ventilation, high efficiency lighting and PV array at roof level. This contributed to the project securing a BREEAM ‘Outstanding’ certification, together with Smartscore and WiredScore ‘Platinum’ ratings.
By retaining the original structure and reusing materials wherever possible, the project saved over 10,000 tonnes of CO2, equivalent to the emissions from 7,600 flights to Sydney or the planting of 51,300 trees. These efforts significantly reduced the building’s environmental footprint compared to a complete demolition and rebuild

Helping unlock the potential of 30 South Colonnade to deliver YY London has been an exceptional engineering experience for our team. The challenges of retaining the existing structure while increasing height and frame capacity required highly creative solutions, particularly with the marine pile foundation strengthening and reconfiguration of the building’s core. Collaboration was crucial for a successful outcome, and the project team pulled together to ensure the building met its sustainability goals whilst significantly adding to the building’s internal floor area. We’re incredibly proud of the result, which has seen the delivery of a modern, high-performance workspace, setting a new standard for sustainable office refurbishment, whilst also creating a new landmark for Canary Wharf.”
Richard Whitehead
Waterman’s Managing Director for Structures
Images © Tim Soar