33 Charterhouse Street
Project at a glance
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SectorCommercial
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LocationLondon
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ClientHelical
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Main ContractorMace
Reimagining smart buildings for sustainable cities
Located in the heart of Farringdon, the JJ Mack Building is a standout example of how intelligent engineering can redefine commercial spaces in historic urban settings. Developed by Helical and delivered in partnership with Mace, this 200,000 sq ft, 10-storey office building sets a new benchmark for smart, sustainable design.
SES was appointed to deliver the full MEP package, integrating advanced digital systems, offsite manufacturing, and sustainability-led engineering to create a future-ready workspace that prioritises occupant wellbeing, operational efficiency, and environmental performance
Technical highlights:
The JJ Mack Building was designed as one of Farringdon’s first smart buildings, with all services connected via a single ICT backbone. This unified infrastructure enables seamless communication between energy management, lighting control, and access systems, driving performance and efficiency across the board.
To enhance occupant experience, IoT sensors monitor air quality and occupancy levels, while a tenant engagement app allows users to access the building securely, control their local environment, and understand their impact on energy use and carbon emissions.
A digital twin platform continuously monitors building systems, enabling predictive maintenance and optimised performance. This not only reduces operating costs but also supports Helical’s ambition for net zero carbon operation by 2025.
Sustainability was embedded from the outset. The JJ Mack Building was the UK’s first to be assessed as BREEAM Outstanding at design stage and is on track to achieve a NABERS 5* energy rating. The smart building platform also achieved WiredScore Platinum, reflecting its resilience, connectivity, and digital readiness.
SES’s offsite manufacturing expertise played a pivotal role in the project’s success. Over 20,000 on-site labour hours were saved through the use of prefabricated modules, including the largest and most complex riser assemblies ever produced by our Prism facility. Extensive 4D planning ensured smooth logistics and installation, maximising efficiency and minimising risk.
