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🟩 GreenBricks Building of the Week 🟩 The JJ Mack Building

Next gen green


150m from Farringdon Station and the new Elizabeth line – Smithfield’s new home of work.


📍Location


🏢Building Details

  • 205,000 sq ft

  • 10 floors – office + ground floor retail

  • Completed September 2022


👷🏾‍♀️Developer & Contractor


✍️Architects & Engineers


🌱Sustainability

  • EPC A + 5-star NABERS + BREEAM Outstanding (design stage) = 1st UK building to achieve this

  • Connected to Citigen’s low carbon energy network = largest urban heating + cooling tri-generation plant in London’s Square Mile

  • Dynamic water management system linked to real-time weather data: adapts capacity in line with anticipated rainfall + recycles rainwater and greywater = consumers 70% less water

  • 3D ‘digital twin’ powered by data collected from sensors drives systems to adapt + provide optimal working environment

  • Embodied carbon = 816kg CO2e per m2 = 15% lower than the LETI current average design target


🥦 Wellbeing

  • Enhanced fresh air supply at 16L per person: sensors transmit real time monitoring data directly to BMS and building app

  • 3 terraces with extensive views across Smithfield Conservation Area

  • 885 sq m biodiverse green roof hosts various plants + 2 bee colonies

  • 426 bike storage spaces + 2 bike repair stations = 1 cycle space per 5 occupants (60% improvement on GLA guidance)

  • Parcel concierge: dry-cleaning service + parcel pick up and drop off lockers for occupiers


🎈Bonus feature

The building takes its name from a prominent grocer – J.J. Mack & Sons – historically located on site and destroyed by a V2 rocket strike in 1945. Mack was a market trader whose career started with a humble street barrow and grew to the impressive corner fronting store – photographed here.





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