Clifton + Holywell, London


New-build 80,000 sqft commercial building to achieve a best-in-class office space and support spaces in the heart of Shoreditch. The project is set to achieve a number of sustainability accreditations including:

  • UGGBC 2050 Operation Energy Targets, Both Regulated and Unregulated (ie Paris Proof)
  • LETI Stretch targets for Offices (U-Values)
  • RIBA Climate Challenge 2030 for Embodied Carbon
  • WELL v2 Platinum
  • BREEAM Outstanding
  • NABERS 5* min
  • Latest workplace designs maximising flexibility and attraction to be in the work-environment
  • Extensive thermal modelling of façade options to minimise cooling and maximise daylighting
  • Extensive HVAC solution modelling to minimise energy


The project includes the creation of a new part-basement to house end of journey facilities, a ground floor retail space (restaurant), large atrium reception and 6 floors of prime commercial CAT A office space. Due to planning restrictions the roof mounted plant area was constrained and it took some novel approaches to services distribution. A tight core design ensured an efficient approach to the vertical services distribution whilst minimising the impact on NIA.


A detailed options analysis was undertaken to evaluate and decide on the most appropriate on-floor services given the Client’s desire to have clear ceilings. Full Design for Performance (DfP) modelling was undertaken on each option to assess the resultant operational energy of each option. Due to the constraints of the building, the requirement for clear ceiling voids and to maximise the flexibility of the space, a fan-tiled floor displacement system with perimeter heating and cooling was decided.


The building was designed with whole-life carbon at the forefront which resulted in a concrete frame with timber infill panels to provide a low embodied carbon approach whilst ensuring the mass of the building could be constructed. All mechanical plant is designed to be low refrigerant volume to avoid the extensive use of refrigerant gases and also to minimise the up from embodied carbon.”

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