1 James Street, London, United Kingdom

Ecological features

Case london street london uk

Ecological features

This is Redevco UK’s first green wall and roof. In addition to the ecological benefits it is a physical symbol of sustainability and greening of the UK portfolio and had been popular in the UK office. This was the largest single cost item at £27,500 however it was also the greatest single contributor to the improved score giving an additional 4.7%.

London james streek green wall rotated


  • The second largest cost item was the replacement of all common parts lighting with LED’s. We expect an annual energy saving of £5,900, 42,200 kWh and 21,966 kg of CO2.
  • The payback period is five years, however some of the savings will benefit our tenants.
  • Other improvements to the energy score include the calculation of energy efficiency ratings for boilers, chillers and supplying additional evidence around HVAC system.
  • The energy score increased by 4.5%


  • This is the UK’s first significant BREEAM improvement project.
  • This asset achieved a BREEAM In-Use Very Good Rating, the highest achieved so far for Redevco UK.
0083 case study tabel london London james streek green roof

Key measures

  • Ecological features green wall & roofs +4.7%
  • LED lights and HVAC efficiency calculations + 4.5
  • Natural hazards assessment and plan +2.7%
  • Lighting level testing of tenanted areas +2.1%
  • Connect fire and intruder alarms to a monitored facility +1.3%
  • Install Glare control features + 0.5%
  • Various other assessments and additional evidence submitted +3.1%


  • Start planning early: The green wall took five months and six different contractors/consultants.
  • Get an up to date Gap Analysis: BRE update their criteria regularly and so our 2014 Action Plan was not reliable to estimate costs and improvements.
  • Water: It would be good to have included improvements and gain credits for water conservation.
Icon highlights


  • Improvement from Pass [39%] to Very Good [58%].
  • Fully occupied building with no re-development.
  • First significant BREEAM project for Redevco UK.
  • Capex cost of £70,000 (EUR 82,000).
  • Installation of a Green Wall and Green Roofs.
  • LED Lighting installed.
  • Various reports and assessments.
Icon location


1 James Street
United Kingdom

Icon tenant


GAP and four office tenants