100 Liverpool Street

London, UK

The 100 Liverpool Street scheme has become a net zero carbon building, adding to its credentials as one of the most sustainable office projects in the UK.

The project involved the refurbishment, extension and enhancement of 65,000m2 of existing office space that responds to modern occupier demands. The refurbished building, located in the City of London, is multi-tenanted with retail space located at ground and lower basement levels. The scope for this project includes a new façade, additional floors, complete replacement of the lifts and building services, re-planning of the current cores and infill of atriums to create additional net area.

British Land, one of our longest-standing clients, announced it has now off-set the residual embodied carbon from the project, which follows the award of a ‘BREEAM outstanding’ certification - a sustainability rating placing it in the top 1% of the UK’s office buildings.

We provided MEP, environmental and fire engineering solutions for the scheme and take great pride in having been part of the project team that helped create the first net zero building in British Land’s portfolio.

On appointment, we began by carrying-out extensive site analysis, daylight modelling and fire simulations. Early intervention from our in-house Technical Advisory Group shaped the project, while inventive engineering solutions across, MEP, environmental and fire services, combined to offer significant savings in programme and cost.

Because of the complexity of working on the site with so many stakeholders – including Network Rail, Crossrail and TfL – our MEP team also helped devise a strategy for networking distribution between the office levels and basement.

A major point for the project was getting the ‘top-down’ MEP strategy agreed, with all the plant placed on the roof. By solving the logistical problems of craning and maintaining equipment on the roof, we allowed the retail space at ground level to be maximised – increasing further the viability of the scheme.

The smart enabled building, with all the infrastructure and building management system in place, has allowed tenants to take advantage of the latest technology with scope for further upgrades in the future.

The scheme achieved BREEAM Outstanding, with the necessary reduction in CO2 emissions met by the efficient thermal envelope design and building services equipment efficiencies. The roof houses an array of PV, reducing the carbon footprint further, while a ‘grey’ and rain-water system was used with extra filtration on the air conditioning system.


London, UK


Commercial Development


65,000 m2

Our Role

MEP Consultant/ Environmental Consultant/ Fire Consultant


Close proximity to Liverpool Street Station (complex underground infrastructure)


Additional floors to existing structure


Linking of two buildings


Retail units incorporated


British Land & GIC


Hopkins Architects

Project Manager


Cost Consultant


Main Contractor

Sir Robert McAlpine

100 Liverpool Street

"It has been a fantastic project to work on with a great team and with genuine collaboration between everyone involved, we are proud to be part of this project as it moves forward.”

Neil Bradley, Board Director