One Liverpool Street

Carbon and space savings in the City of London

A fully electric over-station commercial development that will form a bridge over London’s underground railway assets.

Scroll down
Close

One Liverpool Street Project summary

Client

Aviva Investors

Key partners

Eric Parry Architects, Robert Bird Group, Aecom, John F Hunt & William Hare Group

Services provided

Construct

Sectors

Commercial

Locations

UK - London and south-east England

Project timeline

Start Date
January 2023
Expected end date/completed
January 2026
Close

Project story

Set to be the second fully electric over-station development delivered by Mace for Aviva Investors in the City of London, alongside 101 Moorgate, One Liverpool Street will provide 176,000 sq. ft. of premium Grade A office and retail space across ten floors.

Located at the eastern entrance to the Elizabeth Line at Liverpool Street Station, the new ten-storey office block consists of mixed-use facilities which sit directly above underground railway infrastructure. A complex feat of engineering, the over-station development features 173 new piles and 4,192 tonnes of steel designed to bridge an abundance of underground assets and adjacent infrastructure.

To keep the ambitious construction programme on schedule, One Liverpool Street’s project team has developed a unique sequenced programme. Dividing works on the site in half, the steel frame is initially being erected on the south side, whilst simultaneously enabling works to proceed on the north, before completing the structure on the north site.

Fully electric in both construction and operation, One Liverpool Street has been designed to achieve significant energy savings throughout its lifespan, targeting the highest sustainability certification: BREEAM ‘Outstanding’.

One Liverpool Street east view
176,000 sq. ft. of office and retail space
100% electric in both construction and operation

points of note

Steeling the spotlight

The development sits above London Underground and Elizabeth line railway lines and wraps around a six-storey high crossrail ventilation shaft. To bridge all the existing infrastructure assets, the team constructed a complex steel structure featuring a series of nine 4.5m-deep trusses and 173 new piles that reach up to 43 metres deep into the existing foundation.

Low energy, high impact

The building will be 100 percent electric in both construction and operation, with air source heat pumps, triple glazing, high-efficiency chillers and energy-efficient lighting. With no gas boilers, it’s expected that the new building will save significant amounts of energy. It will also contain high performance HEPA filters, which will remove at least 99.97 percent of particles from the air. The building’s green roof will also enhance biodiversity in the neighbouring area, while also facilitating rainwater attenuation.

Engineering excellence

To ensure that the new building structure is not affected by vibrations from TfL’s live railway lines below, the solution incorporates a series of isolation bearings placed under every column and truss, stabilising the building’s structure and mitigating any risk from external movement or damage. Initially installed at depths of up to 43 metres underground, some of the existing foundations from previous structures have been re-used and incorporated into the support points for the new building.

explore more