30 Cannon Street.

London, UK

Alan Treacy, Partner at Hoare Lea

Project Lead:
Alan Treacy

Heritage space made modern-day ready.

30 Cannon Street is an architecturally unique building that was extensively refurbished to provide a modern and inspiring office space in the City of London.

Extensive enabling.

Our Operational Engineering team was appointed to provide consulting engineering duties for the project’s fifth-floor extension, the relocation of plant to the roof, and third-floor office layout fit-out works.

As the building had existing tenants, the entire refurbishment had to be accomplished while keeping all services fully operational during occupied hours.

In addition to this, we arranged and managed an extensive validation of existing building services, as there was a lack of original O&M documentation. We also undertook: enabling works to Stage C and then Stage D to completion, extensive survey works, boiler and hot-water-system replacement, dry-cooler heat-rejection installation, generator replacement, and switchgear alterations.

Seamless switchover.

The works we undertook allowed for a seamless switchover between old and new. The original plant footprint of 40 square-metres was reduced to 25 square-metres with the use of low-footprint, high-efficiency, modular condensing boilers. These new boilers required stainless steel flues to be installed from basement to roof level in an existing riser.

To ensure a successful and smooth process, we allowed for a two-week transition period between old and new heating plant, which allowed us to prove resilience and fine-tune the new system. It began operation just as intended.

Normally on large projects we would work with an external consultant, but because of our vast range of in-house expertise we could deliver a ‘turn-key’ design package.