Bridge House
Grade II Heritage Building, New London bridge | Sustainable Retrofit to a Mixed-Use Commercial property
Client:
GMS Estates
Location:
London, UK
Completion Date:
2022
Capital Cost:
£10m
Sector:
Sub-Sector:
Overview
2023 BCO Awards Highly Commended in the Refurbished / Recycled category
Bridge House is a Grade II listed property with an 1800s retained stone façade at the front, and a recent concrete framed extension to the rear. The building is in a prime location between the south end of London Bridge and Southwark Cathedral, one of the oldest streets in London, dating back to Roman times. The Romans laid out this street as part of a route that connected London Bridge to Shooter's Hill, Dartford, Canterbury, and Dover. This retrofit project aimed to eliminate subpar modern extensions, introduce new office space, and harmonize the spatial layout that had evolved haphazardly over the years. As part of an extensive internal refit, the project included remodelling the entire roof to capitalise on the breathtaking panoramic views overlooking London City. The final footprint has created a workplace building refurbished to CAT A and part CAT B standards, with a new ground floor that revitalises public access and creates a valuable 'third space'. The project not only added 280m² of office space but also displays a best-in-class example of a sustainable restoration of a building's classical structure into a modern mixed-use commercial building.
Our Role
Ayesa undertook detailed design work to create a new steel grillage at the rear of the building. This was essential to prevent overloading of the existing roof slab that connects the steel frame to the glass box office and terrace above. Works to the front of the building included alterations to the existing stone façade and party wall, along with new floor structures to the 4th floor and roof, carbon fibre strengthening to existing floors, and alterations to the lift core and existing staircases. New glazing and repairs to the existing building fabric aimed to reduce thermal heat loss and high-efficiency plant and heat recovery systems have also been put in place to reduce the operational carbon. The project team improved the Montague Close passageway, reinstating a historic route through the site and improving access to Southwark Cathedral, office, and retail spaces. This also provides protected pedestrianised access as well as secure waste and cycle storage.
This project is a best-in-class example of a sensitive retrofit, that preserves historic fabric in a modern repurpose, yet limits carbon emissions with the use of less carbon-intensive materials throughout its construction.
Innovation and Value Add
Ayesa also implemented ingenious temporary works designs that enabled the construction of partial floor plates while allowing existing telecoms equipment to function. This strategic approach ensured that the project moved forward with minimal financial impact.
Photos courtesy: Emrys Architects