Consulting Engineers
and Environmental Scientists

A new five-storey over-basement office, accessed from Bell’s Lane, was constructed in the rear yard space of the Georgian buildings. The design for this new space is modern and contemporary and it connects to the Georgian buildings at each level via a link bridge. The Grade A office building features an open-plan layout and occupies the full footprint of the available site, which presented construction challenges due to the very constrained site access. Overcoming these challenges required close coordination between our design and construction methodology.

To facilitate basement excavation and minimise the risk of undermining surrounding properties, a secant pile wall was installed around the site’s perimeter. Piles were also installed in the basement footprint to support column loads from the building. A reinforced concrete column and flat slab solution was adopted for the building’s superstructure. This was designed with a void in the centre of the building to accommodate the project’s tower crane, which was later infilled at the end of the construction following dismantling of the crane. The high-quality concrete finishes offer prospective tenants the option of leaving structural walls, columns, and ceiling slabs exposed as part of their fit-out.

We provided full civil and structural engineering services, including conservation engineering, working closely with Shaffrey Architects on the restoration of the Georgian buildings and we worked with Plus Architecture on the design of the new office, on behalf of Green Sea Property. The result of the project is a high-quality mixed-use development providing office, restaurant and cultural space in the heart of the city, while restoring and enhancing the historic fabric of Hume Street.