Two Fifty One

Published 23rd August 2022

As Europe’s tallest pre-cast building, Two Fifty One forms an integral part of the on-going regeneration of the Elephant & Castle area. The 0.51 acre mixed-use development provides a 41-storey residential tower in addition to 3,100 m² of modern office space and 280 m² of retail space.

The tower’s amenities include 24-hour concierge, Wi-Fi lounge, cinema club, health and spa club, entertaining space, cafes and bars, as well as fully glazed winter gardens.

We were appointed to provide structural, MEP, environmental and transportation consultancy services for the project. Utilising Laing O’Rourke’s Design for Manufacturing and Assembly (DfMA) system throughout, we helped to develop precast columns and lattice floor plank system. A two-storey basement was constructed using a secant wall solution formed below the existing single storey basement structure.

Our specialist teams also provided acoustic design and sustainability advice including guidance on the specification of various building elements, waste strategy and energy usage. A ‘state-of-the-art’, low energy heating system was provided by centralised gas condensing boilers as part of the overall design, serving the whole site with hydraulic interface units provided for the apartments. To help users reduce energy use, apartments are provided with an energy display to monitor energy use for heating, electricity and cooling. The energy strategy is based on off-site renewables with provision made for future connection to a Multi Utility Service Company, providing Low Temperature Hot Water (LTHW) heating, chilled water, green water and off-site electricity. The energy strategy is based on the provision of on-site photovoltaics which were installed as part of the base build.

Our environmental team supported the completion of a coordinated environmental and geotechnical ground investigation. Through analysis and assessment of the environmental data the design team were able to demonstrate that the site represented a low environmental liability to ensure successful approval by Southwark Council. Our specialists also provided acoustic design and sustainability advice including guidance on building elements, waste and energy usage as well as acoustic specification of all building elements and building services plant.

Client: ECA Development Ltd

Architect: Allies & Morrison