Zero Carbon London
→ Meet RIBA 2030 and LETI 2020 carbon targets, assumed over a 60 year lifespan
→ 89.6 kwh/m2/year operational energy well within the RIBA 2025 target
→ Whole life cycle net zero assessment and carbon offset strategy
Chart Street is a redevelopment of an existing 1930s masonry warehouse located in Hackney. Designed by Ian Chalk architects in collaboration with engineers Heyne Tillett Steel, the building has been remodelled into a sustainable and collaborative workplace. Demonstrating a commitment to retrofit and reuse, once complete, the building will provide expanded studio space for Heyne Tillett Steel’s 130-strong practice. Conceived as a creative working hub, the building reflects the practice’s approach to low-carbon structural design.
The building has been remodelled into a sustainable and collaborative workplace. The approach to the development is inherently sustainable and seeks to reuse as much of the existing building fabric as possible. To increase the building area and provide new roof and side extensions, structural timber has been used as a structural and aesthetic element. Acting as a natural carbon store and allowing for an efficient construction process, the use of timber has significantly reduced the carbon cost of the project.
The existing four-storey building has been redeveloped to include a new side extension, a new storey on the roof and a new circulation core. A central staircase has also been installed to improve internal circulation. The new extensions have predominantly been built in CLT and engineered timber. Due to their lightweight material qualities no additional strengthening to the existing structure was required, helping to drive down carbon emissions.
The new roof extension has been designed with a sawtooth Northlight which will help to reduce solar gain. Formed from CLT panels and high-strength BalBuche LVL beams, the extension will create extended open plan office space for presentations and collective activity. The heating and ventilation system will be electric-powered, and each floor will feature openable windows to allow for natural heating and cooling.