Holbein Gardens located between 1 Sloane Gardens and Tarnbrook Court in London’s Royal Borough of Kensington and Chelsea, U.K., originally dates back to the 1980s and will be repurposed to provide high quality, flexible and sustainable workspace in the heart of London. Alongside the restoration of the existing four stories, there will be an extension to the top of the property with an additional fifth floor and roof terrace, bringing the size of the project to 25,000 square feet.
The project will become one of the city’s most sustainable office buildings, achieving net zero carbon in line with U.K. Green Building Council’s Net Zero Carbon Buildings Framework, leading as an example of how the drive to net zero carbon can be achieved while maintaining a beautiful space.
Our team were originally involved in overseeing the strip out of the building before being appointed as mechanical/electrical/public health, vertical transportation and energy consultants. We are also involved in ensuring that the project is smart building enabled.
Clean and Renewable
Our expert team of energy and sustainability engineers were instrumental in ensuring that this building was able to achieve BREEAM Outstanding, WELL Gold and Wired Score Gold certifications, with aspirations for Platinum. The scheme is also a NABERS pioneer project. The development aims towards a net zero by 2030 target, with 99.95% of strip out waste having been diverted from landfill and 98% of the full scheme.
The all-electric building maximises heat pump technology, lending itself to decarbonization while also being beneficial for local air quality, minimising air pollution.
Biodiversity is at the heart of this project and a range of innovative materials and technologies have been used to have the greatest positive impact. Cross laminated timber has been used in the extension, as an alternative to other materials, helping to reduce carbon emissions and restoration of forest, alongside reclaimed steel work. New low embodied carbon products are also being trialled in the building, such as Thermalite aircrete blockwork and reclaimed access flooring.
Biodiversity and Ecological Resiliency
Holbein Gardens has incorporated the use of biophilia and greening to ensure the biodiversity and resiliency of the site, while also positively contributing to the environment of the surrounding area, Belgravia.
Giving Façade Purpose
Another sustainable practice that has been adopted for the project, has been to retain existing materials, rejuvenating the building and keeping it sustainable. The building’s retention and repurposing of its façade has ensured that the project will save 39% of embodied carbon compared to that of all new products.
A new roof terrace will also make an addition to the existing exterior, providing tenants with views of the surrounding Royal Borough of Kensington and Chelsea to the west and Westminster to the east. To optimise usable space on the roof terrace, our engineers maximised the use of basement plant and space planned roof-mounted plant including photovoltaic panels.
Our team has interfaced new windows with a roof-mounted weather station via the building management system to facilitate natural ventilation. Local displays will indicate optimal environmental conditions for office workers to open the windows, as well as to reduce electricity consumption through reduced reliance on mechanical systems which turn off to minimise energy consumption, all contributing to our client’s sustainability goals.