Archetech Issue 45 2019 | Page 41

The new building was designed to maximise the letting area and also to attract potential buyers. As a result, JRA managed to increase the lettable space by 65% from the original building despite the new structure having fewer floors. Meanwhile, the vast landscaped roof garden crowning the building offers unobstructed views to the City of London, Canary Wharf and the River Thames. A SUSTAINABLE PLAN In 2013, Topland sold the site to international property developer HB Reavis, who in turn appointed JRA to develop a detailed user- focused design for the site and deliver the new building. Sustainability was very important for HB Reavis and after reviewing the plans the developer asked JRA to increase the area of the roof garden. Photovoltaic arrays which were to be installed on the roof were reduced in size, allowing JRA to increase the landscaped roof area by 30% to provide planting space for 9,000 plants from more than 55 native species. 2* listed Fishmonger’s Hall, which sits in front of it, and the Art Deco Adelaide House opposite. Planners were keen for the architects to use traditional materials. Rather than smaller handmade tiles, JRA chose a bespoke large- scale terracotta faience for the exterior. The colours mirror and complement those of the surrounding buildings. Agnieszka Szedzianis, associate at JRA, takes up the story: “It was important to think about creating a timeless design, as the whole design, planning and build process can take many years and we needed the building to still be viewed as modern and contemporary when it was completed. Back in 2011, it was very innovative to push for a roof garden. There was no example of that in the City of London, and the planners were very impressed.” A MODERN DESIGN IN A CONSERVATION AREA One of the key challenges was to create a modern building that worked contextually with the historically significant buildings that surround it. 33 Central is situated on a prominent site in the City of London at the northern approach to London Bridge. From the outset the building was conceived as a complementary backdrop to the Grade ONE OF THE KEY CHALLENGES WAS TO CREATE A MODERN BUILDING THAT WORKED CONTEXTUALLY WITH THE HISTORICALLY SIGNIFICANT BUILDINGS THAT SURROUND IT. To accommodate the roof garden, most of the building’s heating, ventilation, and air conditioning equipment and plant was relocated from the roof into the basement. A gigantic 12 storey watertight air shaft runs through the middle of the building into the basement to provide air intake. Internally the building is planned around a central core that echoes the shape of the site. The wide, clear floor plates are suitable for a variety of different occupiers making the building flexible, as well as maximising the internal floor area. A deep 18-metre wide area is ideal for trading floors, 15-metre deep areas are designed for meeting rooms and breakout spaces, and 12-metre spaces are perfect for individual offices. JRA also minimised the number of columns to maximise flexibility during internal fit out.