199 Bishopsgate, London, is a 12 storey steel framed office block originally constructed in 1989 forming part of the British Land Broadgate Estate.

It was recently refurbished in 2011/2012 to provide 146,000 sq ft of high quality space, transforming the building’s interior and upgrading its energy performance, reducing carbon emissions by 60%. On completion the refurbishment achieved a BREEAM Excellent rating.

The building includes a two storey partial basement, with the superstructure bridging over the railway lines into Liverpool Street Station. The braced steel frame structure includes a composite slab on metal decking supported by long-span lightweight floor trusses.

The building houses plant/storage space in the basement, retail/reception at ground floor level and office space on upper floors.
The 2011/2012 refurbishment included:

• Building Services enhancements, names:
  • Energy efficient chillers
  • Replacement of air handling units on each floor with centralised units to maximise heat recovery
  • High performance glazing on the top two floors
  • Replacing fan coil units on each floor with high-efficiency, variable speed motors
  • Centralised rooftop plant and relocating chillers to roof level
  • Energy efficient, dimmable lighting with motion sensors and daylight linking
  • Automated meter reading system for energy and water, with sophisticated sub-metering
• Recycling facilities for occupiers
• 50 cycle spaces, showers and lockers to support green travel
• Brown roof space to encourage biodiversity
• Reconfiguration of office floor plates and cores to improve the layout, efficiency and flexibility
• Relocating the entrance away from the pedestrian crossing area, to improve pedestrian flow
• Provision of a modern, a double-height reception
• Enhancing retail space on the ground floor
• Improving disabled access and facilities
• Enclosing the centralised roof plant and introducing acoustic louvers, to avoid any impact on strategic views from King Henry VIII’s Mound towards St Paul’s.

Structural alteration works include extension of the basement mezzanine slab, partial removal of the ground floor mezzanine to form a double height space and re-assessment for double-height columns, formation of new services risers and openings for stair voids, and inclusion of an additional mezzanine floor to the top floor.