3 Assembly Square

Scott Brownrigg, Cardiff, 2009


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Cardiff Waterside     Download Original

  • First floor plan    
  • Cardiff north east elevation    
  • Cardiff north west elevation    
  • Cardiff south east elevation    
  • Cardiff south west elevation    
  • Sections    
  • Sections    
  • Ground floor plan    

Office building located ajacent to the National Assembly for Wales' Senedd Building, forming part of the Cardiff Bay Waterside Estate

The 6,155m2, five-storey building delivers a flexible design and at the time of its completion was Wales’ largest eco-friendly speculative office development.

Client, Aviva Investors required a ‘statement building’ designed to be exemplar, in terms of architecture, sustainability and as a commercial office development.

The building, which features a biomass boiler, chilled beams and rainwater harvesting, achieved a BREEAM rating of ‘Excellent’ six months before practical completion, with a score of 75.52 and was commended in the BREEAM Awards Wales 2009.

The atrium features a sculpture by artist Claire Morgan called ‘Pressure Makes Diamonds’, which uses coal and iron to represent the industrial history of Cardiff Docks.


  • Begun: Nov 2007
  • Completed: Jun 2009
  • Floor area: 7,550m2
  • Sector: Office
  • Total cost: £12M
  • Funding: private
  • Tender date: Jul 2006
  • Procurement: Design and Build
  • CO2 Emissions: 38kg/m2/year
  • Address: Britannia Quay, Cardiff Bay, Cardiff, CF10 4PL, United Kingdom

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