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The Horizon House development in Bristol is setting new standards in sustainable construction.

  • Thumbnail of Horizon House
  • Thumbnail of Horizon House
  • Thumbnail of Horizon House
  • Thumbnail of Horizon House
  • Thumbnail of Horizon House
  • Thumbnail of Horizon House
Image of Horizon House

General Information

Occupying a prime spot in Bristol’s civic quarter, the redevelopment of Horizon House is one of the city’s key regeneration projects.

The scheme comprises a 6,600m2 corporate office for the Environment Agency, 78 apartments in two central residential blocks and a 2,500m2 speculative office block.

Spaces for more than 330 cars and over 125 bicycles are provided within a two-level basement car park and an improved external car park.

Fast facts

Westmark Developments
2009 - 2010
Wales & West

To avoid potential problems between the interfaces of the proposed mix of materials within the Horizon House atrium, we proposed an alternative curtain window system which improved performance and delivered both programme and cost savings.

More than 85% of the building demolished to make way for the development was recycled on site, while the rest of the materials were taken away to be used in other developments.

Sustainable features include natural ventilation, rainwater harvesting systems, waterless urinals, intelligent lighting, water metering and meadow grass roofs to external terraces. On-site renewable energy sources include a ground source heat pump, 100m2 of photovoltaic cells and a solar hot water system.

Responsibly sourced materials were selected where possible, many with a high recycled content, while travel distances and the sustainable policies of suppliers and manufacturers were also taken into account.

“I can not emphasise enough how delighted I am with the Sir Robert McAlpine team who have worked diligently over the past two years on this project. It has been a pleasure to work alongside them and you can be very proud of this thoroughly professional team.” Stuart Kotchie, Environment Agency Programme Manager

Horizon House, the Environment Agency’s new Bristol corporate office, was named among the best of the best sustainable buildings in the UK, winning the BREEAM Offices Award 2010.

The five-storey building also achieved the highest score ever awarded by the Building Research Establishment (BRE) for its environmental credentials.

Horizon House was given a score of 85.06 per cent under BREEAM Office 2006, the most widely used environmental assessment method for buildings. The building received a 100% score for three of the eight categories on which the ratings are calculated: Management, Transport and Water.