And the winner is...
Arup/Beddington Zero (fossil)

Energy Development (BedZED)

Arup's commitment to environmental and sustainability issues is demonstrated by its fundamental and extensive involvement in BedZED. This is a mixed development of 82 homes and around 3000 m2 of commercial workspace on a brownfield site in South London. BedZED has many environmental goals, including: zero net carbon emissions; zero fossil fuel and 100% renewable energy use; zero heating homes.

Measurable environmental achievements in a domestic environment

What the judges said...

The runners up

Powerminster
Powerminster is a specialist in the community heating combined heat and power field. Community heating has been recognised as meeting a number of key government objectives including: reduction of C02 emissions; easing fuel poverty; lowering use of fossil fuel. Hoare Lea Consulting Engineers
This consultancy's work on Plymouth College demonstrates that sustainable buildings are not the preserve of owner occupiers with large budgets. The College uses several sustainable techniques such as a high mass wall; use of north light; natural ventilation and night-time cooling. The building cost is well within budget, and is a repeatable project. Building Design Partnership
Fingal County Council set out to procure a new headquarters, and specified that the building design should demonstrate low energy usage and be responsive to the environment. BDP designed a building that minimises reliance on artificial/mechanical means of achieving required levels of heating, cooling, ventilation and lighting. Max Fordham LLP
The Almeida Theatre project is based in the heart of King's Cross. It involved converting a derelict bus garage into a theatre with two auditoria, stage, workshop and public bars. The leaking roof was covered with a mat of sedum succulent plants over a moistened underlayer. The mat is recyclable and will be reused. Ventilation design included acoustic engineering for silent air delivery. Heating is delivered only where and when it is needed to avoid waste.