Green building in the United Kingdom
The Association for Environment Conscious Building (AECB) has promoted sustainable building in the UK since 1989.
The UK Building Regulations set requirements for insulation levels and other aspects of sustainability in building construction.
In Wales, advice on and access to sustainable building is available from a not-for-profit organisation called Rounded Developments Enterprises. They run a Sustainable Building Centre in Cardiff.
One of the best known green buildings in the UK is the Media Centres' Friendly Street Building.
Under the Energy Performance of Building Directive (EPBD) Europe has made a mandatory energy certification since 4 January 2009. A mandatory certificate called the Building Energy Rating system (BER) and a certification Energy Performance Certificate is needed by all buildings that measure more than 1000 Sq mts in all the European nations. According to the UK Green Building Council, existing buildings account for 17% of the UK's total carbon emissions.