Planning Portal - http://www.planningportal.gov.uk/planning/
 
Building Regulations - http://www.planningportal.gov.uk/buildingregulations/
 
Energy Saving Trust - http://www.energysavingtrust.org.uk/
 
The Carbon Trust - http://www.carbontrust.co.uk/
 
Zero Carbon Hub - http://www.zerocarbonhub.org/