Some useful websites for general sustainability and sustainable housing information:

Association for Environment Conscious Building - http://www.aecb.net/
Big Green Switch - http://www.biggreenswitch.co.uk/
Bioregional - http://www.bioregional.com/
Building Research Establishment - http://www.bre.co.uk/
The Building and Social Housing Foundation - http://www.bshf.org/home.cfm
Carbon Trust - http://www.carbontrust.co.uk
Centre for Alternative Technology - http://www.cat.org.uk/index.tmpl?refer=index&init=1
CIRIA - http://www.ciria.org.uk/
Combined Heat and Power - http://www.chpa.co.uk/
Community self build Scotland - http://www.selfbuild-scotland.org.uk/
Construction Industry Environmental Forum - http://www.cief.org.uk/
Communities and Local Government - http://www.communities.gov.uk/corporate/
Construction Resources - http://www.constructionresources.com/
Create Centre - http://www.create.org.uk/
Energy Efficiency Commitment - http://www.esd.co.uk/eec/
Energy Capital Allowance - http://www.eca.gov.uk/
English Partnerships - http://www.englishpartnerships.co.uk/
European Housing Ecology Network - http://ehen.com/site/index.php
Energy Saving Trust - http://www.energysavingtrust.org.uk/
Encraft - http://www.encraft.co.uk/ws/homepage/homepage.html
Forest stewardship council - http://www.fsc-uk.org/
Global Action Plan - http://www.globalactionplan.org.uk/
Greenmoves - http://www.greenmoves.com
Grown up Green - http://www.grownupgreen.org.uk/about/?PHPSESSID=3bcdc41f0c3f026605a9e62bbe91e58a
Hockerton Housing Project - http://www.hockertonhousingproject.org.uk/
Housing Corporation http://www.housingcorp.gov.uk/
Living Village - http://www.livingvillage.com/index.html
Low Carbon Buildings Programme - http://www.lowcarbonbuildings.org.uk/home/
Low Impact Living Initiative http://www.lowimpact.org/
National Energy Action - http://www.nea.org.uk/
National Energy Foundation - http://www.nef.org.uk/index.asp
National Resource and Waste Forum - http://www.nrwf.org.uk/
Neighbourhoods Green - http://www.neighbourhoodsgreen.org.uk/ng/
Permaculture Association http://www.permaculture.org.uk/
Recycled materials database - http://www.ecoconstruction.org/
Routes to Sustainability - http://www.routestosustainability.org.uk/
Sponge - http://www.spongenet.org/
Sustain World - http://www.sustainworld.com
Sustainable Development Commission - http://www.sd-commission.org.uk
Sustainable Development - http://www.sustainable-development.gov.uk/
Sustainable Refurbishment of Tower Blocks http://www.sustainingtowers.org/
Sustainable Tower Blocks Initiative - http://www.towerblocks.org.uk/
Sustainability Works - http://www.sustainabilityworks.org.uk/public/
Teen Bees - http://www.tenbees.co.uk
The Vale Housing Association - http://www.vale-housing.co.uk/whoarewe/environmental/index.html
Water Segal Self Build Trust - http://www.segalselfbuild.co.uk/home.html
Water Pollution - http://www.water-pollution.org.uk/
Waste Watch - http://www.wastewatch.org.uk/Homepage
WaterWise - http://www.waterwise.org.uk/
World Wildlife Foundation - http://www.wwf.org.uk/
ZedFactory - http://www.zedfactory.com