East Herts Council offer home insulation grants and information on loft and cavity wall insulation

How green is your home – Section of Green Our Herts with energy saving tips

The Passivhaus Trust is an independent, non-profit organisation that provides leadership in the UK for the adoption of the Passivhaus standard and methodology. Passivhaus is the leading international low energy, design standard

BREEAM is the world’s leading sustainability assessment method for masterplanning projects, infrastructure and buildings

Open Eco Homes run by Cambridge Carbon Footprint gives free advice from local householders with open days each year

Warm houses – where does the energy go and what you can do about it – (Leaflet from Cambridge Carbon Footprint)