Thinking about moving into a new home recently brought these guys to my attention again (click on logo for link). They have a number of link among their member list (based on region), including one for EnviroCentre which I find interesting.
EnviroCentre can help you get a government grant to conserve energy while making more your home comfortable and healthier to live in. Getting our advice really is the best thing to do because it will help ensure that your money is invested in the most cost-effective way to reduce your space heating and cooling bills. If you're building a new house, our New Home Service can help you make it as energy-efficient as an R-2000 house without paying the certification fees.
Something to bear in mind when the time comes.