If you are renovating, you should consider the green strategies suggested in this realestate.com post by Danielle King.  For example, add insulation to the roof and external walls and you could save 25% on energy costs.  Replace inefficient windows or add window film since up to 40% of your heating can be lost through windows in winter.

Energy efficient appliances, LED lighting and solar panels will also contribute savings, while protecting the environment. Implement water collection techniques to use rainwater for toilets and the garden.  Include water efficient faucets and showerheads. Add high-flow taps that make baths and washing machines fill quickly. Use low/no Voltatile Organic Compound (VOC) materials where possible, and non-toxic paints.to read more click here.