Done properly, not only are there huge running cost savings to be made from an eco build, but also an element of future proofing when it comes to current and proposed government regulations and marketability, if and when you come to sell.
For many though, providing a family-safe, non-toxic home and reducing the environmental impact while still enjoying the comforts of modern living remains the main motivation.
It doesn't mean you have to build with straw bales or rammed earth, though these are options; most successful eco builds are very conventional in appearance. But it is much more than just choosing environmentally friendly materials and paint..
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Insulation, throughout the house; make sure it is not compromised too by building construction, eg the accidental creation of 'thermal bridges' allowing heat to travel out; design should also include airtightness and ventilation.
Water: conserve and minimise use of water. The average person uses 140 litres per day but should aim to reduce this.
Energy: includes using natural materials such as wood for burning to heat water while renewable energy systems including wind turbines and solar panels.
Lighting: should maximize the use of natural light, while energy efficient lighting is used throughout
Electrical appliances: eliminating the need for some eg providing a clothes natural drying space, while ensuring A++ energy efficient standard for others
Materials: consider those which are natural and from a renewable source; use locally grown timber or that accredited by the Forestry Stewardship Council (ensuring you support responsible forest management worldwide); also more durable wood such as heartwood of English oak reduces the need for preservatives. Look at the energy involved in production/transportation, and use manufacturers which can provide such information. Avoid PVC
