A 1920s terraced house in Birmingham has become one of the oldest houses in the UK to gain a top "eco-homes" rating.
While the Government has pledged to make all new build houses zero carbon by 2016, the Bournville Village Trust has refurbished one of its properties in Bournville with solar panels, underfloor heating powered by a ground source heat pump, low energy light-bulbs and even a "green roof".
Roger Cadbury, trustee of the Bournville Village Trust, said: "It is just as important for older existing housing stock to be as well maintained and energy efficient as new build. It is up to all of us to reduce our carbon footprint."
Some of the features of the small three-bedroom terrace family home are to be expected: LED and low energy lighting and double glazing are now adopted as standard by the housing association in its refurbishment programme.
But the 1929-built house has also given the Bournville Village Trust's "green team" a chance to try out some less widely adopted ideas.
The heating and hot water supply are generated by a combination of solar panels and a ground source pump which draws heat from 65 metres underground.
Light wells into the kitchen - where the cupboards are made of recycled wood - bring in extra daylight and all the appliances in the kitchen have a A-grade efficiency rating. All the walls and roof are insulated. Even the paint is water, rather than oil-based, and the downstairs rooms are tiled to allow the underfloor heating to work more effectively.
In the garden, bricks recycled from a wall taken down in the house, have formed the patio, while a pond, bird boxes and even the plants encourage wildlife. The fences are made from recycled plastic, which is manufactured to look similar to wood.
There's green roof over the kitchen extension, planted with low-growing sedum which supports insect life and limits run-off, as well as water butts and composting and recycling bins.
The house will be officially opened today by conservationist David Bellamy and will then be open to the public until December, before being let.