Cliveden Estate in Berkshire, UK, is the place to go if one wishes to retire green.

Their website declares

The result of a creative partnership between Countryside Properties and the National Trust, the village echoes the seclusion and order of the historic estate, whose magnificent gardens and buildings lie at its doorstep. A haven of peace within easy reach of London, the framework for Cliveden Village has been dictated by the existing, abundant landscape, and in particular the surrounding, outstanding mature trees which have been carefully preserved.

The residences themselves are built from sustainable timber, recycled copper, and British stone. They are heated via south-orientation to maximize sunlight and through solar power. Wildlife corridors, recycled rainwater, high efficiency gas boilers, bike storage in every home and high efficiency shower heads, sinks and toilets round out the green initiatives in the village.

The village consists of 2 or 3 bedroom apartments, that range in price from £410,000 for an apartment to £560,000 for a house. To check it out for yourself, go to their website.

via the guardian