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Laurie Chetwood, the founder of Chetwood Associates, has unveiled these images of a proposed hilltop house in the Andes. The US$1 million (£580,000) family home in the Chilean rainforest has been designed to open up during the day and close at night to protect against the sub-zero mountain temperatures. Because of its remote location, the 1,000m 2 house, which has already won planning permission, will be entirely self-sufficient. The folding roof 'petals' will not only generate power - through a series of photovoltaic panels - but will also collect rain. The retreat, dreamed up for a local property developer, will have four bedrooms, a garage for six cars, an observatory and its own cave. Explaining the scheme, Chetwood said: 'This building fully utilises the available natural resources to create a workable home that sits lightly within its surroundings and impacts only minimally on the environment.' Work is expected to start on site in the new year and is due to complete in summer 2007.

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