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A house price has gone through the roof because its planning permission has gone through the floor...
The £12 million semi-detached mews-style house is in London's exclusive Chelsea district, where properties with the potential to expand are at a premium.
Before the canny homeowner of the four bedroom Edwardian home put it on the market they gained planning consent to build two stories down into the basement.
The Royal Borough of Kensington and Chelsea Council has granted permission to excavate about 20ft beneath the house.