Developers say they want to turn the 77-acre site where Earls Court Exhibition Centre currently stands into a "new London district" by creating a High Street and 7,500 houses.
Earls Court was built in 1937 and is famous for hosting the Ideal Home Show and the Royal Tournament.
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The property developer painted the mews house in March last year after she was denied permission for a basement below the property.
Profits at the estate agent plummeted 42% in the first half of the year.
Ionut Gheorghe, 27, was detained in Los Molinos near Madrid on Friday by Spanish police under a European Arrest Warrant.