A rare development opportunity exists on the prestigious Bishops Avenue, also known as "Billionaire's Row", with approved planning permission to replace the existing residence with a grand mansion of approximately 15,000 square feet. The property, known as Avenue House, has been owned since 1971 and offers flexibility, with no deadline to commence construction. The site, situated on a 1/3 acre plot, presents an extraordinary chance to own a piece of one of London's most coveted locations, with professional builders estimating construction costs at around £300 per square foot. The potential for the property is immense, with projections suggesting that once constructed, the mansion could be valued at a minimum of £1300 per square foot, making it a significant investment opportunity. The new build super mansion, designed by Charlton Brown Architects, will feature 8 bedrooms, 7 bathrooms, 5 receptions, an indoor swimming pool, a gym, a cinema, a sauna, staff accommodation, and underground parking.