The super prime property market has been sluggish

On Bishops Avenue, it is quiet. On a recent weekend walk down the mile-long parade of luxury mansions, not a single other person could be spotted strolling along the pavement.

The property market for Bishops Avenue, known locally as ‘Billionaire’s Row’, is equally quiet.

Aside from one high-end house snapped up by a Nigerian banking exec , next to no homes have changed hands so far this year, in a neighbourhood famed for its celebrity residents, including the likes of singers Justin Bieber and Ariana Grande, Indian industrialist Lakshmi Mittal and the Sultan of Brunei.

Amid the tranquillity, though, is the faint sound of building work. At number 54, what was once a huge family home sold for £18m in 2018 is being repurposed into three-

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