Renters with only the deepest pockets will be getting the keys to what is believed to be the most expensive ever rental home marketed in the UK.

The four-bedroom, six-bathroom, Grade II listed townhouse at 50 Upper Brook Street in Mayfair is on the London House website to rent at a jaw-dropping £45,000 a week, or to buy for £50 million. Tenants would write out their monthly cheque to landlord, the Grosvenor Estate, which is owned by the Duke of Westminster.

Recently refurbished and styled by interior designers Bergman Interiors, the central London Edwardian home was built by the contractors Matthews, Rogers and Company in 1907 to replace a previous property from 1730. Its many previous aristocratic occupants include Lady Aston, Francis Eyre, the 6th Earl of Newburgh, and Sir Arthur Stanley MP, son of the 16th Earl of Derby.

The luxe property includes a formal drawing room for entertaining and his and her dressing rooms along with a large en-suite bathroom in the main bedroom. The fourth floor boasts a bespoke bar/games room and cinema room, leading to a roof terrace with views across London.

Wine cellar

There’s an impressive wine cellar, bar and gymnasium, black stone swimming pool with jacuzzi and steam room downstairs, while staff quarters house two bedrooms, separate kitchen and valet waiting area.

Callum Burgess (pictured), MD at Landlord Property Compliance, recently conducted an Electrical Installation Condition Report at the property which he says is believed to be the most expensive Assured Shorthold Tenancy in the UK.

“The installation had a 200amp Three-Phase Incoming Supply, BMS Panels, Control4/Lutron smart systems, and three boiler systems,” he writes on LinkedIn. “Needless to say, we needed slightly more than our 60-minute window to complete this one.”

Pictures: Google Streetview/London House