The restoration of a billionaire’s rundown country estate in Wiltshire has moved a step closer.

New details on the revamp of Tottenham House - The Earl of Cardigan’s ancestral home now owned by billionaire hedge fund manager Chris Rokos - have been put to Wiltshire Council for consideration.    

The way rooms will be lit, heated, ventilated, where water pipes and plugs will go and all the details needed to pull off the massive renovation have been mapped out.

The former owner of Tottenham House, the Earl of Cardigan David Brudenell-Bruce, 70, sold the mansion in 2014 to a developer for £11.25m after a battle against the estates trustees to keep his ancestral home.

The a 100-room mansion in the 4,500-acre Savernake Estate had been in the family for nearly 200 years when it was sold.

It was later bought by Mr Rokos and has been unoccupied since 2005.

The renovation plan to turn the Grade I listed house back into a single-family home was approved in 2018.

The Old Stables, the Octagonal Pavilion and other outbuildings and garden walls will also be transformed under the proposals.  

The latest update being considered by Wiltshire Council is 263 documents which describe the building work details of the revamp.

Previous plans to turn the house into a golf club were submitted to Wiltshire Council but never moved beyond the planning stages.

The new aim is to turn the house into a home fit for 21st century living - and the new house will need 69 staff and have running costs equivalent to a medium-sized hotel.

In 2021, the Sunday Times Rich List estimated that Mr Rokos is worth £1.25bn.

Mr Rokos has bought other mansions such as Mawley Hall in Shropshire which he bought in 2018 for £10m according to the BBC.

The plans say: "As with many great houses in the 20th century, two World Wars, capital taxation, financial upheaval and occupation by the military, all made Tottenham House unsustainable as a single private residence; an alternative use had to be found."

The house was occupied by the leading preparatory school Hawtreys.

Whilst Hawtreys was there, the condition of the house stabilised, but the gardens and estate declined considerably, according to the application.

After Hawtreys’ departure in 1994 parts of the house were occupied by the Amber Trust, a charity that offers blind children music lessons.