Despite warnings of further falls in house prices, Simon Cowell has proved that he has the X factor by selling his £15 million London mansion for its asking price.

The six-bedroom Georgian house in Holland Park, one of the capital’s most exclusive areas, was marketed by Fine & Country’s Kensington branch.

The brochure, seen by The Times, lists the asking price as £15 million, well below the £45 million claimed by some outlets. The sale completed on August 6. A representative for Cowell declined to comment.

The buyer is thought to be an Indian businessman who took out a £5.5 million loan from Cohort Capital, a London-based real estate lender, which confirmed that Cowell got the £15 million he was asking for.

Matt Thame, Cohort’s founder, said the deal was completed in less than a week, adding: “Given the turbulent market conditions, time is of the essence more than ever in the luxury real estate sector.”

The marketing brochure, sent to high net worth individuals on Fine & Country’s books, says the house, built in the 1850s, was once the home of the French ambassador to the UK. Cowell had owned it for the past 16 years.

The four-storey house is listed as having an area of 5,800 sq ft, with potential to extend into the basement and add 2,500 sq ft. The average British home measures about 1,000 sq ft.

Simon Cowell leaving the house in Holland Park with his friend Jackie St Clair in 2011

STEPHANIE SCHAERER/DAILY MAIL/SHUTTERSTOCK

There was an alleged plot to burgle Cowell’s home in June, which was uncovered by The Sun. It had been suggested he was selling up because that incident, which followed another break-in in 2015, had left him living in “constant fear”. However, people close to him suggested that was not the case.

Cowell, with his fiancée Lauren Silverman, bought a house in Oxfordshire last year, which is thought will now serve as his UK base. He is currently in the US filming the latest season of America’s Got Talent.

Cowell started his career as a record company executive and counted Robson Green, among others, as his clients. He then found fame as a judge on Pop Idol, the ITV singing show, in 2001. He is now best known as a judge on The X Factor and Britain’s Got Talent, both of which he founded.

That he was able to get the full asking price for such an expensive property reflects the buoyancy of the top end of the London market. Recent data from Savills shows that prices of £5 million-plus properties in the capital are flat year-on-year, holding up better than the wider market.