Princess Diana's former family home in an upscale district in London is now for sale.

Situated in the heart of Mayfair, the nearly 5,000-square-foot mansion, where Princess Diana's so-called "wicked" stepmother Countess Raine Spencer once lived, hit the market for the first time in 22 years and is listed for £10.95 million ($13.8 million).

According to a listing on the Chestertons website, the five-story Farm Street townhouse was built in the early 1980s.

The home boasts four large bedrooms, five bathrooms and three entertaining rooms.

Princess Diana
Princess of Wales Diana poses, 27 January 1988, during her visit to the Footscray Park in suburb of Melbourne.
(Photo : PATRICK RIVIERE/AFP via Getty Images)

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Photos of the residence provided in the listing showed that the bedrooms and entertaining rooms have plush carpets, while the bathrooms come with marble floors and tiles.

The home is also equipped with an elevator that goes up to all floors, staff accommodation and a "private garage in a secure underground car park," the listing said.

Residents have enough space for gatherings as the property has lower-ground and ground-floor patios, along with a third-floor, south-facing roof terrace.

Princess Diana's father, John Spencer, the 8th Earl Spencer, bought the townhouse in 1990, The U.S. Sun reported.

Princess Diana

(Photo : TORSTEN BLACKWOOD/AFP via Getty Images)

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Her stepmother -- who John married in 1976 after his 1969 divorce from Diana's mother, Frances Shand Kydd -- inherited it when the earl died in 1992.

Princess Diana allegedly had a frosty relationship with Raine after the latter married her father.

According to the outlet, King Charles' late ex-wife and her siblings reportedly dubbed the late countess "Acid Raine."

During Princess Diana's 1981 wedding to then-Prince Charles, Raine wasn't seated with John.

Raine, Countess Spencer, stepmother of Princess Diana, Princess of Wales
1984: Raine, Countess Spencer with a bouffant hair do. She is the step-mother of Diana, Princess of Wales and daughter of novelist Barbara Cartland.
(Photo : Hulton Archive/Getty Images)

The countess, who passed away in 2016, was also left out of the balcony appearance at Buckingham Palace following the ceremony.

Diana and her siblings allegedly booted Raine out of the main Spencer estate, Althorp House, after their father died, which led to her living in the Mayfair mansion.

The late princess and her stepmother's relationship later became the subject of a documentary, titled "Princess Diana's 'Wicked' Stepmother."

However, the pair's icy relationship reportedly eventually thawed when Raine supported Diana following her split from Charles.

According to Barrons, Princess Diana frequently visited the Mayfair home in the years before she died in a car crash in Paris in August 1997.

In 2000, Raine moved out of the townhouse, which was later acquired by the late art collectors Alan and Mary Hobart.

Princess Diana and Prince Charles
Prince Charles and the Princess of Wales (1961 - 1997, later Diana, Princess of Wales) at Westminster Abbey, London, for a centenary service for the Royal College Of Music, 28th February 1982.
(Photo : Fox Photos/Hulton Archive/Getty Images)