Extraordinary Extensions viewers criticized a property tycoon for his ‘obscene, two-storey megabasement built under his historic Knightsbridge house. 

London developer Kam Babaee bought Amberwood House, the former home of renowned ballerina Dame Margot Fonteyn, for £22 million, but said it was not suited modern way of life spent an extra £28 million renovating the house, including spending £11 million on the sprawling basement. 

The house, at  at 17A Thurloe Place, was originally built in the 1928 and was the Panamanian embassy between the early 1930s and late 1990s, where Margot resided with her ambassador husband Dr Roberto Emilio Arias. 

It is now being transformed into an ultra-luxury property that Kam calls a “seven-star hotel”. The property has a sauna, steam area, swimming pool, gym and living space in the basement. Work is still underway but he hopes to sell the property for £75million once it is complete.

The work was not appreciated by viewers who felt it had damaged the historic property’s integrity. One user tweeted: “Obscene amounts, obscene design and not even one token nod to environmental concerns. Disgusting.

London developer Kam Babaee bought Amberwood House, the former home of renowned ballerina Dame Margot Fonteyn, for £22 million, but said it was not suited modern way of life spent an extra £28 million renovating the house, including spending £11 million on the sprawling basement. Pictured, a shot of the work being carried out on the property

London developer Kam Babaee bought Amberwood House, the former home of renowned ballerina Dame Margot Fonteyn, for £22 million, but said it was not suited modern way of life spent an extra £28 million renovating the house, including spending £11 million on the sprawling basement. Here’s a shot showing the progress of the work on the property.

The Knightsbridge home is being transformed into an ultra luxury property, which Kam likens to a 'seven-star hotel', complete with a sauna, steam room, swimming pool, gym, and living area in the basement. Work is still underway but he hopes to sell the property for £75million once it is complete. Pictured, a shot of the high-end basement from last night's programme

Kam described the Knightsbridge house as an ultra-luxury property. The property will include a sauna and steam room, a swimming pool, a gym, and a living area in its basement. Work is still underway but he hopes to sell the property for £75million once it is complete. A shot of the basement, which is high-end, from last night’s program.

The developer told Tinie Tempah, left, that the house is not a 'five-star-hotel' but a 'seven-star-one' and that he only used the best materials for it. Pictured, the presenter and developer in the property on last night's show

Tinie Tempeah, left, was told by the developer that the house wasn’t a five-star-hotel but a seven-star-one and that he used only high-quality materials to build it. Last night’s host and the developer were pictured in the property.

Kam, a well-known developer for his glamorous London house makeovers in the 2010s, bought the house and made it a mega-mansion.

Kam stated, “When Amberwood House first went on the market, it was like a child in toy stores, I couldn’t wait to see the house,” 

It’s exciting to see the secret front door when I walk down the driveway.

Kam only kept the house’s exterior walls. He redid the entire house and dug to extend it vertically, digging as deep as 30m below ground. 

Presenter Tinie Tempah stated that Kam’s extension was one the last mega basements in Chelsea, Kensington. Due to noise, vibrations, dust, such basements are now banned. 

All Kam kept was the house's outer walls, but he redid the house completely, and dug down to extend it vertically, going as deep as 30 metres below ground. Pictured, work is still being carried out in the property

Kam retained only the house’s outer walls. He redid the house from scratch and dug to extend the house vertically, reaching as far as 30 metres below the ground. Pictured: Work is still being done in the property  

Presenter Tinie Tempah said Kam's extension was one of the last mega basements built in Kensington in Chelsea. He explained that such basement have now been banned due to noise, vibrations and dust. Pictured, an aerial view

Presenter Tinie Tempah stated that Kam’s extension was one the last mega basements in Chelsea, Kensington. He explained that such basements are now banned because of noise, vibrations, and dust. An aerial view 

The whole basement is clad floor-to-ceilling in sought-after marble shipped directly from Italy. Kam even explained he sent some of the marble back at a cost because he was not happy with the way it looked

The entire basement is covered in highly sought-after marble, shipped directly from Italy. Kam even said that he sent some of his marble back at a price because he wasn’t satisfied with the way it looked. 

The second lower ground floor of Amberwood House boasts exciting features, including a gym, pictured, a steam room and a hair salon

Amberwood House’s second floor offers many interesting features, including a gym (pictured), a steam room, and a hair stylist.

The swimming-pool, which is still empty at the moment, is one of the main features of Kam's second lower ground floor, which houses the health suite

Kam’s second floor lower ground floor houses the health suite. The swimming-pool is currently empty. 

Kam continued, “It didn’t fit the criteria you need to live a modern lifestyle: your hairdressing shop, walk-in closet, indoor swimming pool,” he stated. He explained that he designed the renovations for his target audience, ‘to make it feasible for a modern wealthy family, the stars of the world.

“I believe in leaving legacies, not just building properties.

The main feature of the extension was the 4,000 cube basement, which is spread out over two floors connected by a £480,000 staircase that took weeks to install. 

The gym, swimming pool and steam room are located on the second floor. 

The first floor of the lower ground floor is home to a commercial kitchen, as well as a family and commercial kitchen, a laundry room, and a large living room.

In order to avoid relying on artificial light, Kam also created a jaw-dropping sunken terrace for natural light. 

Kam, pictured, said he has been in love with Amberwood House from the moment it got on the market, and that he felt like a 'kid in a toy store'. Work is still being carried out on the property (pictured)

Kam (pictured) said that Amberwood House was his first love since it was put on the market and that he felt like an ‘intimate child in a toy shop’. The property is still under construction (pictured).

Amberwood house is a brick build from the 1920s which was one a socialite hotspot. Kam bought it with plans to develop it in the early 2010s

Amberwood house is a brick building dating back to the 1920s that was a socialite hotspot. Kam purchased it with plans for development in the early 2010s 

Viewers said spending so much money on a basement extension a obscene, and that said the renovations were an act of 'vandalism'

Viewers thought it was obscene to spend so much money on a basement addition, and that the renovations were an act ‘vandalism. 

The entire extension is made from one of the most sought after marbles. Tinie commented that Kam was all about ‘attention and detail’ to achieve opulence at the highest level’. 

Tinie stated that you must have taken all of the marble from Italy to achieve this. Kam said, “I’ve been to many spas in my life, and it’s not just any Spa, it’s next level,’ he added.   

Kam admitted that he had exceeded his budget for Amberwood House renovations, but he didn’t know how much.  

Tinie was very impressed by the results of the extension. But viewers thought it was ‘obscene’ and were very impressed with the results.

One said, “Shame on the original listed building and its history is forgotten about for an obscen extension.”

Another person said that “When you’re over budget by millions and you just smile,” 

“I’m sick and tired of rich people with too many money.” It’s disgusting and gross,’ one wrote.     

AMBERWOOD HOUSE’S GLAMOROUS HISTORY 

The original construction of the five-bedroom house was in 1928.

During WWII Amberwood House was the focus of intrigues, spies and plots. One such plot was by the Germans against the Panama canal. It was foiled.

Dame Margot Fonteyn, who was born in Surrey in 1919, became one of the most prominent dancers on international stage.

She has studied dance in London and Hong Kong.

She was elected president of the Royal Academy of Dancing, in 1954, and was made Dame of the Order of the British Empire, in 1956.

In 1955, she married Dr Roberto Emilio Arias (1918-1989), who was a diplomat and the son of Harmodio Arias (Panama’s President in the 1930s). 

Roberto was made Panamanian Ambassador the same year that they married. Amberwood House became their official London residence.

The couple was a glamorous mix of royalty, politicans or celebrities. Guests to Amberwood House during 1950s and 1960s included Prince Margaret, Antony Armstrong Jones, John Wayne, Yves Saint Laurent and Michael Somes. 

Rudolf Nureyev was Fonteyn’s most well-known dance partner. He stayed in Amberwood House as a guest with Fonteyn while he negotiated a contract with the Royal Ballet after he left for the West in 1961. 

Roberto was accused of plotting a coup against Panamanian President Ernesto de la Guardia Jr in 1959. However, the charges were dropped after a change to government.

Roberto was shot in Panama City in 1964 by Alberto Jimenez, a political friend who accused Roberto if he had an affair with his wife. Roberto was airlifted back from Panama City by Alberto Jimenez, who accused Roberto of having an affair with his wife. Roberto spent 18 months in London hospitals before he was discharged and spent the rest confined to a wheelchair. 

Roberto’s diplomatic career was ended by the shooting. The couple moved to Amerden Bank in Taplow, their country home, which Fonteyn had bought in 1954. After Fonteyn’s retirement, the pair relocated to Panama.

In the late 1990s, Amberwood House was becoming very outdated and the Panamanian Embassy had to move to a newly renovated mansion at 40 Hertford Street, Mayfair. Amberwood House was rented out to a variety of tenants but became increasingly neglected.

Amberwood House, in desperate need of rescue, was purchased in 2011 by K10 Group. They then developed plans with GMA Architecture for the renovation and extension of the property. The permit was granted in April 2016. K10 Group, in collaboration with Argent Design, designed the interior design scheme and specification.