A Look Inside London’s Most Outrageous ‘Iceberg’ Homes
— Updated on 15 September 2023

A Look Inside London’s Most Outrageous ‘Iceberg’ Homes

— Updated on 15 September 2023

London is one of the most affluent cities in the world with a vibrant property market to match, but a lack of general space combined with some overwhelmingly tight council restrictions, have started to force the elites of London underground into ‘iceberg’ homes.

Known as ‘iceberg’ homes because of their inverted ratios above and below ground, these extravagant properties have become all the rage amongst the city’s wealthiest residents with a desire for urban space. 

A study by Newcastle University’s global urban research unit found that 4,650 basements have been granted planning approval in some of the most affluent suburbs in the British capital. Further details revealed that plans for around 1,000 gyms, 456 cinemas, 381 wine cellars, 376 pools, 340 games rooms, 242 saunas or steam rooms and 63 underground garages were approved between 2008 and 2017.

RELATED: 40-bedroom Mansion Becomes London’s Most Expensive After Listing For $445 Million

While many of these basement extensions are still in development or remain hidden from public view, we’ve managed to sniff out a few floorplans and photos of some of the most outrageous ‘iceberg’ homes you’ll find (or won’t find) in London. 



Edmund & Carol Lazarus’ Leisure Center

Proposed by ADAM Architecture for clients Edmund and Carol Lazarus, this 16,000-square-foot basement renovation is one of the biggest ever approved. Located below a Victorian villa in Holland Park and worth a tidy AU$31 million, this three-story below-ground construction features an 82-foot swimming pool, hot tub, sauna, gym, steam room, massage room, entertainment room, wine cellar and cigar room. It took a reported 50 weeks to complete and is said to have cost Lazarus almost AU$19 million.


House in Primrose Hill

In 2022, the team at Jamie Fobert Architects undertook a very significant renovation of a Victorian home in the affluent suburb of Primrose Hill. While the exterior of the residence remained untouched, the firm designed an enormous underground basement area that saw the home expand into a spacious five-bedroom home complete with an indoor pool lined with travertine. A system of skylights brings natural light down into the below-ground levels, making for one of the more tasteful “iceberg” homes you’ll ever see.


The Jon Hunt Car Museum

The founder of Foxtons estate agents, Jon Hunt, is not only a successful businessman but also a massive rev head. Quickly requiring somewhere to store his growing car collection, Hunt submitted plans for a five-story ‘Ferris wheel’ carousel below his London home that would include glass floors and viewing galleries. Not content with just having his own private garage, Hunt’s ambitious subterranean plans also included a swimming pool and a full-size tennis court.


Russell Gardens Mews – West London

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This mid-terrace London home was completely refurbished by Hogarth Architects to create a more family-friendly living space, as well as a little more fun downstairs. The sizeable subterranean area features a large wellness area including a steam room and sauna, as well as a light-up dance floor and a 70s-inspired sunken conversation pit. As far as unassuming private ‘iceberg’ homes in London go, this is up there with the best.


Robert Beecham’s Outrageous Abode

london iceberg homes

Billionaire Robert Beecham made his fortune selling children’s toiletries after securing the first Star Wars product licence in Europe in 1976. Deciding to upgrade his property in Primrose Hill, Beecham knocked down his detached six-bedroom home and built a seven-bedroom mansion with a 200-foot-long basement. The below-ground level has everything you could ever want, including a 65-foot-long swimming pool, jacuzzi, games room, cinema and even Turkish baths. There’s also a juice bar next to the pool, or for those that want something a little stronger, a fully stocked bar and wine cellar.


The Ultimate Anonymous ‘Super Basement’

london iceberg homes

While nobody is quite sure where this property is located, the plans for this extensive renovation have been doing the rounds for a number of years and are often used in articles about the rise of ‘Iceberg’ homes in the UK. As you can see, no expense has been spared, with the multi-level basement boasting a bowling alley, rocking climbing wall, cinema, kitchen, wine cellar and vintage car museum. It’s like the Batcave on steroids and easily one of the most ludicrous ‘Iceberg’ homes out there.


Havona House – Notting Hill

london iceberg homes

This seven-story home was on the market last year for a whopping £25 million (AU$49.2 million), making it the most expensive property ever listed in London’s wealthy suburb of Notting Hill. The impressive residence merges traditional Georgian architecture with modern furnishings and has three basement levels that hide a 70-foot pool that can transform into a ballroom, three additional bedrooms, a multi-car garage and a private spa area. 

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