The most expensive apartment in the world: Mareterra (Le Renzo) or Tour Odéon?
Publié par Paolo Petrini le 23/04/2026
Temps de lecture
16
min.
Monegasque Real Estate Market
The Tour Odéon penthouse in Monaco remains one of the most iconic benchmarks in ultra-luxury real estate worldwide, with an estimated valuation of around €380 million. To date, no publicly confirmed transaction has established a higher price for another apartment.
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In 2026, several international publications, including Bloomberg, reignited the debate by referencing a property located at Mareterra (the Le Renzo project) as potentially reaching record valuations, often cited around $550 million (approximately €500 million).
However, these figures should be interpreted with caution: the amounts reported appear to be market estimates rather than publicly documented transaction prices. In this article, we analyze the available data and explain why the Tour Odéon penthouse remains, to this day, a global reference in the ultra-prime residential segment.
Has Mareterra (Le Renzo) become the most expensive apartment in the world?
In 2026, several international media outlets, including Bloomberg, suggested that an apartment in Mareterra (Monaco) could be among the most expensive residential properties in the world. This claim is based on partial information, while no publicly documented transaction price has been made available to date.
2026 Market Analysis
Tour Odéon vs Mareterra (Le Renzo): what the available data actually shows
| Criteria | Tour Odéon | Mareterra (Le Renzo) |
|---|---|---|
| Reported valuation | ≈ €380M | ≈ $550M (≈ €500M) |
| Confirmed public transaction | No | No |
| Documented timeline | On the market since 2015 | Acquisition mentioned around 2021 (not publicly documented) |
| Source type | Market data / developer communication | International media reports |
| Level of evidence | Consistent historical market reference | Estimate not corroborated by public transaction data |
| Main limitation | No officially confirmed sale | No verifiable public price data |
| Market interpretation | Historical benchmark of the segment | Media-driven valuation hypothesis |
Analysis: The figures attributed to Mareterra appear to reflect theoretical valuations, likely derived from current Monaco market price levels. In the absence of public transaction data, the actual acquisition price cannot be confirmed and may differ significantly depending on timing and negotiation conditions.
Information regarding Mareterra is based on media reports. No public document currently confirms a transaction price.
At this stage, the figures associated with Mareterra should therefore be understood as estimated valuations rather than confirmed transaction prices.
- No official sale price has been publicly disclosed
- Reported figures may be based on price-per-square-meter projections
- In ultra-prime real estate, private negotiations can significantly impact final prices
In summary: Mareterra currently fuels media attention, but the Tour Odéon penthouse remains the reference as long as no verifiable public transaction establishes a higher record.
Inside the World’s Most Expensive Penthouse
Rising 170 meters above the Principality, the Tour Odéon stands as a modern symbol of vertical luxury. Completed in 2015, this twin-tower architectural landmark is one of the tallest residential buildings along the Mediterranean coastline and has become an unmistakable part of Monaco’s skyline.
Designed by architect Alexandre Giraldi with interiors by the late Alberto Pinto, the tower embodies contemporary elegance and discretion. While residents benefit from exceptional services and a prime location, it’s the penthouse perched at the very top that has redefined the meaning of real estate prestige.
For more information about the building’s amenities, apartments for sale, and current availability, you can visit our dedicated page about the Tour Odéon residence in Monaco.
At the summit of Tour Odéon sits its most extraordinary unit: a multi-floor penthouse often dubbed “the Sky Penthouse.” Spanning five levels (occupying roughly floors 45 through 49 of the tower), this penthouse offers an astounding ≈3,300 m² (~35,500 sq ft) of living space, making it one of the largest apartments ever constructed. Every corner of this residence exudes extravagance and meticulous attention to detail – truly redefining luxury living and pushing the boundaries of opulence.
Key features and amenities of the Tour Odéon penthouse include:
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Unmatched panoramic views: The penthouse provides a 360° view of the Mediterranean coastline, encompassing Monaco’s cityscape and even parts of the French and Italian Riviera. Floor-to-ceiling windows and expansive terraces on each floor allow its occupants to soak in breathtaking sea and city vistas at any time of day or night.
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Palatial living spaces: The interiors boast multiple reception rooms and lounges, including a grand dining hall with a soaring ceiling (around 6 meters high) evoking the splendor of a ballroom. The layout includes five spacious bedroom suites, each an oasis of comfort with en-suite baths and dressing rooms. Fine materials like marble, exotic woods, and bespoke finishes are used throughout, giving an atmosphere of refined elegance.
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Multiple kitchens: Unusually, the penthouse is equipped with five kitchens, each fully fitted with high-end appliances. This allows for specialized kitchens (e.g., for main cooking, pastry, or kosher/halal preparation) or simply the convenience of having a kitchen on different levels of the residence. Whether for catering grand events or intimate family dinners, these kitchens can handle it all in style.
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Private leisure facilities: The penthouse functions as its own private resort. It features a dedicated movie theater/cinema room for private screenings, a fully equipped fitness center/gym exclusive to the penthouse, and a luxe spa area with sauna and hammam (steam room). One floor even houses a nightclub-style entertainment space – including a bar and dance floor – allowing the owner to host parties without ever leaving home.
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Indoor and outdoor pools with a slide: Perhaps the most jaw-dropping feature is the penthouse’s rooftop infinity pool. Perched at the very top of the tower, this open-air pool offers unparalleled views of the sea and sky. Adjacent to it is a giant curved water slide that actually connects an upper-floor dance floor down to the pool, spiraling two stories down. Guests can literally slip from the private dance club into the pool, creating a one-of-a-kind luxurious playground in the sky. There is also an indoor pool within the penthouse for year-round swimming.
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Lavish bespoke details: The interior decor and finishes were custom-designed by the renowned late designer Alberto Pinto, ensuring each room meets the highest standards of aesthetics and comfort. Reports from the planning phase mentioned extravagant touches like a master bedroom roughly the size of two tennis courts and unique materials (e.g. tables upholstered in stingray leather, ebony wood cabinetry, and a marble-adorned staircase) to set this penthouse apart. Every element – from lighting to climate control to the integrated sound systems – can be controlled via advanced home automation, giving residents complete command over ambiance and comfort at their fingertips.
Living in this penthouse is akin to having a personal palace in the sky. It offers more than just a home – it delivers an exclusive experience that includes entertainment, wellness, and security on a grand scale. As one real estate observer aptly put it, Tour Odéon’s penthouse is “a voluminous space [that] includes a cinema, billiard room, fitness room, and even a water slide descending directly from a dance floor into [a] private infinity pool”. In essence, the owner of this penthouse would have every luxury amenity imaginable, all within their personal residence.
A Record-Breaking Price Tag
The Tour Odéon penthouse’s price is as astonishing as its features. With an estimated value in the range of €380 million (approximately $412 million), it outshines all other known luxury apartments in price. In fact, when the Odeon Tower project was nearing completion, real estate experts predicted the penthouse could set a world record with a potential sale price well above $400 million. This figure would easily eclipse the previous record-holder for apartment sales – a London penthouse at One Hyde Park that sold for about $237 million in 2014.
To put this in perspective, Monaco is famed for having the most expensive real estate on a per-square-meter basis in the world. Even in that context, the Odeon penthouse stands out. Local market reports indicated units in the tower have sold for over €90,000 per square meter. No other residence has publicly been listed at the price level of the Tour Odéon penthouse (excluded Mareterra and buildind as Le Renzo). It effectively set a new benchmark for ultra-prime real estate: a single apartment unit valued at a third of a billion euros.
It’s important to note that this penthouse was initially offered for sale, but finding a buyer for such a trophy property can be challenging even among the global billionaire class. The lofty price tag – some media called it “fanciful” at €300M – reflects its unique status. As of today, the penthouse has not been sold outright. Instead, it eventually found a different route to occupancy, as we’ll discuss next.
A Mystery Tenant in an Opulent Sky Palace
For several years after its completion, the world’s most expensive apartment sat empty, awaiting the right buyer. Nearly five years passed with the penthouse unoccupied – an emblem of exclusive real estate that had yet to find its resident. Then, in late 2019, news broke that the penthouse had finally been leased to a tenant, rather than sold. According to the building’s developer (Groupe Marzocco), an unidentified tenant began renting the penthouse, though they kept this low-key for some months.
The identity of the mystery renter has been kept strictly confidential. In typical Monaco fashion – where privacy and discretion are highly valued – neither the owner (Marzocco family) nor their agents have revealed who is living in the penthouse. A spokesperson for the Marzocco Group confirmed the rental arrangement to the press but declined to give any details, citing “professional secrecy” and the principality’s custom of discretion regarding personal data.
Naturally, this secrecy spurred curiosity and speculation in the media and among locals. Many wondered who could afford such a rental and what the rent might be. While official figures are not public, real estate observers estimated that the penthouse could command a monthly rent in the ballpark of €300,000–€400,000 (approximately $350,000–$450,000 per month). This astounding rent would make it one of the most expensive leases ever, befitting the world’s priciest apartment.
Despite the public intrigue, Monaco’s strict culture of privacy means the tenant’s name remains unknown, and no photos or details of the furnished interior have been released. What is clear is that whoever resides there is experiencing a level of urban living unmatched anywhere else. The combination of privacy, security, and luxury in the Tour Odéon penthouse is unparalleled – the tenant enjoys not only the pinnacle of residential amenities but also anonymity, perched high above Monte Carlo.
This air of mystery only adds to the penthouse’s allure. Even without a public owner figurehead, the Tour Odéon penthouse has secured its place in real estate history. It’s a property that symbolizes extreme wealth and exclusivity, capturing the imagination of investors and luxury aficionados worldwide.
An Exclusive Lifestyle Above Monaco
In summary, the Penthouse at Tour Odéon is far more than the “most expensive apartment in the world.” It is the ultimate statement of luxury living, a place where extravagance knows no limits. From its panoramic rooftop pool and slide, to its private cinema and nightclub, every facet of this residence showcases a “billionaire’s playground” crafted in the sky. Valued in the hundreds of millions, it stands as a symbol of elite real estate and the lengths to which design and service can go to cater to the ultra-rich.
Monaco’s Odeon Tower penthouse has redefined what an apartment can be, blurring the line between home and self-contained luxury resort. It embodies the pinnacle of refinement and exclusivity, nestled in a city already known for glamour, security, and lavishness. Living at the top of Tour Odéon means enjoying a private lifestyle that few could even imagine – truly a life above all others, literally and figuratively.
If reading about this extraordinary property has sparked your imagination, consider that Monaco offers many other luxury residences (albeit on a more attainable scale). In fact, our agency is proud to offer a sublime 5-room apartment for rent in Tour Odéon – a chance to live in Monaco’s most prestigious address. Don’t miss this opportunity to experience the summit of luxury living in Monaco; feel free to contact us for more information and to make your dream of an exclusive Monaco residence come true.
Other Record-Breaking Apartments Around the World
The Tour Odéon penthouse currently tops the list in terms of price and extravagance. No other apartment has been publicly marketed at such a high price point. For comparison, the previous record-holder for an apartment sale was a penthouse in London’s One Hyde Park, which sold for about $237 million in 2014. In 2019, hedge-fund billionaire Ken Griffin purchased a New York penthouse (at 220 Central Park South) for $238 million, marking the highest price ever paid for a home in the U.S.. Those are staggering figures, but they are still lower than the Odeon penthouse’s valuation.
There have been other ultra-expensive listings, such as a triplex penthouse in New York’s Central Park Tower that was initially priced at $250 million (it later reduced and reportedly sold for a lower amount), and some massive penthouses in London or Hong Kong occasionally rumored in the $150–200+ million range. However, Monaco’s Odeon Tower penthouse remains unmatched when it comes to the combination of a high eight-figure/low nine-figure price tag and the sheer opulent features. It is essentially in a league of its own.
The Odeon Tower penthouse is unique, but there are a few other ultra-luxury apartments that come close in terms of prestige and high price, if not equal. Some examples include:
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Penthouse at One Hyde Park, London (UK): Sold for ~$237 million, it previously held the record for the most expensive apartment sale. One Hyde Park is an extremely exclusive residence in London’s Knightsbridge, known for its security and luxury services (it even has a car showroom and tunnel to a hotel).
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220 Central Park South Penthouse, New York (USA): Sold for $238 million to Ken Griffin in 2019, this was the highest price ever paid for a residence in the U.S. It’s a multi-floor penthouse with Central Park views and is in a building famed for its classical design and wealthy residents.
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Central Park Tower Penthouse, New York: Initially listed at $250 million in 2022, this triplex atop the tallest residential building in the world (Central Park Tower) was billed as the highest asking price in the U.S. If it had sold at that price it would rival the Odeon penthouse, but reports say it eventually sold for a lower price around $100+ million.
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Various penthouses in Monaco or the Middle East: Monaco itself has other extremely pricey properties (though none as high as Tour Odéon’s penthouse). In Dubai and other cities, there have been penthouses in six-star developments that ask over $100 million. Hong Kong’s luxury apartments have also fetched enormous sums (a duplex apartment there sold for around $66 million, and a mansion property went for $361 million, though that was a landed home).
Still, even among these, the Tour Odéon penthouse stands at the exclusivity. It’s like the “Mount Everest” of luxury apartments – there might be a few peaks in the world that come close, but none have quite surpassed it as of today in both value and fame.
Is the Tour Odéon penthouse the largest apartment in the world?
The Tour Odéon penthouse ranks among the largest residential apartments ever built within a single building, with approximately 3,300 sqm (35,500 sq ft) of interior space spread across five levels.
This scale is exceptionally rare on a global level. By comparison, most ultra-luxury penthouses in cities such as New York or London typically range between 500 and 1,000 sqm, even in the most prestigious developments.
However, since 2026, some recent projects in Monaco—particularly Mareterra (Le Renzo)—have been mentioned as potential competitors in terms of size. According to sources such as Bloomberg, the property is reported to offer approximately 2,500 sqm of interior living space, excluding terraces.
When including outdoor areas, certain market estimates suggest a total surface that could reach around 3,500 sqm. However, no publicly verifiable official data currently confirms these figures or the methodology used to calculate them.
In this context, it is essential to distinguish between confirmed data and market estimates:
- Tour Odéon: ≈ 3,300 sqm (widely documented data)
- Mareterra (Le Renzo): ≈ 2,500 sqm interior (media-reported figure)
- Mareterra including terraces: unverified estimate (~3,500 sqm)
Key takeaway: while some estimates position Mareterra as potentially larger in total surface area, the Tour Odéon penthouse remains the most reliably documented benchmark in the absence of publicly confirmed data demonstrating a larger apartment.
In other words, the Tour Odéon penthouse remains one of the largest apartments in the world based on verified data, while Mareterra represents a high-profile but still unconfirmed market hypothesis.
Is the Tour Odéon penthouse the largest apartment in the world?
The Tour Odéon penthouse ranks among the largest residential apartments ever built within a single building, with approximately 3,300 sqm (35,500 sq ft) of interior space spread across five levels.
This scale is exceptionally rare on a global level. By comparison, most ultra-luxury penthouses in cities such as New York or London typically range between 500 and 1,000 sqm, even in the most prestigious developments.
However, since 2026, some recent projects in Monaco—particularly Mareterra (Le Renzo)—have been mentioned as potential competitors in terms of size. According to sources such as Bloomberg, the property is reported to offer approximately 2,500 sqm of interior living space, excluding terraces.
When including outdoor areas, certain market estimates suggest a total surface that could reach around 3,500 sqm. However, no publicly verifiable official data currently confirms these figures or the methodology used to calculate them.
In this context, it is essential to distinguish between confirmed data and market estimates:
- Tour Odéon: ≈ 3,300 sqm (widely documented data)
- Mareterra (Le Renzo): ≈ 2,500 sqm interior (media-reported figure)
- Mareterra including terraces: unverified estimate (~3,500 sqm)
Key takeaway: while some estimates position Mareterra as potentially larger in total surface area, the Tour Odéon penthouse remains the most reliably documented benchmark in the absence of publicly confirmed data demonstrating a larger apartment.
In other words, the Tour Odéon penthouse remains one of the largest apartments in the world based on verified data, while Mareterra represents a high-profile but still unconfirmed market hypothesis.
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