A tri-level penthouse crowning the Philippe Starck–designed ICON South Beach has hit the market for $28.9 million — and its rooftop alone is larger than most luxury homes.
Located at 450 Alton Road, Unit PH1, the seven-bedroom residence spans 9,039 square feet of interior space, but it’s the staggering 11,000-square-foot private rooftop terrace that sets this property apart.
In a neighborhood known for trophy inventory, this penthouse pushes scale to another level.
The property is listed with Eddy Martinez and Roland Ortiz of ONE Sotheby’s International Realty.
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Sitting atop one of South of Fifth’s most recognizable buildings
ICON South Beach remains one of the defining towers of the South of Fifth skyline.
Designed by Philippe Starck, the building is instantly recognizable for its bold interiors and architectural presence along Miami Beach’s waterfront.
With uninterrupted views in every direction
Occupying the crown of the tower, PH1 benefits from uninterrupted exposure in every direction — ocean, bay, skyline, and Fisher Island all within view.
An 11,000-square-foot private rooftop in the sky
The defining feature of the trophy three-level penthouse is the enclosed 11,000-square-foot rooftop terrace — one of the largest private rooftops in Miami Beach.
At this elevation, the rooftop functions less like a terrace and more like a private resort deck suspended above the city.
Including a saltwater pool, outdoor kitchen, and wraparound terraces
The space includes a saltwater pool, expansive lounge zones, a professional-grade outdoor kitchen with BBQ, dining space for 18, and a fire pit.
Multiple wraparound terraces extend across all three levels of the residence, reinforcing a seamless indoor-outdoor layout rarely achieved at this scale.
Three levels connected by sculptural floating staircases
Inside, two dramatic floating staircases illuminated by skylights connect the residence’s three levels.
The staircases act as architectural centerpieces rather than mere transitions, reinforcing the vertical drama of the home. A private elevator provides additional access between levels.
Twenty-foot glass walls framing Miami’s skyline
The main living room is flanked by 20-foot floor-to-ceiling glass walls that capture sweeping views from sunrise over the Atlantic to sunset behind the Miami skyline.
From nearly every vantage point, the city becomes part of the interior composition — cruise ships gliding past Fisher Island, open bay expanses, and Downtown Miami illuminated at night.
Built for large-scale entertaining
Beyond the rooftop, the penthouse includes two family rooms, a dedicated bar lounge, a billiards room, and two wine cellars.
The layout supports both formal entertaining and private living, with zones distributed across levels to maintain flexibility and privacy.
A principal suite wrapped almost entirely in glass, bathroom included
The primary suite is fully encased in glass, creating an immersive panorama from bed to bath.
The spa-inspired bathroom features a floating shower and soaking tub positioned to take advantage of the views, along with multiple walk-in wardrobes that reinforce the suite’s scale and separation from the rest of the residence.
A private gym and seven-car garage in the sky
A private gym completes the wellness component of the home, while a rare private seven-car garage adds an unexpected layer of convenience, especially in a neighborhood where parking itself is often at a premium.
For a penthouse at this elevation to include dedicated garage space of this scale is notable even by Miami standards.
South of Fifth remains Miami Beach’s most elite pocket
The South of Fifth neighborhood continues to command some of the highest prices per square foot in Miami Beach, known for its marina proximity, walkability, and trophy condominiums.
From PH1’s position atop ICON South Beach, residents are minutes from the beach, top-tier dining, and the South Pointe Park waterfront — while enjoying privacy and elevation far above street level.
A trophy penthouse with a rooftop larger than most mansions
At 11,000 square feet, the rooftop terrace alone rivals — and in many cases exceeds — the total footprint of single-family estates.
Combined with 9,039 square feet of interior space, the ICON penthouse delivers a rare blend of vertical drama, horizontal scale, and unobstructed panoramic exposure.
At $28.9 million, PH1 stands as one of the most dramatic penthouse offerings currently available in Miami Beach.
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