Waldorf Astoria Miami Begins Final Cube as Supertall Nears Topping Out

• Construction has begun on the ninth and final cube of the Waldorf Astoria Hotel & Residences Miami at 300 Biscayne Boulevard in Downtown Miami.
• The 100-story, 1,049-foot tower has reached approximately level 85 and is expected to top out this winter, according to construction-site signage cited in the source article.
• Developed by Property Markets Group, Greybrook Realty Partners, S2 Development and Mohari Hospitality, the project will include 360 private residences, 205 hotel rooms and suites, and retail and culinary spaces.
• The tower is designed by Carlos Ott in collaboration with Sieger Suarez Architects, with BAMO handling interior design and John Moriarty & Associates serving as general contractor.

What The Final Cube Means For The Tower

The Waldorf Astoria Hotel & Residences Miami has entered one of the most visually important stages of construction. Crews have started forming the ninth and final cube of the 1,049-foot tower, bringing the supertall closer to its planned topping out. The project at 300 Biscayne Boulevard is built around nine stacked and offset glass volumes. Each cube shifts as the tower rises, creating the unusual silhouette that has made the Waldorf Astoria one of the most recognizable projects taking shape in Downtown Miami. The final cube is especially significant because it creates the tower's most dramatic upper cantilever. Once the concrete structure and façade are completed, the building's full sculptural profile will be much easier to see from across the Miami skyline.

What The Construction Progress Shows

Recent construction photos show crews working above the eighth completed cube while concrete work begins on the ninth. The structure has reached approximately level 85, although that number should not be confused with the project's official 100-story count because the tower's structural levels and occupied floors do not correspond one-to-one. The pace has accelerated considerably over the past year. Earlier in 2026, concrete construction had passed the 60th floor and entered the sixth cube. Now, roughly six months later, crews have advanced to the final volume. Curtain wall installation is also moving upward. Dark reflective glass has already enclosed significant portions of the lower cubes, while the upper sections remain exposed as crews continue working on slabs, columns, formwork and temporary protection.

What The Building Will Include

The completed Waldorf Astoria Miami is planned to include 360 private condominium residences and 205 hotel rooms and suites. The project will also feature retail and culinary destinations, bringing the Waldorf Astoria brand to Miami for the first time. The design combines hospitality and residential uses within the stacked cube configuration. According to architect Carlos Ott's project description, the nine volumes are arranged to create distinctive views from different parts of the building while giving the tower its gravity-defying appearance. The tower's interiors are being designed by BAMO, while the architecture is led by Carlos Ott in collaboration with Sieger Suarez Architects.

What The Foundation Work Took To Complete

The tower's vertical rise followed a major foundation operation in June 2024. John Moriarty & Associates and Capform completed a continuous 31-hour mat foundation pour using approximately 12,400 cubic yards of concrete. The operation involved about 195 workers and 1,240 concrete truck deliveries, providing the structural base needed for the tower's vertical construction. The milestone was described by the development team as one of the major steps toward turning the long-planned project into a visible part of Miami's skyline. Construction financing was also secured in 2024, with $668 million provided by Bank OZK and Related Fund Management. Greybrook said at the time that the financing represented the largest construction loan for a residential condominium development in Florida.

What The Waldorf Astoria Means For Miami

At 1,049 feet, the tower is planned to become the first supertall skyscraper in Florida, crossing the 300-meter threshold. Its height and unusual nine-cube design are expected to make it a defining addition to the Downtown Miami skyline. The project also represents the Miami debut of the Waldorf Astoria brand, adding a major international hospitality name to the city's growing collection of luxury residential and hotel developments. Construction began in 2022, and completion is currently anticipated for the second quarter of 2028. With the ninth cube now underway, the project is entering the final major phase of its vertical construction before the focus shifts increasingly toward façade installation, interiors and finishing work.