Complete Foundation Pour as South Tower Set to Go Vertical

August 7, 2026
The Naional Law Review

Developers of The St. Regis Residences, Sunny Isles Beach Complete Foundation Pour as South Tower Set to Go Vertical

Coastal Construction mobilized 500 workers and 1,100+ truckloads to deliver 10,000 cubic yards of concrete to one of Florida's most iconic oceanfront addresses.

Fortune International Group and Château Group, developers of The St. Regis Residences, Sunny Isles Beach, Miami, have reached a significant construction

milestone with the South Tower’s mat foundation pour, advancing the ultra-luxury oceanfront development at 18801 Collins Avenue into its next phase. The positive collaboration with Coastal Construction is one of several over the years between the development team and the acclaimed General Contractor.

Over a continuous three-day operation, the pour involved approximately 10,000 cubic yards of concrete, creating the structural foundation for the 170-residence South Tower – one of two 62-story towers that will each rise 750 feet above the Atlantic Ocean. With the foundation now in place, the South Tower will transition to vertical construction this year, while preparations continue for the project’s second and final phase: the 150- residence North Tower, which is scheduled to break ground in early Q4.

With the Atlantic Ocean in view, Coastal Construction crews complete the South Tower's landmark mat pour at The St. Regis Residences, Sunny Isles Beach, Miami.

The South Tower's mat pour takes shape, setting the stage for vertical construction this year.

By the Numbers:

• 10,000 cubic yards of concrete for the South Tower mat foundation, poured continuously over three days (July 24–26)

• Approximately 4 million pounds of reinforcing steel (rebar)

• 1,100 concrete truck deliveries

• 500 construction workers involved in the three-day operation

• 6 boom pumps working simultaneously for more than 30 hours

• 150-foot by 135-foot mat foundation footprint

• 13-foot-thick reinforced concrete mat foundation

• 435 linear feet of direct Atlantic Ocean frontage – the longest stretch of ocean frontage of any luxury residential development currently under construction in South Florida

“Every major project reaches a point where years of planning, engineering and construction begin to take visible shape,” said Edgardo Defortuna, CEO of Fortune International Group. “Completing the foundation is one of those moments. It represents an extraordinary amount of work below the surface and marks the beginning of the next chapter as the South Tower starts to rise."

“For our residents, this milestone is especially meaningful because they will now begin to see the building emerge,” said Manuel Grosskopf, CEO of Château Group. “Construction is entering a highly visible phase, and we’re excited to see the vision continue taking shape as we move toward delivery. Each step brings us closer to delivering not just a building, but a home our residents will be proud of for generations.” Designed by Arquitectonica and developed by Fortune International Group and Château Group, The St. Regis Residences, Sunny Isles Beach, Miami is an amenity-rich, ultra-luxury two-tower enclave with

435 linear feet of direct Atlantic frontage. Over three consecutive days, crews complete the South Tower's foundation pour, marking a major

construction milestone.

“South Florida continues to see tremendous demand for luxury waterfront residences, and we’re honored that developers continue to trust Coastal Construction with some of the region’s most complex projects,” said Tom Murphy, Coastal Construction Co-CEO. Designed by Arquitectonica, The St. Regis Residences, Sunny Isles Beach, Miami will feature 435 linear feet of Atlantic Ocean frontage. Residents will enjoy more than 70,000 square feet of indoor and outdoor amenities, including two public-facing restaurants, a full-floor private spa, indoor and outdoor pools, a fitness and wellness center, a private residents’ club, children’s programming, and the signature St. Regis Butler Service. Conceived as a private oceanfront residential resort, the development combines the hallmark hospitality of the St. Regis brand with an expansive amenity program designed for everyday living. The South Tower remains on track and on pace, hitting every major construction benchmark as the project moves steadily toward vertical construction and,

ultimately, delivery.

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Coastal Construction mobilized 500 workers and 1,100+ truckloads to deliver 10,000 cubic yards of concrete to one of Florida's most iconic oceanfront addresses.
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