Ground work ahead of the October start
Crews began deep soil mixing at 750 Claughton Island Drive by 2 September 2026, the date Floridian Development published its report. The technique strengthens ground before foundation work starts. Swire Properties and Mandarin Oriental Hotel Group plan the tower groundbreaking for October 2026. The towers rise in 2027. Completion sits at 2030.
Brickell Key is an artificial island. Ground preparation carries more weight on made land, and the report ties the same sequence to Citadel's headquarters a short distance away.
Four permits carry the first phase
The county record lists four approvals: soil improvement tied to the deep soil mixing, site cleanup, a foundation permit for the hotel tower, and a master building permit for the residential structure. Several sit issued. Others sit under review.
The order fixes the schedule. Ground improvement precedes foundations. Foundations precede the vertical rise.
$226 million against 1,286,326 square feet
The issued master building permit carries an estimated cost of $226 million. The same permit covers 1,286,326 square feet of new construction.
Both figures attach to a filing. The square footage measures new construction, so it carries no saleable area and no gross building area. The cost estimate moves as the build proceeds.
The counts reconcile tower by tower
The development holds 294 units and 149 keys. The south tower takes 228 residences. The north tower takes 66 residences, 121 hotel rooms and 28 hotel-branded residences.
228 plus 66 gives 294 units. 121 plus 28 gives 149 keys. The north tower holds every hotel room and every branded residence on the site.
850 feet on the south side
The south tower rises 66 stories to 850 feet. The north tower reaches 33 stories and 426 feet. Kohn Pedersen Fox designed both. Balconies and floor-to-ceiling glass wrap each tower, and an ornate crown caps each one.
Sales carried the groundbreaking
Units in both towers broke records when they first reached the market, the report states. Water sits visible in three directions from the site.
The report traces the momentum behind the groundbreaking to that sales performance and to the setting. It publishes no price per square foot, no absorption rate and no sellout total.
That gap matters to a development desk. The file shows demand under the start and shows no contract value behind the demand.
Commercial area and parking sit outside the filing
Swire and Mandarin Oriental have filed no commercial plan and no parking plan with a public board. The report states that commercial square footage and parking counts are therefore unavailable. It adds that the finished development will likely carry commercial space and parking for each residence.
Both figures sit inside an operating case. Commercial area sets a rent roll. Parking sets the stall count a residence can rely on.
The site came down before it went up
The former Mandarin Oriental opened in 2000 with 326 hotel rooms. It came down in a controlled implosion on Sunday 12 April 2026, reported by the Miami Herald, WLRN, NBC 6, CBS News and IslanderNews.
Debris cleanup has neared completion. Deep soil mixing runs in the areas already cleared.
Handover in 2030 carries no month
The record gives 2030 for completion. It carries no opening month, no hotel operating agreement and no suite split inside the 121 rooms.
The amenity list runs to pools, private waterfront cabanas, sports courts, a spa, a wellness deck, resident lounges and planted outdoor space. It names no meeting room, conference suite or ballroom.
That absence shapes the hotel brief. A 121-key property with no published meeting space sells rooms, the brand and the amenity deck.