300 N Biscayne Blvd, Miami FL 33132
About this home
BILLIONAIRE NEIGHBOR ALERT: Live Next Door to Ajay Gupta in Miami's Ultimate Mansion in the Sky. Penthouse 401 at Waldorf Astoria Residences Miami — a half-floor sky mansion in Cube 9, beside Ajay Gupta's own residence at the very top of the Penthouse Collection. 6,597 SF, 4 BR / 5.5 BA, private elevator, 13-foot ceilings, private pool, and 613 SF Sky Conservatory. Sweeping NE views of Miami Beach, Biscayne Bay, the Atlantic, and the downtown skyline. BAMO interiors. Wolf & Sub-Zero. Italian cabinetry. Exclusive 5-star beach club with Major Food Group, helicopter access, Peacock Alley, Michelin-star dining. Imagine living next to Ajay Gupta — the ultimate proximity — for under $25M. Truly a one-of-a-kind mansion in the sky. Offered at $24,350,000. 96% sold. Topping off now, completion early 2028.
Features
- Built-in Features
- Cooking Island
- Elevator
- Fire Sprinklers
- Entrance Foyer
- Walk-In Closet(s)
- Den/Library/Office
- Storage
- Utility Room/Laundry
- Open Balcony
- Bay
- Water View
Estimated loan & HOA
Loan payment and HOA only. Property tax and insurance are significant here and are not included.
- Principal & interest
- $123,127
- HOA
- $8,246 / mo
Illustration only — not a loan offer, quote, or commitment. Assumes a 30-year loan at 6.5% with 20% down (rates as of July 2026); your actual terms will differ.
Schedule a tour
Request a private or video tour with a local agent.
Run the numbers
We fill in the price and the building's HOA dues. That leaves rent, tax, insurance and maintenance — they depend on your exemptions, your insurer and the unit, so we don't guess them. Vacancy and the loan terms below start at common defaults; change them.
Enter rent, property tax, insurance, maintenance to see the returns. A cap rate calculated without every cost overstates the deal — often by half — so we don't show a partial one.
Illustration only — not a loan offer, quote, or investment advice. The loan fields start at 20% down over 30 years at 6.5% (rates as of July 2026); that is a nominal rate for illustration, not an APR, and your actual terms will differ. Cap rate is unlevered; cash-on-cash counts the down payment as invested capital and excludes closing costs.
Listing data from the MIAMI Association of REALTORS® (MIAMIRE) IDX program. Information deemed reliable but not guaranteed. Demo data shown for layout purposes.