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445 Grand Bay Dr # 303, Key Biscayne FL 33149
About this home
First time ever on the market, elegant, private and comfortable 4 beds, 4 baths unit in exclusive "The Grand Bay Residences", offering true coastal resort style living. Sophisticated and sought-after building located within a security gated community on the luxurious Ritz Carlton hotel grounds in the heart of the island paradise of Key Biscayne. Offering beach access/service, Ritz Carlton Tennis Club, Grand Bay Club, and 2 private pools with lovely outdoor gardens and scenic walking paths. Exceptional building with remodeled lobby, 24-hour concierge service, valet, a fitness center, conference/meeting room as well as being just steps away from shops and dining. Great floor plan, ample living dining areas, private elevator to foyer with double door entry, large bedrooms & plenty of closet space, three terraces, full size laundry room, 2 parking spaces + storage. World-class amenities and Key Biscayne lifestyle at its finest.
Features
- Entrance Foyer
- Split Bedroom
- Den/Library/Office
- Utility Room/Laundry
- Open Balcony
- Garden View
- Other View
Location
Approximate — shows the building, not the unit. Open in maps (opens in a new tab)
Estimated loan & HOA
Loan payment and HOA only. Property tax and insurance are significant here and are not included.
- Principal & interest
- $19,468
- HOA
- $4,336 / 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.