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Waterfront · Condominium
$3,950,000$1,215 / sqft
445 Grand Bay Dr # 104, Key Biscayne FL 33149
Listed
4
Bedrooms
5
Bathrooms
3,250 sqft
Interior
1996
Year built
$3,888 / mo
HOA
Condominium
Type
About this home
An exceptional corner lanai at Grand Bay Residences, offering the space and privacy of a single-family home with the ease of full-service oceanfront living. This beautifully renovated 4-bedroom, 4.5-bath residence spans 3,250 SF with bright, open interiors, expansive windows overlooking lush tropical greenery, and three generous private terraces. One terrace sits just steps from the pool and beach, creating a seamless setting for outdoor dining and entertaining. The state-of-the-art kitchen features Sub-Zero and Wolf appliances, an oversized eat-in island, a breakfast area, and a versatile dining/family room. All four bedrooms are en suite, complemented by modern baths, abundant closet space, and elegant plantation shutters throughout. Enjoy tennis, pool, fitness facilities, attentive service, and 24-hour security within this gated Key Biscayne community on the newly renovated Ritz-Carlton grounds. A distinctive residence combining house-like proportions and privacy with the conveniences of luxury oceanfront living.
Features
- First Floor Entry
- Closet Cabinetry
- Cooking Island
- Fire Sprinklers
- French Doors
- Den/Library/Office
- Maid/In-Law Quarters
- Storage
- Utility Room/Laundry
- Open Balcony
Run the numbers
We fill in the price and the building's HOA dues. That leaves tax, insurance and maintenance — they depend on your exemptions, your insurer and the unit, so we don't guess them. Rent starts from what comparable units are asking nearby. Vacancy and the loan terms below start at common defaults; change them.
Median asking rent for 4-bed rentals across Miami-Dade, from 123 active listings; the middle half ask $15,000–$37,000.That is what landlords ask, not what units let for — edit it if you know better.
Our default, not a market figure
From the listing
Depends on assessed value & exemptions
Varies widely by building
Repairs, turnover, management
Cap rate
Cash-on-cash
Monthly cash flow
Net operating income
Enter 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. We are not a lender and neither offer nor arrange financing. 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.