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Waterfront · Single Family Residence
$9,500,000$2,790 / sqft
861 Harbor Dr, Key Biscayne FL 33149
Listed
5
Bedrooms
4
Bathrooms
3,405 sqft
Interior
1963
Year built
None
HOA
Single Family Residence
Type
About this home
welcome to Key Biscayne. You cannot dream of a most perfect home with only good vibes and a twist of Saint Barth One story Beach house home style, with 5 bedrooms. Open kitchen, large reception area and inviting covered terrace overlooking pool and gazebo . Light grey color floors, open kitchen with countertop overlooking garden and pool. Perfectly appointed and elegant decoration. Family room, formal dining, 3 bedrooms on left wing of the house and 2 additional bedrooms on right wing of the house. Laundry area. Staff quarter. Cabana bath. Family, guests and friends adore to spend quality time in this unique home. Circular driveway .Please call for additional pictures
Features
- First Floor Entry
- Built-in Features
- Entrance Foyer
- Pantry
- Split Bedroom
- Walk-In Closet(s)
- Den/Library/Office
- Family Room
- Maid/In-Law Quarters
- Utility Room/Laundry
- Lighting
- Canal
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 5-bed rentals in Key Biscayne, from 9 active listings; the middle half ask $22,000–$40,000.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.