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Slice RealtyPropiedad Futura

$6,950,000

5 bd · 6 ba · 5,421 sq ft · Single Family Residence

685 Harbor Ln, Key Biscayne FL 33149

For Sale · Active listing

Est. payment $38,496/mo · Mortgage calculator

Listed by Avanti Way Realty LLC / Marisela Gonzalez Servat

Contact: 786-663-2842 (listing contact).

Shown through Slice Realty. Requests from this page reach Slice Realty / Propiedad Futura, not the listing agent.

About this home

Set on one of the largest lots in Key Biscayne, a rare 12,200 sqft parcel, this colonial-style residence, known as Villa Rosa, was designed by renowned architect Cesar Molina and sits on a quiet, low-traffic street in a well-established, family-friendly neighborhood. The generous lot allows for a spacious backyard with pool and abundant green space, ideal for outdoor living and entertaining. Double balconies and covered terraces create a seamless indoor-outdoor flow throughout the home. This 5-bedroom residence offers bright interiors and a chefs kitchen with island, Sub-Zero refrigerator, wine cooler, double ovens, and two dishwashers. The primary suite includes a private terrace, oversized walk-in closet with safe, and dual baths with sauna. Also includes maids quarters and hurricane code construction. Minutes from the beach, parks, and top schools - a rare opportunity to own a well-designed home with an exceptional lot on one of Key Biscayne's most desirable streets.

Facts
MLS #
A11997896
Subdivision
BISCAYNE KEY ESTATES
Property type
Residential
Property subtype
Single Family Residence
Sq. ft.
5,421
Price per sq. ft.
$1,282 / sq ft
Year built
2001
Days on market
180
County
Miami-Dade County
Date listed
Apr 16, 2026
Last updated
Oct 14, 2026
Financial considerations
Taxes
$40,335 (2025)
Exterior features
Waterfront
No
View
Other
Construction
Elevated Construction, Piling Construction
Roof
Aluminum
Additional features
Lighting, Open Balcony
Interior features
Heating
Central
Cooling
Central Air
Appliances
Dishwasher, Disposal, Dryer, Electric Water Heater, Ice Maker, Gas Range, Refrigerator
Window features
Hurricane Shutters, Impact Glass, Plantation Shutters
Additional features
First Floor Entry, Bar, Closet Cabinetry, Cooking Island, Entrance Foyer, Walk-In Closet(s), Family Room, Great Room, Storage
Additional features
Community
Beach Club Member Available

Mortgage calculator

Includes principal and interest, taxes and insurance.

Rate: Freddie Mac 30-year average (2026-10-15). Estimate only.

Loan amount$5,560,000
Total cost of mortgage$13,858,674
Monthly payment$38,496

Local context (our analysis)

Area stats are available for our covered neighborhoods. See neighborhoods.

Source: Southeast Florida MLS (SEFMLS). Last updated Oct 14, 2026, 11:14 AM ET

Listing data is deemed reliable but is not guaranteed accurate by the MLS. Information is provided for consumers' personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing.