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Slice RealtyPropiedad Futura

$9,950,000

6 bd · 6 ba · 4,341 sq ft · Single Family Residence

360 Harbor Ln, Key Biscayne FL 33149

For Sale · Active listing

Est. payment $55,113/mo · Mortgage calculator

Listed by Coldwell Banker Realty / Judith Zeder

Contact: 786-822-0989 (listing contact).

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

About this home

Discreetly set in the heart of Key Biscayne — one of Miami’s most coveted island communities — this elegant modern two-story residence offers 5,156 SF of total space on a lush 9,300 SF lot with 6 bedrooms, 5.5 bathrooms, and a private office, perfectly balancing refined design with the relaxed island lifestyle. A travertine staircase entry and wrap-around porch with modern glass railings set a sophisticated tone, leading inside to soaring ceilings, herringbone oak floors by Listone Giordano, floor-to-ceiling sliding doors, and Lutron lighting. The open-concept living, dining, and family areas flow seamlessly to the outdoors. The chef’s kitchen showcases a striking fluted marble island with curved-edge countertops, floor-to-ceiling cabinetry by Design It, and a full Wolf and Sub-Zero appliance suite. The primary suite features a private terrace, dual custom walk-in closets, a dry sauna, and a show-stopping bath with aquamarine quartzite sourced from ARCA, dual Waterworks vanities, and a frameless glass shower. Outside, a covered terrace with fluted wood-paneled ceiling, summer kitchen with built-in grill and pizza oven, and a heated saltwater pool with marble deck and Baja ledge create the ultimate island retreat. Professionally designed landscaping and enchanting exterior uplighting illuminate the lush gardens, creating picturesque views through the home’s expansive glass walls, particularly after sunset. Integrated sound and four AC units complete this exceptional offering.

Facts
MLS #
A12104430
Subdivision
BISCAYNE KEY ESTATES
Property type
Residential
Property subtype
Single Family Residence
Sq. ft.
4,341
Price per sq. ft.
$2,292 / sq ft
Year built
2025
Days on market
1
County
Miami-Dade County
Date listed
Oct 19, 2026
Last updated
Oct 20, 2026
Financial considerations
Taxes
$31,314 (2025)
Exterior features
Waterfront
No
View
Garden, Pool
Construction
Concrete Block Construction, Other
Roof
Flat Tile
Additional features
Built-In Grill, Lighting, Open Balcony
Interior features
Furnished
Unfurnished
Heating
Central, Electric
Cooling
Central Air, Electric
Appliances
Dishwasher, Disposal, Dryer, Electric Range, Microwave, Other Equipment/Appliances, Water Purifier, Refrigerator, Wall Oven, Washer
Window features
Clear Impact Glass, Complete Impact Glass, Blinds, High Impact Windows, Impact Glass
Additional features
First Floor Entry, Built-in Features, Closet Cabinetry, Entrance Foyer, Other, Volume Ceilings, Walk-In Closet(s), Den/Library/Office, Family Room, Maid/In-Law Quarters, Utility Room/Laundry
Additional features
Community
None

Mortgage calculator

Includes principal and interest, taxes and insurance.

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

Loan amount$7,960,000
Total cost of mortgage$19,840,836
Monthly payment$55,113

Local context (our analysis)

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

Source: Southeast Florida MLS (SEFMLS). Last updated Oct 20, 2026, 2:33 PM 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.