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MLS #A12104430 image #0
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.
Current real estate data for Single Family in Key Biscayne as of Oct 31, 2026
41
Single Family Listed
146
Avg DOM
2,613
Avg $ / SqFt
$14,295,512
Avg List Price
Listing Provided Courtesy of Coldwell Banker Realty at 305-667-4815

Property Details

Price:
$9,950,000
MLS #:
A12104430
Status:
Active
Beds:
6
Baths:
5.5
Type:
Single Family
Subtype:
Single Family Residence
Subdivision:
BISCAYNE KEY ESTATES
Neighborhood:
2520
Listed Date:
Oct 19, 2026
Finished Sq Ft:
4,341
Total Sq Ft:
5,156
Lot Size:
405,108,000 sqft / 0.21 acres (approx)
Year Built:
2025
ContemporaryPoolNewconstructionBiscayne Key EstatesKey Biscayne K-8Ponce De LeonCoral GablesPets Allowed

Schools

Elementary School:
Key Biscayne K-8
Middle School:
Ponce De Leon
High School:
Coral Gables

Interior

Appliances
Dishwasher, Disposal, Dryer, Electric Range, Microwave, Oven, Refrigerator, Washer, Water Purifier, Other
Bathrooms
5 Full Bathrooms, 1 Half Bathroom
Cooling
Central Air, Electric
Flooring
Marble, Wood
Heating
Central, Electric
Interior Features
Built-in Features, Closet Cabinetry, Entrance Foyer, High Ceilings, Walk-In Closet(s), Other
Levels
Two

Exterior

Architectural Style
Contemporary
Association Amenities
None
Construction Materials
Block, Other
Covered Spaces
2
Direction Faces
Northeast
Exterior Features
Balcony, Built-in Barbecue, Lighting
Parking Features
Attached Carport, Carport, Driveway, Paver Block
Patio And Porch Features
Deck
Roof
Flat, Tile
View
Garden, Pool
Window Features
Blinds

Financial

Tax Year
2025
Taxes
$31,314

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Community

Property Summary

    Located in the BISCAYNE KEY ESTATES subdivision, 360 Harbor Lane Key Biscayne FL is a Single Family for sale in Key Biscayne, FL, 33149. It is listed for $9,950,000 and features 6 beds, 6 baths, and has approximately 4,341 square feet of living space, and was originally constructed in 2025. The current price per square foot is $2,292. The average price per square foot for Single Family listings in Key Biscayne is $2,613. The average listing price for Single Family in Key Biscayne is $14,295,512. To schedule a showing of MLS#a12104430 at 360 Harbor Lane in Key Biscayne, FL, contact your Trust House Realty agent at 9543362003.

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