360 Harbor Ln Key Biscayne FL 33149 | MLS #A12104430

360 Harbor Ln
Key Biscayne, FL, 33149
$9,950,000
6 Beds
5.5 Baths
4,341 SqFt
0 Acres
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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.

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:
biscaynekeyestates
Listed Date:
Oct 19, 2026
Finished Sq Ft:
4,341
Total Sq Ft:
5,156
Year Built:
2025
PoolNewconstructionBiscayne Key EstatesBiscaynekeyestatesBiscayne Key EstatesKeybiscaynePonce De LeonCoral GablesNo Restrictions

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Schools

Elementary School:
Keybiscayne
Middle School:
Ponce De Leon
High School:
Coral Gables

Interior

Appliances
Dishwasher, Disposal, Dryer, Electric Range, Microwave, Other Equipment/Appliances, Water Purifier, Refrigerator, Wall Oven, Washer
Bathrooms
5 Full Bathrooms, 1 Half Bathroom
Cooling
Central Air, Electric
Flooring
Marble, Wood
Heating
Central, Electric
Interior 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
Laundry Features
Utility Room/Laundry

Exterior

Architectural Style
Detached, Two Story, Modern/Contemporary
Community Features
None
Construction Materials
Concrete Block Construction, Other
Covered Spaces
2
Direction Faces
Northeast
Exterior Features
Built-In Grill, Lighting, Open Balcony
Lot Features
Less Than 1/4 Acre Lot
Open Parking YN
1
Parking Features
Attached Carport, Driveway, Paver Block
Patio And Porch Features
Deck, Open Balcony
Roof
Flat Tile
View
Garden, Pool
Window Features
Clear Impact Glass, Complete Impact Glass, Blinds, High Impact Windows, Impact Glass

Financial

Tax Year
2025
Taxes
$31,314

Map

Community

Market Summary

Current real estate data for Single Family in Key Biscayne as of Oct 29, 2026
41
Single Family Listed
160
Avg DOM
2,636
Avg $ / SqFt
$14,400,415
Avg List Price

Property Summary

    Located in the BISCAYNE KEY ESTATES subdivision, 360 Harbor Ln 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 $2,636. The average listing price for Single Family in Key Biscayne is $14,400,415. To schedule a showing of MLS#a12104430 at 360 Harbor Ln in Key Biscayne, FL, contact your CENTURY 21 Carioti agent at 2392986550.

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