Home in 360 Harbor Lane, Key Biscayne, FL 33149 for sale with MLS# A12104430

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.

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360 Harbor Lane, Key Biscayne, FL 33149

Price
Price:
$9,950,000.00
Original List Price:
$9,950,000.00
List Price per Sq Ft (Calculated, Approx.):
$2,292.09
Property Status and Type
Listing Type:
For Sale
Status:
Active
Listing Category:
Residential
Property Type:
Single Family House
Description of Last Important Update:
New Listing
Last Major Update on:
October 19, 2026 4:00 am
Other Special Conditions:
Property Survey Available
Rooms Distribution
Bedrooms:
6
Bathrooms Total:
6
Full Bath:
5
Half Bath:
1
Room Type:
Laundry, Other, Family Room, Den, Maid/in-law Quarters
Master Bedroom Bath:
Master Bdrm - Sitting, Master Bdrm - Upstairs, Separate Shower, Dual Sinks, Master Bdrm - Ground
Dining Area:
Formal Dining, Kitchen Dining, Dining/Living Room
Measures
Living Area:
4,341 Sqft
Built-Up Area:
5,156 Sqft
Lot Area:
9,300 Sqft
Lot Size Dimensions and Info:
9300
Lot Size Acres:
0.21
Property Features
View from the Property:
Pool, Garden
Waterfront:
No
Private Pool
Swimming Pool Features:
Heated, In Ground
Furnished:
Unfurnished
Appliances:
Dryer, Dishwasher, Disposal, Microwave, Refrigerator, Washer, Other, Electric Range, Water Purifier, Oven
Interior:
High Ceilings, Walk-In Closet(s), Closet Cabinetry, Entrance Foyer, Built-in Features, Other
Exterior:
Balcony, Lighting, Built-in Barbecue
Patio and Porch:
Deck
Windows:
Blinds
Air Conditioning
Air Conditioning System:
Central Air, Electric
Heating
Heating System:
Central, Electric
Property Entrance Faces:
Northeast
Other Equipment:
Other
Unit Description:
Studio
Balcony Details:
Balcony - Open
Storm Protection Impact Glass:
Complete
Sprinkler Description:
Auto Sprinkler, City Sprinkler System
Construction
Year Built:
2025
Roof:
Flat, Tile
Architectural Style:
Contemporary
Levels:
Two
Entry Level (floor):
1
Construction Materials:
Block, Other
Flooring:
Wood, Marble
Number of stories:
2
Flood Zone Code:
AE
Property Condition:
Resale
Taxes and Expenses
Tax Annual Amount:
$31,314.00
Tax Year:
2025
Property Tax Details:
City/County, Tax Reflects No Exemptions
Parking
Garage Spaces:
0
Carport Spaces:
2
Covered Spaces:
2
Parking Features:
Driveway, Paver Block, Attached Carport, Carport
Carport
Utilities
Sewer:
Public Sewer
Water Source:
Public
Community
Pets Allowed?
Subdivision Name:
BISCAYNE KEY ESTATES
Senior Community:
No
Restrictions:
No Restrictions
Terms
Listing Terms Considered by Seller:
Cash, Conventional
Buyer Possession:
Negotiable
Zoning and Legal
Tax Legal Description:
5 & 6 55 42 BISCAYNE KEY ESTS PB 50-61 LOT 3 BLK 10 LOT SIZE 8000 SQ FT OR 12488-3411 0485 4 COC 24947-2228 09 2006 5
Real Estate Folio Number (Parcel Number):
2452050011490
Zoning:
0100
Public Schools Assigned
Elementary School:
Key Biscayne K-8
High School:
Coral Gables
Middle Or Junior School:
Ponce De Leon
Listing History
Active on the market since:
October 19, 2026
Listing Agreement executed on:
October 19, 2026
Listing Status Last Changed On:
October 19, 2026 4:00 am
Photos updated on:
October 19, 2026 2:00 pm
Last Modified:
October 19, 2026 3:07 pm
Additional Information
Courtesy of:
Coldwell Banker Realty
Attribution:
Not provided
Location
Street Name:
Harbor
Street Number:
360
City:
Key Biscayne
State:
Florida
Zip Code:
33149
County:
Miami-Dade
Latitude:
N25° 41' 18.8''
Longitude:
W81° 49' 40.9''
Street Suffix:
Lane
Property Map

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Neighborhood Stats

Source: U.S. Census Bureau, ACS 5-Year Estimates

Median Household Income $171,982
Median Home Value $1,231,500
Median Rent $3,501/mo
Median Age 43
Population 14,628
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Association of REALTORS®
Disclaimer: IDX listing information is presented by Rebonus Brokerage LLC for consumer informational purposes only. The information provided is 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. Data is deemed reliable but is not guaranteed by the MLS or the real estate broker. This page presents structured listing information sourced directly from the MLS via the RESO Web API feed. Rebonus prioritizes maximum field coverage and data completeness, displaying the most granular MLS-provided attributes available.