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360 Harbor Ln Key Biscayne, FL $ 9,950,000
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360 Harbor Ln
$ 9,950,000
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360 Harbor Ln

Key Biscayne, FL, 33149
$ 9,950,000
Bedrooms6 Baths5.1 Sq 4,341

Monthly Estimate*

$ 68,722

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Single Family Home for sale in Key Biscayne, FL

for $9,950,000 with 6 bedrooms and 5 full baths, 1 half bath. This 4,341 square foot home was built in 2025.

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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Single Family Active

Price

$ 9,950,000

Bedrooms

6

Full Bath

5

Half Bath

1

Property Type

Single Family

Taxes

$ 31,314

Style

Year Built

2025

Town/City

Key Biscayne

County/Region

Miami-Dade

MLS | Web ID

A12104430
Features
General
Sewer Public Sewer
Heating Central Electric
Cooling Central Air Electric
Possession Closing & Funding
Roof Flat Tile
Appliances Built-In Oven Dryer Dishwasher Electric Range Disposal Microwave Other Refrigerator Wine Cooler Water Purifier Washer
Garage Spaces 0
Patio/Porch Features Balcony Deck Open
Architectural Style Contemporary/Modern Detached Two Story
Pool Features Heated In Ground Pool
Restrictions No Restrictions
Construction Materials Block Other
Pets Allowed No Yes
Year Built 2025
View Garden Pool
Stories Count 2
Levels Two
Property Subtype Single Family Residence
Tax Year 2025
County Miami-Dade
Property Type Residential
Subdivision Name BISCAYNE KEY ESTATES
Facing Direction Northeast
Garage Y/N false
Total Rooms 0
Full Baths 5
Status Active
High School Coral Gables
City Key Biscayne
Senior Community Y/N false
Zoning Description 0100
MLS Area 52
Lot Size Units Square Feet
Lot Size Square Feet 9300
Carport Spaces 2
Carport Y/N true
Listing Terms Cash Conventional
Elementary School Keybiscayne
Year Built Details Resale
Tax Annual Amount 31314
Middle/Junior High School Ponce De Leon
Lease Considered Y/N false
Virtual Tour https://www.propertypanorama.com/instaview/mia/A12104430
Standard Status Active
Occupancy Type Call Agent
Property Sub Type Additional Single Family Residence
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
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Interior
Interior Amenities Built-in Features Bedroom on Main Level Closet Cabinetry Dining Area Separate/Formal Dining Room Dual Sinks Entrance Foyer First Floor Entry High Ceilings Kitchen/Dining Combo Living/Dining Room Sitting Area in Primary Shower Only Upper Level Primary Walk-In Closet(s)
Flooring Hardwood Marble Wood
Furnished Y/N Unfurnished
Air Conditioning Y/N true
Heating Y/N true
Window Features Blinds Impact Glass
Half Baths 1
Total Bedrooms 6
Total Baths 6
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Exterior
Exterior Amenities Balcony Deck Security/High Impact Doors Lighting Outdoor Grill
Parking Features Attached Carport Driveway Paver Block
Lot Features Flood Zone Sprinklers Automatic Sprinkler System < 1/4 Acre
Water Source Public
Lot Size Area 9300
Spa false
Building Area Total 5156
Private Pool true
Waterfront Y/N false
Covered Spaces 2
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* Excluded Features
List By
Coldwell Banker Realty

Broker

judy@jillszeder.com

Email

Affordability Calculator

$71,332
Per Month
96%
4%
0%
Monthly Principal & Interest
$68,722
Monthly Property Taxes
$2,610
Monthly Home Insurance
--
Default based on a 30-year fixed rate of 7.375% with 20% down. The estimated payment is offered for convenience and is not an offer of credit. Due to market fluctuations, interest rates are subject to change at any time and without notice. Your individual rate may vary. Rates may differ for FHA, VA or jumbo loans.
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Nearby
3062566 Elementary School
4268812 Middle School
Coral Gables High School High School
See complete school information
Pricing History
Date Price Price Change Description
10/19/2026 $9,950,000 Listed Price

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360 Harbor Ln, Key Biscayne, FL, 33149 is a Single Family Home for sale at $9,950,000 with 4,341 sqft. 360 Harbor Ln has 6 bedrooms, 5.1 baths, and was built in 2025. The property's zip code is 33149 which is in Key Biscayne, FL

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