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Key Biscayne For Sale SINGLE FAMILY RESIDENCE

360 Harbor Ln, Key Biscayne FL 33149

360 Harbor Ln, Key Biscayne FL 33149

$9,950,000 ₿≈ ₿120.14

MLS A12104430 · 2 days on market

6

Beds

5.5

Baths

4,341

SQUARE FEET

Single Family Residence

Type

2025

Built

Listing courtesy of

Coldwell Banker Realty

Judith Zeder

MLS® #A12104430

Listing information last updated October 20, 2026

MiamiCityRealty.com is an agent's best friend. We proudly co-broke and partner with Coldwell Banker Realty — and every agent and broker in Miami — to get the deal done.

Overview

This single family residence in Key Biscayne has 6 bedrooms and 5.5 bathrooms across 4,341 square feet, and is listed for sale at $9,950,000 (about $2,292 per square foot). 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.

Listing history

Listed for sale

Oct 19, 2026 · MIAMI MLS

$9,950,000

Days on market

as of today

2 days

Building & financials

FROM MIAMI MLS

The carrying-cost and structural facts that close or kill a Miami deal — straight from the listing feed.

Annual property tax (2025)

$31,314

Association type

None

Pets

Allowed (verify restrictions)

Dues, taxes, and association data per MIAMI MLS and public records; flood zone from FEMA NFHL. Verify with the HOA, county, and your insurer during due diligence.

Property details

MLS #A12104430
Price$9,950,000
Size4,341 Square Feet
Bedrooms6
Bathrooms5.5
Year built2025
TypeSingle Family Residence
StatusFor Sale
Price / Square Feet$2,292

Features & amenities

Built-in Features
Built-In Grill
Closet Cabinetry
Den/Library/Office
Dishwasher
Disposal
Dryer
Electric Range
Entrance Foyer
Family Room
First Floor Entry
Has a View
Has Carport
Has Cooling System
Has Heating System
Lighting
Maid/In-Law Quarters
Microwave
Open Balcony
Open Parking
Other
Other Equipment/Appliances
Refrigerator
Utility Room/Laundry
Volume Ceilings
Walk-In Closet(s)
Wall Oven
Washer
Water Purifier

Location

360 Harbor Ln, Key Biscayne FL 33149

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Est. monthly payment

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Property tax (est.)—
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Questions, answered

How many bedrooms does this property have?

This Key Biscayne single family residence has 6 bedrooms.

How many bathrooms does this property have?

This Key Biscayne single family residence has 5.5 bathrooms.

What is the square footage?

This Key Biscayne single family residence offers 4,341 square feet of living space.

When was this property built?

This Key Biscayne single family residence was built in 2025.

What are the annual property taxes?

Annual property taxes for this Key Biscayne single family residence are approximately $31,314, per the latest tax record.

How long has this property been on the market?

This Key Biscayne single family residence has been on the market for 1 day.

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$9,950,000

360 Harbor Ln, Key Biscayne FL 33149

Key Biscayne · 6 bd · 5.5 ba · 4,341 Square Feet

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Listing data © MIAMI MLS · IDX information deemed reliable but not guaranteed · 2 days on market.

We do not advertise a “free” buyer’s agent; buyer-representation compensation is disclosed in writing. Bitcoin pricing is indicative and updates with the market — not financial, tax, or legal advice. Buyer to independently verify all measurements, assessments, and flood & insurance facts.

$9,950,000

6 bd · 5.5 ba · 4,341 Square Feet

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