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Single family home for sale at 360 Harbor Ln, Key Biscayne, FL 33149 | MLS# A12104430 | Listing updated on 2026-10-31
Photo 1 of Single family home for sale at 360 Harbor Ln, Key Biscayne, FL 33149 | MLS# A12104430 | Listing updated on 2026-10-31
Photo 2 of Single family home for sale at 360 Harbor Ln, Key Biscayne, FL 33149 | MLS# A12104430 | Listing updated on 2026-10-31
Photo 3 of Single family home for sale at 360 Harbor Ln, Key Biscayne, FL 33149 | MLS# A12104430 | Listing updated on 2026-10-31
Photo 4 of Single family home for sale at 360 Harbor Ln, Key Biscayne, FL 33149 | MLS# A12104430 | Listing updated on 2026-10-31
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$9,950,000

Monthly Est:$49,525

  • Beds Icon6 Beds
  • Beds Icon
    6 Baths
  • Beds Icon4,341sqft

360 Harbor Ln, Key Biscayne, FL 33149

$49,525/moEst:

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  • Single Family Residence

  • Built in 2025

  • $-- HOA

  • 9,147.6 sqft lot

  • $2,292/sq.ft

Description

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.

  • Houzeo last checked: 1 minute ago
  • Listing updated: October 31, 2026 at 2:25 am
  • Listing Provided by: Judith H Zeder (305) 613-5550 DRE #0650944, Daniel Hertzberg (786) 789-3507 DRE #3212309 | Coldwell Banker Realty (305) 667-4815
  • Source: Beaches MLS-FL | MLS#: A12104430 Beaches MLS-FL

Property Details

  • Status

    Active

  • Type

    Single Family Residence

  • No. of Stories

    2

  • County

    Miami Dade County

  • City

    Key Biscayne

  • Neighborhood

    --

  • Year Built

    2025

  • HOA Fees

    -

  • Finished Area

    4,341 sqft

  • Lot Size

    9,147.6 sqft lot

  • Basement Area

    - sqft

  • MLS Name

    Beaches MLS

  • MLS Number

    A12104430

  • MLS Status

    Active

  • Days on Market

    12

  • Cumulative Days on Market

    11

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Location

Facts & Features

Rooms

  • Bedrooms & bathrooms

    Bedrooms: 6

    Bathrooms: 6

Interior

  • Sewer

    Public Sewer

  • Window Features

    Blinds

  • Interior Features

    Built In Features, Closet Cabinetry, Dining Area, Separate Formal Dining Room, Dual Sinks, Entrance Foyer, High Ceilings, Kitchen Dining Combo, Living Dining Room, Main Level Primary, Other, Sitting Area In Primary, Separate Shower, Upper Level Primary, Walk In Closets

  • Flooring

    Marble, Wood

  • Heating

    Central, Electric

  • Appliances

    Dryer, Dishwasher, Electric Range, Disposal, Microwave, Oven, Refrigerator, Water Purifier, Washer

  • Exterior Features

    Built In Barbecue, Balcony, Barbecue, Lighting, Outdoor Living Area

  • Cooling

    Central Air, Electric

Construction

  • Year Built

    Year Built: 2025

  • Home type

    Single Family Residence

  • Construction Materials

    Block, Other

  • Property Condition

    Resale

  • Architectural Style

    Contemporary

  • Roof

    Flat, Tile

Utilities & Energy

  • Pool Features

    Heated, In Ground

  • Parking Features

    Attached Carport, Carport, Driveway, Paver Block

  • Water Source

    Public

  • Association Amenities

    None

Other Features

  • Lot Features

    Sprinklers Automatic, Sprinkler System

  • Patio And Porch Features

    Deck, Open, Balcony

  • Subdivision Name

    Biscayne Key Estates

Price History

DateEventPrice

10/19/2026

Source: #A12104430

Off Market

$9,950,000

$2,292/sqft

10/10/2026

Source: #A12104430

Listed for Sale

$9,950,000 +565.55%

$2,292/sqft

02/28/2018

Source: #A10389688

Off Market

$1,495,000

$344/sqft

02/28/2018

Source: #A10389688

Sold

$1,495,000 +21.05%

$344/sqft

02/01/2018

Source: mls_logoBeaches MLS-FL #A10389688

Price Decreased

$1,235,000 -17.39%

$284/sqft

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Getting Around 360 Harbor Ln

Bike Score®

Bike Score

Somewhat Bikeable

48/100

Walk Score®

Walk Score

Car-Dependent

27/100

Data provided by Redfin

Nearby Homes

IDX information is provided exclusively for consumers’ personal, non-commercial use, that it may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing, and that the data is deemed reliable but is not guaranteed accurate by BeachesMLS. All listings featuring the BMLS logo are provided by BeachesMLS, Inc. This data is not verified for authenticity or accuracy and may not reflect all real estate activity in the market. Based on information © 2026 BeachesMLS, Inc. All Rights Reserved.

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