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425 Harbor Dr, Key Biscayne, FL 33149

$7,450,000

· $1,632/sqft · Est. $41,863/mo

7 bd · 7 ba + 2 half · 4,565 sqft · MLS# A12034564

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Seller's Disclosure

Property Survey

Floor Plan

Comparative Market Analysis

About 425 Harbor Dr, Key Biscayne, FL 33149

Listing details for 425 Harbor Dr, Key Biscayne, FL 33149: Discover this striking contemporary residence, perfectly positioned on an oversized 9,258 SF lot on Harbor Drive, one of Key Biscayne’s most elegant and prestigious streets. Built in 2020, this architectural masterpiece offers 6 bedrooms plus a private office, 7 full baths, and 2 powder rooms across 4,565 SF of beautifully designed living space. Filled with natural light, the home showcases expansive open living areas, impressive volume throughout, and a sleek custom kitchen featuring bespoke cabinetry and top-of-the-line finishes. An elevator provides seamless access to all three levels, culminating in a spectacular rooftop terrace with captivating island views and refreshing bay breezes…a unique advantage of being just moments from the water. Designed for effortless indoor-outdoor living, the exterior features a resort-style saltwater pool and spa, summer kitchen, cabana bath, and generous entertaining areas surrounded by lush tropical landscaping. Additional highlights include , EV charger, and ample driveway parking. Combining exceptional design, comfort, and functionality, this residence embodies the very best of island living in one of Key Biscayne’s most distinguished locations. Just minutes from Miami, Key Biscayne is a hidden island paradise where pristine beaches, world-class outdoor recreation, and a relaxed yet sophisticated lifestyle come together in a way that few places can match.

Bedrooms

7

Bathrooms

7 full · 2 half

Square Feet

4,565

Year Built

2020

Garage

1 space

HOA

No

Taxes

—

Property Details for 425 Harbor Dr, Key Biscayne, FL 33149

MLS# A12034564 · Source: MIAMI + RWorld

Interior

Bedrooms & Bathrooms

  • Bedrooms: 7
  • Full Baths: 7
  • Half Baths: 2

Heating & Cooling

  • Heating: Central, Electric
  • Cooling: Central Air

Interior Features

  • Flooring: Hardwood, Wood
  • Has Fireplace: No

Interior Area

  • Total Interior Livable Area: 4,565 sqft

Property

Parking

Garage Spaces
1

Details

Zoning
0100

Construction

Type & Style

Property Type
Residential
Architectural Style
Single Family Residence

Materials

Construction Materials
Block
Roof
Flat
Foundation
Raised

Condition

New Construction
No
Year Built
2020

Utilities & Green Energy

Water Source
Public
Sewer
Public Sewer

Community & HOA

Community

Subdivision
Tropical Isle Homes Sub 3

Financial & Listing Details

Price per Sq Ft
$1,632/sq ft
Date on Market
Jun 12, 2026
MLS Number
A12034564
Listed By
One Sotheby's International Realty

Tropical Isle Homes Sub 3

Tropical Isle Homes Sub 3 is a neighborhood in Key Biscayne.

Location of 425 Harbor Dr, Key Biscayne, FL 33149

Street Address
425 Harbor Dr
City
Key Biscayne
ZIP Code
33149
Neighborhood
Tropical Isle Homes Sub 3
County
Miami-Dade County
In Tropical Isle Homes Sub 3

Map unavailable for this listing

Estimated monthly

30-yr fixed

$41,863

/mo

$7,450,000 · 20% down · 7.16%

Principal & interest

$40,311

Home insurance

$1,552

Home price

$7,450,000

Down payment

$1,490,000 · 20%

Interest rate

7.16%

Estimates only. Actual costs vary by lender, credit score, and market conditions.

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Frequently Asked Questions About 425 Harbor Dr

How much is 425 Harbor Dr, Key Biscayne, FL 33149 listed for?

425 Harbor Dr, Key Biscayne, FL 33149 is currently listed at $7,450,000. That works out to approximately $1,632 per square foot.


This property features 7 bedrooms, 7 full and 2 half bathrooms, 4,565 sq ft of living space.


Based on current MLS data, no HOA fee is listed for this property. We recommend confirming with the seller's disclosure or your agent, as some communities charge fees not reflected in MLS.


425 Harbor Dr, Key Biscayne, FL 33149 is located in Key Biscayne, FL 33149. School assignments are set by the county school board and can change. Verify with the county school district before enrolling.


425 Harbor Dr, Key Biscayne, FL 33149 is situated in the Tropical Isle Homes Sub 3 neighborhood of Key Biscayne, Florida. Scroll to the Location section on this page for a map and nearby places.

Information is provided for general guidance only and is subject to change. Always verify with your agent or licensed professional.

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Listing Information & Disclaimer

Listed By: One Sotheby's International Realty

MLS #: A12034564MLS Source: MIAMI + RWorldListing Last Updated: Sep 17, 2026

MIAMI + RWorld

All listings featuring the BMLS logo are provided by BeachesMLS, Inc. This information is not verified for authenticity or accuracy and is not guaranteed. Copyright ©2026 BeachesMLS, Inc.

Listing information is provided in part by the MIAMI + RWorld Internet Data Exchange program. IDX information is provided exclusively 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 accurate by the MLS. Data last updated Nov 13, 2026 5:18 PM. Equal Housing Opportunity.

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425 Harbor Dr, Key Biscayne, FL 33149$7,450,000