BreakThru Realty

425 Harbor Drive, Key Biscayne, FL 33149

$7,450,000 · Active

  • 7 beds
  • 8 baths
  • 4,565 sq ft
  • 149 days on market
  • Single Family Residence
  • Built 2020
  • Lot 9,147.6 sq ft
  • 6,092 sq ft total
  • 1 garage space
  • Miami-Dade County
  • MLS# A12034564
  • Tropical Isle Homes Sub 3
Photo 1 at 425 Harbor Drive, Key BiscaynePhoto 2 at 425 Harbor Drive, Key BiscaynePhoto 3 at 425 Harbor Drive, Key BiscaynePhoto 4 at 425 Harbor Drive, Key BiscaynePhoto 5 at 425 Harbor Drive, Key BiscaynePhoto 6 at 425 Harbor Drive, Key BiscaynePhoto 7 at 425 Harbor Drive, Key BiscaynePhoto 8 at 425 Harbor Drive, Key Biscayne

About this home

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.

Features

  • Built-in Features
  • Elevator
  • High Ceilings
  • Kitchen Island
  • Walk-In Closet(s)
  • Closet Cabinetry
  • Storage
  • Built-in Barbecue
  • Outdoor Shower
  • Balcony
  • Heated
  • In Ground

Schools

  • Elementary: Key Biscayne K-8
  • Middle: Ponce De Leon
  • High: Coral Gables

Presented by

BreakThru Realty · (786) 914-1017

Courtesy of

One Sotheby's International Realty · MLS@onesothebysrealty.com · Listing agent: Mark P Chatburn

BeachesMLS logo 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. 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 BeachesMLS. Listings held by brokerage firms other than BreakThru Realty carry the name of the listing broker.

Schedule a showing

Call or text BreakThru Realty at (786) 914-1017 or email sales@breakthrurealty.com to see 425 Harbor Drive.

Before You Make an Offer

How buying a home in South Florida works

Your Buyer May Already Be Working With BreakThru Realty

Buyers come to BreakThru Realty searching for homes like this one, and many have shared their exact requirements with us: the neighborhood, the price, the bedrooms, the pool, the timing. If you own a home nearby and are weighing a sale, a broker can check it against those requirements before you list, and if no buyer on file fits, show you how we would reach the rest of the market.

BreakThru Realty works with hundreds of prequalified buyers searching for properties. Before you list, a broker reviews what you own, the market around it and whether an existing buyer's requirements match. If none does, you see how we would position it to reach other qualified buyers.

Find Out If We Have Your Buyer · Discuss Selling With BreakThru Realty

A potential match is a conversation, not an offer, until the buyer sees your property and makes one. No buyer is named and nothing about your property or business is shared until you decide to proceed.

Questions About 425 Harbor Drive

How much is 425 Harbor Drive?
425 Harbor Drive is listed at $7,450,000, which is about $1,632 per square foot. The listing page shows comparable active listings and recent closed sales nearby so you can judge the asking price against what buyers have actually paid.
What are the property taxes on 425 Harbor Drive?
The listing reports annual property taxes of $89,673 for 2025. Taxes are reassessed at the sale price after a purchase, so a new owner's bill can differ from the current owner's; use the mortgage calculator on this page for an estimate.
When was 425 Harbor Drive built?
425 Harbor Drive was built in 2020. Age matters for insurance and financing in Florida: ask about the roof, the electrical panel and, for a condo built before the current code, the building's structural reserve study.
How long has 425 Harbor Drive been on the market?
425 Harbor Drive has been listed for 149 days. Days on market and price changes are the first signals of how much room there is to negotiate.
Which schools serve 425 Harbor Drive?
The MLS lists Key Biscayne K-8 (elementary), Ponce De Leon (middle), Coral Gables (high). School assignments are set by the district and can change; verify them with the school board before you rely on them.
How do I see 425 Harbor Drive?
Request a showing from this page or call BreakThru Realty and a licensed agent will arrange a private tour, in person or by video, and answer anything the listing leaves out.

To request a tour, call (786) 914-1017 or email sales@breakthrurealty.com.

Explore

Similar Homes Nearby

Recently Sold Nearby

Explore Nearby

Nearby Cities

More Key Biscayne Neighborhoods

Nearby ZIP Codes

The 5 bedroom home at 501 Bay Lane, Key Biscayne, FL 33149 is comparable and listed for sale at $5,990,000. Another comparable home, 165 Hampton Lane, Key Biscayne, FL 33149, sold for $7,767,500 in October 2026. Other Key Biscayne neighborhoods include Ocean Club and Biscayne Key Estates. Nearby ZIP codes include 33131 and 33129. This property also neighbors Brickell, Miami, and Coconut Grove. Compare it with the Key Biscayne housing market report.