MIAMI LUXHomes

685 Harbor Ln, Key Biscayne, FL 33149

$6,950,0005 Beds6 Baths5,421 Sq. Ft.$1,282 / sq. ft.

Key Biscayne, FL 33149 · BISCAYNE KEY ESTATES

Status
Active
Type
Single Family Residence
Year Built
2001
Days on Market
145
Lot Size
9,000 sqft
MLS #
A11997896
County
Miami-Dade County

About 685 Harbor Ln, Key Biscayne, FL 33149

Set on one of the largest lots in Key Biscayne, a rare 12,200 sqft parcel, this colonial-style residence, known as Villa Rosa, was designed by renowned architect Cesar Molina and sits on a quiet, low-traffic street in a well-established, family-friendly neighborhood. The generous lot allows for a spacious backyard with pool and abundant green space, ideal for outdoor living and entertaining. Double balconies and covered terraces create a seamless indoor-outdoor flow throughout the home. This 5-bedroom residence offers bright interiors and a chefs kitchen with island, Sub-Zero refrigerator, wine cooler, double ovens, and two dishwashers. The primary suite includes a private terrace, oversized walk-in closet with safe, and dual baths with sauna. Also includes maids quarters and hurricane code construction. Minutes from the beach, parks, and top schools - a rare opportunity to own a well-designed home with an exceptional lot on one of Key Biscayne's most desirable streets.

How This Listing Compares in Key Biscayne

Per square foot, it is asking 32% above the Key Biscayne median for sales closed over the last twelve months — typical of premium views, newer construction or a top-tier building.

This homeKey Biscayne median (12 mo)
Price per sq. ft.$1,282$969
5-bedroom price$6,950,000$5,477,500
Days on market14561

Medians from closed MLS sales in Key Biscayne; a starting point, not an appraisal.

Home Features at 685 Harbor Ln, Key Biscayne, FL 33149

Bathrooms Full
5
Bathrooms Half
1
Interior Features
First Floor Entry, Bar, Closet Cabinetry, Cooking Island, Entrance Foyer, Walk-In Closet(s), Family Room, Great Room, Storage
Appliances
Dishwasher, Disposal, Dryer, Electric Water Heater, Ice Maker, Gas Range, Refrigerator
Flooring
Marble, Tile, Wood
Heating
Central
Cooling
Central Air
Architectural Style
Attached, Two Story
Garage Spaces
1
Attached Garage
Yes
Parking Features
Driveway
Pool Features
In Ground
Pool Private
No
Year Built Details
Resale
Property Condition
Piling Construction
Direction Faces
Northwest

The Building at 685 Harbor Ln, Key Biscayne, FL 33149

Building Name
BISCAYNE KEY ESTATES
Building Area Total
6971
Building Area Units
Square Feet
Association
No

Lot, Views & Construction at 685 Harbor Ln, Key Biscayne, FL 33149

Lot Features
1/4 To Less Than 1/2 Acre Lot
Lot Size Square Feet
9,000
Waterfront
No
View
Other
Construction Materials
Elevated Construction, Piling Construction
Roof
Aluminum
Exterior Features
Lighting, Open Balcony
Sewer
Public Sewer
Water Source
Municipal Water
New Construction
No

Taxes & Public Record for 685 Harbor Ln, Key Biscayne, FL 33149

Parcel Number
24-52-05-001-1330
Tax Annual Amount
$40,335
Tax Year
2,025
Tax Legal Description
5 & 6 55 42 BISCAYNE KEY ESTS PB 50-61 LOT 23 BLK 9 LOT SIZE 9000 SQ FT OR 14097-1199 0489 1
Zoning
0100
County Or Parish
Miami-Dade County

Assigned Schools for 685 Harbor Ln, Key Biscayne, FL 33149

Elementary School
Keybiscayne
Middle School
Ponce De Leon
High School
Coral Gables

School assignments are provided by the listing and should be independently verified.

Map & Neighborhood

685 Harbor Ln, Key Biscayne, FL 33149 · More homes in Key Biscayne

Courtesy of Avanti Way Realty LLC

Comparable Listings in Key Biscayne

685 Harbor Ln, Key Biscayne, FL 33149 at a Glance

Offered for sale in Key Biscayne 33149, 685 Harbor Ln is a single family home with 5 bedrooms, 6 bathrooms, about 5,421 square feet of living space, dating to 2001. The asking price is $6,950,000, on the market since April 16, 2026, with Avanti Way Realty LLC as the listing brokerage. Students here are assigned to Keybiscayne, Ponce De Leon and Coral Gables. Ask Matthew Gromadzki for a private showing, the full disclosure package, or comparable sales before you make an offer.