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685 Harbor Ln, Key Biscayne FL 33149

House For Sale
$6,950,000

BTC: 110.31746032

ETH: 3,980.52691867

49 days
5 bds
5 ba
5,421 sqft

Overview

Timeless colonial-style residence, also known as Villa Rosa, set on a rare 12,200 sqft lot in the heart of Key Biscayne. Designed by renowned architect Cesar Molina, this 5-bedroom home is located on a very quiet, low-traffic street, offering privacy within a well-established, family-friendly neighborhood. The home features double balconies, bright interiors, and a functional indoor-outdoor layout with expansive covered terraces. The kitchen includes an island, Sub-Zero refrigerator, wine cooler, double ovens, and two dishwashers. The primary suite offers a private terrace, oversized walk-in closet with safe, and dual bathrooms with sauna. The spacious backyard includes a pool and generous green space. Additional features include maid’s quarters and construction that meets hurricane code requirements. Ideally located near beaches, parks, and top-rated schools, this is a rare opportunity to own a well-designed home on one of Key Biscayne’s most desirable streets.

Location

Details

Type:
Residential
Parking:
Driveway
Year Built:
2001
Lot:
9000 Square Feet
Heating:
Central
Price/sqft:
$1,282
Cooling:
Central Air
HOA:
No Data

Valuation

Our model vs. what's actually selling nearby.
Estimate
$1,395,000
$791K – $7.1M
Confidence Low
List vs. estimate
$5.6M above estimate
List $6,950,000 · +398.2%
Our model says this listing is priced above recent comparable activity. Room to negotiate.
Price per sq ft
$1,282
-33.4% vs. city median $1,925
Based on
7 MLS comparables
+ 30 public-records sales within 0.5 mi
Median actual sale: $3.7M
Median of recent comparable listings. Sold comps use closing price, active listings use list price.

Highlights

Annual tax
$40,335
2025
Pool
In Ground
View
Other
Garage
1 car garage
All facts and features
  • Flooring

    • Marble

    • Tile

    • Wood

    Heating

    • Central

    Cooling

    • Central Air

    Appliances

    • Dishwasher

    • Disposal

    • Dryer

    • Electric Water Heater

    • Ice Maker

    • Gas Range

    • Refrigerator

    Other interior features

    • First Floor Entry

    • Bar

    • Closet Cabinetry

    • Cooking Island

    • Entrance Foyer

    • Walk-In Closet(s)

    • Family Room

    • Great Room

    • Storage

    Bedrooms and bathrooms

    • Bedrooms: 5

    • Bathrooms: 1

    • Full bathrooms: 5

  • Parking

    • Driveway

    Property

    • Exterior Features: Lighting / Open Balcony

    Lot

    • Lot: 9000 Square Feet

    Other Property Information

    • Parcel Number: 24-52-05-001-1330

    • Zoning: 0100

  • Type and style

    • Property Type: Residential

    • Property Sub Type: Single Family Residence

  • Other financial information

    • Annual tax amount: $40,335

  • Source details

    • MLS ID: A11997896

    Other facts

    • Construction Materials: Elevated Construction / Piling Construction

    • Lot Features: 1/4 To Less Than 1/2 Acre Lot

    • Patio And Porch Features: Open Balcony / Open Porch / Patio

    • Pool Features: In Ground

    • Window Features: Hurricane Shutters / Impact Glass / Plantation Shutters

    • Direction Faces: Northwest

    • Architectural Style: Attached / Two Story

    • Garage Spaces: 1

    • Attached Garage: Yes

    • Garage: Yes

    • Living Area: 5421

    • Water Source: Municipal Water

    • Subdivision Name: BISCAYNE KEY ESTATES

Private inquiry
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The multiple listing information is provided by the Miami Association of REALTORS® from a copyrighted compilation of listings. The compilation of listings and each individual listing are ©2026-present Miami Association of REALTORS®. All Rights Reserved. The information provided is for consumers' personal, noncommercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. All properties are subject to prior sale or withdrawal. All information provided is deemed reliable but is not guaranteed accurate, and should be independently verified. Listing courtesy of: Avanti Way Realty LLC