
685 Harbor Ln, Key Biscayne, FL 33149
Key Biscayne, FL 33149 · BISCAYNE KEY ESTATES
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 home | Key Biscayne median (12 mo) | |
|---|---|---|
| Price per sq. ft. | $1,282 | $969 |
| 5-bedroom price | $6,950,000 | $5,477,500 |
| Days on market | 145 | 61 |
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
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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.