685 Harbor Ln

Key Biscayne, FL 33149

$6,950,000

$1,282/ft²

5Beds

5.5Baths

5,421Sq ft

2001Year built

Single-family homeType

About this home

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.

Property details

Listing

MLS #: A11997896
Status: For sale
Listed on: Apr 16, 2026
Days on market: 115 days
Listing data updated: May 6, 2026

Interior

Beds: 5
Baths: 5.5
Living area: 5,421 ft²
Price per ft²: $1,282/ft²

Building & community

Type: Single-family home
Year built: 2001
County: Miami-Dade

Lot & exterior

Lot size: 9,000 ft²

Days on market, price per ft² and the monthly HOA amount are calculated by this site from the MLS data shown; the association fee is normalized to a monthly figure.

True monthly cost

Mortgage (principal & interest): $35,143
Property taxes (est.): $6,371
Home insurance (est.): $600
Flood insurance (est.): —

Estimated total$42,114*/mo

* Some cost lines aren't available yet for this listing; the total shown is incomplete.

Based on 20% down, a 6.5% rate and a 30-year loan, plus this home's estimated Florida carrying costs. All figures are illustrative estimates — not quotes, not financial or insurance advice.

Sources: flood zone — FEMA National Flood Hazard Layer; mortgage, taxes and insurance figures — this site's own estimates; HOA / CDD — as reported for this listing.

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