Atlantic Luxury Advisors
685 Harbor Ln photo 1685 Harbor Ln photo 2685 Harbor Ln photo 3685 Harbor Ln photo 4685 Harbor Ln photo 5

46 photos

685 Harbor Ln

Key Biscayne, FL 33149

$6,950,000
5
5.5
5,421 sq ft
9,000 sq ft
2001
1 car
Single Family Residence
145
Active

Listing courtesy of Avanti Way Realty LLC (Marisela Gonzalez Servat). Contact: [email protected].

About this home

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.

What it costs to own
Estimated monthly payment
$50,130/mo
Principal and interest
$35,143
Property tax
$10,645
Homeowners insurance
$4,342
HOA(not in the listing)
$0

An estimate, not a loan offer. The rate and insurance are assumptions to edit with your own quotes; Florida insurance varies widely by age, construction and distance to the coast. Flood insurance and PMI are not included.

Florida cost of ownership
Estimated property tax
$127,742/yr

Estimate: the price times the Miami-Dade County average total millage (18.49 mills, Florida Department of Revenue, 2025 average total millage by county), less the homestead exemptions. The actual bill depends on the city, the assessed value and special assessments. Save Our Homes then caps annual assessment increases at 3% or inflation, whichever is lower.

HOA
Not stated in the listing; ask us
FEMA flood zone
Zone AE, special flood hazard area

Inside the 1% annual chance floodplain. Lenders require flood insurance on a financed home; ask for the elevation certificate.

Hurricane evacuation zone
Zone A: first to evacuate, ordered for tropical storms and every hurricane category.

Sources: FEMA National Flood Hazard Layer and the Florida Division of Emergency Management evacuation zones, looked up at the listing point. Confirm with an elevation certificate and your insurer.

Location

Listing data provided by the Southeast Florida Multiple Listing Service (MIAMI REALTORS®). The data is deemed reliable but is not guaranteed accurate by the MLS. IDX information is provided exclusively for consumers' personal, non-commercial use, may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing, and is deemed reliable but is not guaranteed accurate by the MLS. Atlantic Luxury Advisors is a real estate team at Keller Williams Realty. Payment, tax and flood figures on this page are estimates by Atlantic Luxury Advisors, not MLS data.