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+11 photosLuxury estate — 360 Harbor Lane · Biscayne Key Estates · Key Biscayne

















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Open property magazine$9,950,000
360 Harbor Lane, Key Biscayne, FL 33149
Key Biscayne, FL, 33149
6 bd · 6 ba · 4,341 sqft
Listed by Coldwell Banker Realty
360 Harbor Lane, Key Biscayne, FL 33149
Listed by Coldwell Banker Realty
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Estimated monthly payment
$63,111/mo
Know your costs before you buy
Work through three numbers: your estimated monthly payment, the cash needed at closing, and insurance & flood.
Estimated monthly payment $63,111/mo · principal, interest, taxes, insurance and HOA. Verify before you buy.
Cash to close includes the down payment, lender and title costs, taxes, insurance prepayments and escrow deposits. Editable estimate only.
Insurance and flood: AE · verify insurance quotes before buying.
About this home
Find similar homesDiscreetly set in the heart of Key Biscayne — one of Miami’s most coveted island communities — this elegant modern two-story residence offers 5,156 SF of total space on a lush 9,300 SF lot with 6 bedrooms, 5.5 bathrooms, and a private office, perfectly balancing refined design with the relaxed island lifestyle. A travertine staircase entry and wrap-around porch with modern glass railings set a sophisticated tone, leading inside to soaring ceilings, herringbone oak floors by Listone Giordano, floor-to-ceiling sliding doors, and Lutron lighting. The open-concept living, dining, and family areas flow seamlessly to the outdoors. The chef’s kitchen showcases a striking fluted marble island with curved-edge countertops, floor-to-ceiling cabinetry by Design It, and a full Wolf and Sub-Zero appliance suite. The primary suite features a private terrace, dual custom walk-in closets, a dry sauna, and a show-stopping bath with aquamarine quartzite sourced from ARCA, dual Waterworks vanities, and a frameless glass shower. Outside, a covered terrace with fluted wood-paneled ceiling, summer kitchen with built-in grill and pizza oven, and a heated saltwater pool with marble deck and Baja ledge create the ultimate island retreat. Professionally designed landscaping and enchanting exterior uplighting illuminate the lush gardens, creating picturesque views through the home’s expansive glass walls, particularly after sunset. Integrated sound and four AC units complete this exceptional offering.
Property Details
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Your costs (est.)
≈ $63,111/mo
360 Harbor Lane, Key Biscayne, FL 33149 · Key Biscayne
Location
360 Harbor Lane, Key Biscayne, FL 33149
What buyers ask about this home
What are the estimated monthly carrying costs at 360 Harbor Lane, Key Biscayne, FL 33149?+
Property tax (after sale): $10,719/month est.; homeowners insurance: $764/month est.; HOA: $0/month. Fixed ownership costs before a mortgage: $11,483/month est. Principal and interest: $51,628/month; PMI: $0/month. Total for the payment scenario shown: $63,111/month est. Flood insurance is not included. Estimate only, not guaranteed. Verify before you buy or sell.
Will property taxes go up after I buy 360 Harbor Lane, Key Biscayne, FL 33149?+
Usually yes. In Florida the assessed value resets to market value in the year after a sale, so the seller's current tax bill is rarely what a new owner pays. Budget roughly 1.8–2.0% of the purchase price annually until you file for homestead exemption and the Save Our Homes cap (or the 10% non-homestead cap) starts limiting increases.
Does 360 Harbor Lane, Key Biscayne, FL 33149 need flood insurance, and what drives the premium?+
Most of Key Biscayne sits in a FEMA flood zone, and lenders require flood coverage in high-risk zones. Premiums are driven by elevation certificate, flood zone, roof age and shape, and whether the home has impact windows or accordion shutters. Ask for the current declarations page, the four-point inspection and wind mitigation report early — they set your real cost of ownership.
What should an inspection focus on for a home like 360 Harbor Lane, Key Biscayne, FL 33149?+
In coastal South Florida, prioritize roof age and permit history, whether windows and doors are impact-rated, the seawall and dock condition on waterfront lots, drainage and elevation, plumbing type, and any open or expired permits with the city. These items, not cosmetics, drive both price and insurability.
What extra costs come with the pool at 360 Harbor Lane, Key Biscayne, FL 33149?+
A pool typically adds ongoing service, chemicals and electricity, plus periodic resurfacing and equipment replacement. Verify the safety barrier meets Florida code, which is required for insurance and resale.
Is there room to negotiate on 360 Harbor Lane, Key Biscayne, FL 33149?+
This listing has been on the market 25 days. Leverage comes from days on market, price history, comparable closed sales and the seller's motivation — not from a fixed percentage. I pull the full history and the true comps before we write, so the offer is built on what the property is actually worth today. Call or text (954) 562-1798 for that analysis.
Neighborhood & Commute
Located in Key Biscayne, this property offers the South Florida lifestyle — warm-weather living year-round with easy access to the Atlantic coast, A-rated schools, and major business centers.
Approximate Drive Times
Drive times are estimates based on straight-line distance at typical South Florida traffic speeds. Actual times vary with traffic and routing.
Assigned schools for this address
Ponce de Leon Middle
Middle school
Coral Gables Senior High
High school
Zone boundaries published by Miami-Dade County Public Schools.
Other options for this address
Key Biscayne Presbyterian School
Elementary · Private · Christian · Grades PK–K · Key Biscayne
School assignment is set by the district and can change. Always confirm the zoned school with the district before you buy.
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