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360 Harbor Ln, Key Biscayne, FL 33149
$9,950,000
· $2,292/sqft · Est. $58,520/mo
6 bd · 5.5 ba · 4,341 sqft · 0.21 acres (9,300 sqft) · 23 days on market · MLS# A12104430
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Seller's Disclosure
Property Survey
Floor Plan
Comparative Market Analysis
About 360 Harbor Ln, Key Biscayne, FL 33149
Listing details for 360 Harbor Ln, Key Biscayne, FL 33149: Discreetly 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.
Bedrooms
6
Bathrooms
5.5
5 full · 1 halfSquare Feet
4,341
Year Built
2025
Lot
0.21 acres (9,300 sqft)
Garage
—
HOA
No
Taxes (2025)
$31,314
Property Details for 360 Harbor Ln, Key Biscayne, FL 33149
MLS# A12104430 · Source: MIAMI + RWorld · Updated Nov 11, 2026
Interior
Bedrooms & Bathrooms
- Bedrooms: 6
- Full Baths: 5
- Half Baths: 1
Heating & Cooling
- Heating: Central, Electric
- Cooling: Central Air, Electric
Appliances & Laundry
- Appliances Included: Built-In Oven, Dryer, Dishwasher, Electric Range, Disposal, Microwave, Refrigerator, Wine Cooler, Water Purifier, Washer
Interior Features
- Interior Features: Built-In Features, Bedroom on Main Level, Closet Cabinetry, Dining Area, Separate Formal Dining Room, Dual Sinks, Entrance Foyer, First Floor Entry, High Ceilings, Kitchen Dining Combo, Living Dining Room, Sitting Area in Primary, Shower Only, Upper-Level Primary, Walk-In Closet(s)
- Flooring: Hardwood, Marble, Wood
- Has Fireplace: No
- Furnished: Unfurnished
Interior Area
- Total Interior Livable Area: 4,341 sqft
- Total Structure Area: 5,156 sqft
Property
Parking
- Has Garage
- No
- Covered Spaces
- 2
- Parking Features
- Attached Carport, Driveway, Paver Block
- Carport
- Yes
Features
- Stories
- 2
- Direction Faces
- Northeast
- Patio & Porch
- Balcony, Deck, Open
- Exterior Features
- Balcony, Deck, Security High Impact Doors, Lighting, Outdoor Grill
- Has Private Pool
- Yes
- Pool Features
- Heated, In-Ground, Pool
- View Description
- Garden, Pool
- Waterfront
- No
Lot
- Lot Size
- 0.21 acres (9,300 sqft)
- Lot Features
- Flood Zone, Automatic Sprinklers, Sprinkler System, Less than 1/4 Acre
Details
- Parcel Number
- 24-52-05-001-1490
- Zoning
- 0100
- Legal Description
- 5 & 6 55 42 Biscayne Key Ests PB 50-61 Lot 3 Blk 10 Lot Size 8000 Sq Ft or 12488-3411 0485 4 Coc 24947-2228 09 2006 5
Construction
Type & Style
- Home Type
- Single Family Residence
- Property Type
- Residential
- Architectural Style
- Contemporary Modern, Detached, Two Story
Materials
- Construction Materials
- Block
- Roof
- Flat, Tile
- Window Features
- Blinds, Impact Glass
- Storm Protection
- Complete Impact Glass, Impact Glass
Condition
- Condition
- Resale
- New Construction
- Yes
- Year Built
- 2025
Utilities & Green Energy
- Water Source
- Public
- Sewer
- Public Sewer
Community & HOA
Community
- Subdivision
- Biscayne Key Estates
- Pets Allowed
- Yes - No
- Restrictions
- No Restrictions
- 55+ Community
- No
Housing in Village Of Key Biscayne
- Median Value of All Homes (2023 Census)
- $1,246,268
- Median Rent
- $3,394/mo
- Owner-Occupied Homes
- 69%
- Homes Built
- Mostly 1970s
- Housing Units
- 4,994
HOA
- Membership Required
- No
Location
- Neighborhood
- Village Of Key Biscayne
Financial & Listing Details
- Price per Sq Ft
- $2,292/sq ft
- Annual Tax Amount
- $31,314
- Tax Year
- 2025
- Date on Market
- Oct 19, 2026
- Cumulative Days on Market
- 23 days
- Listing Terms
- Cash, Conventional
- Possession
- Closing and Funding
- Occupant Type
- Call Agent
- MLS Number
- A12104430
- Listed By
- Judith Zeder — Coldwell Banker Realty, Daniel Hertzberg — Coldwell Banker Realty
Biscayne Key Estates
Biscayne Key Estates is a neighborhood in Key Biscayne. Census median home value is $1,246,268.
Location of 360 Harbor Ln, Key Biscayne, FL 33149
- Street Address
- 360 Harbor Ln
- City
- Key Biscayne
- ZIP Code
- 33149
- Neighborhood
- Biscayne Key Estates
- County
- Miami-Dade County
Estimated monthly
30-yr fixed
$58,520
/mo
$9,950,000 · 20% down · 7.16%
Principal & interest
$53,838
Property taxes
$2,610
Home insurance
$2,073
Home price
$9,950,000
Down payment
$1,990,000 · 20%
Interest rate
7.16%
Estimates only. Actual costs vary by lender, credit score, and market conditions.
Frequently Asked Questions About 360 Harbor Ln
How much is 360 Harbor Ln, Key Biscayne, FL 33149 listed for?
360 Harbor Ln, Key Biscayne, FL 33149 is currently listed at $9,950,000. That works out to approximately $2,292 per square foot.
How big is 360 Harbor Ln?
This property features 6 bedrooms, 5.5 bathrooms, 4,341 sq ft of living space.
What are the property taxes on 360 Harbor Ln, Key Biscayne, FL 33149?
The most recent tax bill for 360 Harbor Ln, Key Biscayne, FL 33149 is $31,314/yr (~$2,610/mo). Florida primary residents may qualify for a homestead exemption that reduces this amount.
Are there HOA fees at 360 Harbor Ln?
Based on current MLS data, no HOA fee is listed for this property. We recommend confirming with the seller's disclosure or your agent, as some communities charge fees not reflected in MLS.
Which schools are zoned for 360 Harbor Ln, Key Biscayne, FL 33149?
360 Harbor Ln, Key Biscayne, FL 33149 is located in Key Biscayne, FL 33149. School assignments are set by the county school board and can change. Verify with the county school district before enrolling.
How does the list price compare to Biscayne Key Estates home values?
At $9,950,000, this home is listed 698% above the Biscayne Key Estates census median home value of $1,246,268. Actual sale price is set by negotiation.
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Listing Information & Disclaimer
Listed By: Coldwell Banker Realty · 305.613.5550
All listings featuring the BMLS logo are provided by BeachesMLS, Inc. This information is not verified for authenticity or accuracy and is not guaranteed. Copyright ©2026 BeachesMLS, Inc.
Listing information is provided in part by the MIAMI + RWorld Internet Data Exchange program. IDX information is provided exclusively for consumers' personal, non-commercial use, and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Data is deemed reliable but is not guaranteed accurate by the MLS. Data last updated Nov 13, 2026 7:45 PM. Equal Housing Opportunity.
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