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360 Harbor Lane, Key Biscayne, FL 33149

New Listing
$9,950,000
Property Type: Residential Bedrooms: 6 Baths: 6 Square Footage: 5,156 Status: Active
Current Price: $9,950,000 List Date: 10/19/2026 Last Modified: 10/20/2026

Description

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.

More Information MLS# A12104430

Contract Information

Comp Sale YN: No Occupant Type: Call Listing Agent Listing Date: 2026-10-19 Status: Active Original List Price: 9950000 List Price: $9,950,000 Current Price: $9,950,000

Location and Legal

County Or Parish: Miami-Dade County Parish Name: Miami-Dade City Name: Key Biscayne Municipal Code: 24 Postal Zip: 33149 Subdivision Number: 1 Flood Zone: AE Country: United States Street Number: 360 Street Name: Harbor Street Suffix: Lane State Or Province: FL Postal Code: 33149 Postal Code +4: 1712 Subdivision Name: BISCAYNE KEY ESTATES Area: 2520 Elementary School: Key Biscayne K-8 Middle Or Junior School: Ponce De Leon High School: Coral Gables Parcel Number: 2452050011490 Zoning: 0100

General Property Information

Living Area Main: 4341 Lot Size Dimensions: 9300 Attached Carport YN: Yes Lot Size Area: 9300 Senior Community YN: No Outdoor Living Spaces YN: Yes Furnished: Unfurnished Stories Total: 2 Pool Private YN: Yes Property Sub Type: Single Family Residence Bedrooms Total: 6 Bathrooms Total: 6 Bathrooms Full: 5 Bathrooms Half: 1 Building Area Main: 5156 Year Built: 2025 Carport YN: 1 Carport Spaces: 2 Covered Spaces: 2 Lot Size Acres: 0.21 Direction Faces: Northeast

Financial Information

Estimated Monthly Assoc Recurring Fee: 0 Membership Fee Required YN: No Tax Annual Amount: 31314 Tax Year: 2025 Tax 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

Office/Member Information

DXORIGMLSID: SEF

Amenities

None: 1

Dining Area

Dining/Living Room: 1 Formal Dining: 1 Kitchen Dining: 1

Entry Information

Entry Level: 1

Exterior Features

Built-in Barbecue: 1 Lighting: 1

Flooring

Marble: 1 Wood: 1

Parking Features

Driveway: 1 Paver Block: 1 Attached Carport: 1 Carport: 1

Property Condition

Resale: 1

Possession

Negotiable: 1

Sewer

Public Sewer: 1

Special Information

Property Survey Available: 1

View

Garden: 1 Pool: 1

Heating

Central: 1 Electric: 1

Sprinkler Description

Auto Sprinkler: 1 City Sprinkler System: 1

Unit Description

Studio: 1

Window Features

Blinds: 1

Appliances

Dishwasher: 1 Disposal: 1 Dryer: 1 Electric Range: 1 Microwave: 1 Oven: 1 Refrigerator: 1 Washer: 1 Water Purifier: 1 Other: 1

Construction Materials

Block: 1 Other: 1

Interior Features

Built-in Features: 1 Closet Cabinetry: 1 Entrance Foyer: 1 High Ceilings: 1 Walk-In Closet(s): 1 Other: 1

Levels

Two: 1

Listing Terms

Cash: 1 Conventional: 1

Other Equipment

Other: 1

Pool Features

Heated: 1 In Ground: 1

Roof

Flat: 1 Tile: 1

Water Source

Public: 1

Architectural Style

Contemporary: 1

Cooling

Central Air: 1 Electric: 1

Showing Requirements

24 Hour Notice: 1

Master Bedroom/Bath

Dual Sinks: 1 Master Bdrm - Ground: 1 Master Bdrm - Sitting: 1 Master Bdrm - Upstairs: 1 Separate Shower: 1

Pets Allowed YN

Yes: 1

Pool Size Details

Pool Size (WxL): 0

Restrictions

No Restrictions: 1

Storm Protection

Impact Glass: Complete

Tax Information

City/County: 1 Tax Reflects No Exemptions: 1

Outdoor Living Spaces

Balcony: 1 Deck: 1

Balcony Details

Balcony - Open: 1

Room Types

Den: 1 Family Room: 1 Laundry: 1 Maid/In-Law Quarters: 1 Other: 1

Price Calculations

Current Price To SqFt: 2292.09

Section Details

Parcel Number MLX: 1490

Status Change Information

Major Change Timestamp: 2026-10-19T04:00:00Z Major Change Type: New Listing Status Change Date: 2026-10-19

Originating Details

Originating System Key: 566501064 Originating System ID: M00000151

Property Features

Dining Area: Dining/Living Room; Formal Dining; Kitchen Dining Exterior Features: Built-in Barbecue; Lighting Flooring: Marble; Wood Parking Features: Driveway; Paver Block; Attached Carport; Carport Property Condition: Resale Appliances: Dishwasher; Disposal; Dryer; Electric Range; Microwave; Oven; Refrigerator; Washer; Water Purifier; Other Architectural Style: Contemporary Construction Materials: Block; Other Cooling: Central Air; Electric Heating: Central; Electric Interior Features: Built-in Features; Closet Cabinetry; Entrance Foyer; High Ceilings; Walk-In Closet(s); Other Levels: Two Listing Terms: Cash; Conventional Other Equipment: Other Pets Allowed YN: Yes Pool Features: Heated; In Ground Possession: Negotiable Restrictions: No Restrictions Roof: Flat; Tile Sewer: Public Sewer Special Information: Property Survey Available Sprinkler Description: Auto Sprinkler; City Sprinkler System Tax Information: City/County; Tax Reflects No Exemptions Unit Description: Studio View: Garden; Pool Water Source: Public Window Features: Blinds Showing Requirements: 24 Hour Notice Outdoor Living Spaces: Balcony; Deck Balcony Details: Balcony - Open Room Types: Den; Family Room; Laundry; Maid/In-Law Quarters; Other

Room Information

Den Family Room Maid/In-Law Quarters Other Laundry
Listing Office: Coldwell Banker Realty
Last Updated: October - 20 - 2026
360 Harbor Lane, Key Biscayne, FL 33149- MLS# A12104430
This information is not verified for authenticity or accuracy and is not guaranteed and may not reflect all real estate activity in the market. Copyright 2026 Beaches Multiple Listing Service, Inc. All rights reserved. Information Not Guaranteed and Must Be Confirmed by End User. Site contains live data.