360 Harbor Lane, Key Biscayne, FL 33149

$9,950,000 — Active

Property Features

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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.

Property Details

  • Listing ID: A12104430
  • Status: Active
  • Listing Date: 2026-10-19
  • Property Type: Single Family Residence
  • Subdivision: BISCAYNE KEY ESTATES
  • County: Miami-Dade
  • MLS Area: 2520
  • Bedrooms: 6
  • Full Bathrooms: 5
  • Half Bathrooms: 1
  • Living Area Sq Ft: 4,341
  • Lot Dimensions: 9300
  • Year Built: 2025

Financial

  • List Price: $9,950,000
  • HOA Fee: None
  • Taxes: $31,314/yr

Features & Amenities

  • View: Garden, Pool
  • Furnished: Unfurnished
  • Pets Allowed: Yes
  • Parking: Attached Carport, Driveway, Paver Block, Carport
  • Cooling: Central Air, Electric
  • Heating: Central, Electric
  • Flooring: Marble, Wood
  • Construction: Block, Other
  • Roof: Flat, Tile
  • Interior Features: Built-in Features, Entrance Foyer, High Ceilings, Other, Walk-In Closet(s), Closet Cabinetry
  • Exterior Features: Built-in Barbecue, Lighting, Balcony
  • Community Amenities: None

Courtesy of Coldwell Banker Realty
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RAPB

© 2026 Starfish Real Estate. Listings updated Nov 7, 2026 2:03 am. Listing data is derived from the Broker Reciprocity Program of the Realtor Association of Indian River County (RAIRC) and BeachsMLS. Properties listed by brokers other than Starfish Real Estate are identified with the applicable MLS logo and include the listing broker's name. Not all properties available through either MLS may be displayed. All MLS data is the copyrighted property of the respective MLS and its participants. Data is deemed reliable but is not guaranteed accurate and should be independently verified prior to entering into any transaction.