Exceptional canal-front opportunity with proven income potential

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Home For Sale

580 & 590 10th Street

Key Colony Beach, Florida 33051

Monroe County

Waterfront: Yes

Community: Key Colony Bch 1st Addn Amd Plat (535)

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$3,650,000 7 br, 7.0 bath 4478 sq. ft. 0.000 acres

Exceptional canal-front opportunity with proven income potential. This expansive 7-bedroom, 7-bath residence offers outstanding flexibility as a legal duplex with an interior lockout, allowing it to function seamlessly as a large single-family home or as two separate living spaces. The configuration includes a generous 5BR/4BA main residence paired with a private 2BR/2BA guest wing, topped off by a convenient pool bath located in the game room, making it ideal for multigenerational living, guests, or vacation rental use. The main living space welcomes you with a dramatic two-story entry, an open-concept great room, multiple dining areas, wet bar, and a well-appointed kitchen that flows to a waterside balcony. The lower-level unit features its own open living and kitchen area, providing privacy and versatility. Four bedrooms are ensuite, complemented by 2 primary suites overlooking the water. Recent upgrades include complete concrete spalling repairs and a fresh exterior repaint, adding peace of mind and refreshed curb appeal. Mediterranean-inspired design elements are carried throughout, along with impact windows and doors, multiple balconies, and inviting indoor-outdoor living spaces. Outside, enjoy a heated pool, spa, covered poolside lanai, and 75 feet of concrete dockage with quick boating access to both the Atlantic Ocean and the Gulf of America. Additional features include a two-car garage and ample off-street parking.This property has a strong, established vacation rental history and is currently an active rental.

Interior:
  • Bedrooms: 7
  • Baths: 7.0
  • Sq Ft: 4478
  • Year Built: 1985
  • Utilities: 
  • Fireplaces: 
  • Stories: 2
  • Heat/AC: 
  • Garage: Garage, Guest
Exterior:
  • Lot Size: 0.000 acre
  • Lot Dimensions: 
  • Waterfront: Yes
  • View Types: 
  • Yard: 
  • Siding: 
  • Roof: Metal
  • Property Taxes: $19,308
  • MLS #: 617788
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Contact Information:
Beach Home For Sale in Key Colony Beach, Florida
Listing Agent: Nate Bartlett, Berkshire Hathaway HomeServices Keys Real Estate, 305-800-6283, 305-743-7636 Listing Site, Listing Status: Active
Copyright © 2025 Marathon and Lower Keys Association of Realtors. All rights reserved. All information provided by the listing agent/broker is deemed reliable but is not guaranteed and should be independently verified.
Ad Number: 6994314
Viewed 33 times.
Updated: Jan 04, 2026

This property is a Home located at 580 & 590 10th Street, Key Colony Beach, Florida 33051, and is currently For Sale at $3,650,000. This Home has 7 bedrooms, 7.0 baths, 4478 sq ft.