580 & 590 10th Street, Key Colony, FL 33051

$3,395,000
Property Type: Residential Bedrooms: 7 Baths: 7 Square Footage: 4,478 Lot Size (sq. ft.): 8,250 Status: Active
Current Price: $3,395,000 List Date: 12/22/2025 Last Modified: 2/08/2026

Description

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.

More Information MLS# 617788

Contract Information

Current Price: $3,395,000 Listing Date: 2025-12-22 Listing Board: Marathon/Lower Keys List Price: $3,395,000 As is Rght to Inspct: Yes

Location Tax Legal

Street #: 580 & 590 Street Name: 10th Street Suffix: Street Key/Island: Key Colony State/Province: FL Zip Code: 33051 County: Monroe Subdivision: Key Colony Bch 1st Addn Amd Plat (53.5) Area: 17 - Vaca Cut - Both Sides Holiday Inn/Key Colony

General Property Description

Realtor.COM Type: Multi-family Style: Duplex Waterfront: Yes Control Depth: 5 Pool: Yes Year Built: 1985 Lot SqFt: 8250 Lot Sqft Source: Tax Records Living Apx SqFt: 4478 SqFt Source: Property Data Card Total Bedrooms: 7 Full Baths: 7 Total Baths: 7 Rentals Allowed: Yes Min Rental Days: 7

Status Change Info

Status: Active

Association Info

Mandatory Home Owners Asc: No 1st Right of Refusal: No

Dockage

Dock Length: 75 Dock: Concrete

Building Style

Above Flood: Unknown Stories: 2 Stories

Pool Info

Heated: Yes

Property Features

Fee Includes: None Tax Exemptions: None Waterfront: Canal Front Waterview: Canal View Vehicle Storage: Garage; Guest Parking; Off Street Parking Cooling: Ceiling Fans(s); Central Air Utilities: Buyer to Verify; Elect Separate Meter; FKAA; Municipal Sewer Interior Features: Built-in Cabinets; Drapes/Blinds Incl; Entrance Foyer; Granite Counter Top; Smoke Alarms; Wet Bar; Window Treatments Specialty Rooms: Laundry Room Appliances: Dishwasher; Dryer; Microwave; Oven; Range; Refrigerator; Stainless Steel Appliance(s); Washer Exterior Features: Fencing; Hot Tub; Lanai; Lighting; Outdoor Shower; Storage Pool Info: In Ground Construction: CBS Floor: Carpet; Tile Roof: Metal Roof Pets: Pets Allowed Neighborhood Feature: Beach; Bike Paths; Tennis Courts Security: Patrolled Area Land Size: Less Than 1/4 Acre Title: Title Ins - Buyer
Listing Office: Berkshire Hathaway HomeServices Keys Real Estate
Last Updated: February - 08 - 2026
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