580 & 590 10th Street, Key Colony, FL 33051
New Listing
$3,650,000
Property Type:
Residential
Bedrooms:
7
Baths:
7
Square Footage:
4,478
Lot Size (sq. ft.):
8,250
Status:
Active
Current Price:
$3,650,000
List Date:
12/22/2025
Last Modified:
12/22/2025
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
Listing Board: Marathon/Lower Keys
As is Rght to Inspct: Yes
Current Price: $3,650,000
Listing Date: 2025-12-22
List Price: $3,650,000
Location, Tax & Legal
City: KEY COLONY
Mile Marker: 53.5
Marathon Neighborhood: Marathon East - Gulf (Airport to Vaca)
Side: Ocean
Flood Zone: Zone AE EL 7
Alternate Key #: 1081558
Handicap Access: No
Parcel #: 00075930-000000
Zoning: R-2A - Key Colony Two Family
Deed Restrictions: Unknown
Legal: BK10 LT 48 KEY COLONY BEACH FIRST ADDN AMENDED PLAT PB-4-11 SHELTER KEY OR341-309/10 OR566-245 OR722-402 OR1394-1921D/C
Taxes: 19308
Tax Year: 2025
Pub Sewer HkUp: Yes
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
Waterfront: Yes
Control Depth: 5
Lot SqFt: 8250
Pool: Yes
Lot Sqft Source: Tax Records
SqFt Source: Property Data Card
Rentals Allowed: Yes
Min Rental Days: 7
Style: Duplex
Year Built: 1985
Living Apx SqFt: 4478
Total Bedrooms: 7
Full Baths: 7
Total Baths: 7
Remarks & Misc
Remarks – Consumer: 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.
Directions: From HWY 1 travel down Sadowski Cswy, turn right on West Ocean, turn right on 10th St, house is on the right midway down 10th.
Association Info
Mandatory Home Owners Asc: No
1st Right of Refusal: No
Association Fee $: 0
Fee Includes
None: 1
Dockage
Dock Length: 75
Dock: Concrete
Tax Exemptions
None: 1
Appliances
Dishwasher: 1
Dryer: 1
Microwave: 1
Oven: 1
Range: 1
Refrigerator: 1
Stainless Steel Appliance(s): 1
Washer: 1
Pets
Pets Allowed: 1
Cooling
Ceiling Fans(s): 1
Central Air: 1
Waterfront
Canal Front: 1
Waterview
Canal View: 1
Floor
Carpet: 1
Tile: 1
Neighborhood Feature
Beach: 1
Bike Paths: 1
Tennis Courts: 1
Interior Features
Built-in Cabinets: 1
Drapes/Blinds Incl: 1
Entrance Foyer: 1
Granite Counter Top: 1
Smoke Alarms: 1
Wet Bar: 1
Window Treatments: 1
Specialty Rooms
Laundry Room: 1
Building Style
Above Flood: Unknown
Stories: 2 Stories
Windows/Doors
Impact Rstnce Doors: 1
Impact Rstnce Window: 1
Vehicle Storage
Garage: 1
Guest Parking: 1
Off Street Parking: 1
Security
Patrolled Area: 1
Construction
CBS: 1
Land Size
Less Than 1/4 Acre: 1
Utilities
Buyer to Verify: 1
Elect Separate Meter: 1
FKAA: 1
Municipal Sewer: 1
Porch/Balcony
Open Porch/Balcony: 1
Patio: 1
Title
Title Ins - Buyer: 1
Exterior Features
Fencing: 1
Hot Tub: 1
Lanai: 1
Lighting: 1
Outdoor Shower: 1
Storage: 1
Pool Info
In Ground: 1
Heated: Yes
Roof
Metal Roof: 1
Status Change Info
Status: Active
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: December - 22 - 2025
The data relating to real estate for sale on this web site comes in part from the Florida Keys MLS, Inc. Information provided is deemed reliable but not guaranteed. All properties are subject to prior sale, change or withdrawal. The information being provided is for consumers’ personal, non-commeral use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. IDX data is deemed reliable but is not guaranteed accurate by the MLS.