646 William Street, Key West, FL 33040
$1,400,000
Property Type:
Residential
Bedrooms:
3
Baths:
2
Square Footage:
1,780
Lot Size (sq. ft.):
4,116
Status:
Active
Current Price:
$1,400,000
List Date:
9/25/2026
Last Modified:
9/26/2026
Description
644 William Street
The property being sold is 644 William Street. The current property record/card reflects both 644 and 646 William Street, although the property being conveyed is 644 William Street.
The structure at 644 William Street is a two-and-a-half-story home currently configured as a duplex and is in need of renovation.
The first floor consists of two bedrooms and two bathrooms. The second floor contains two bedrooms and one bathroom. A stairwell provides access to the third floor, which is currently unfinished and is not completed or configured as living space.
In its current condition, the property contains four bedrooms and three bathrooms of finished living area, with additional unfinished space on the third floor. The property is currently being used/configured as a duplex and will require renovation.
More Information MLS# 621406
Contract Information
Current Price: $1,400,000
Listing Date: 2026-09-23
Listing Board: Key West Association
List Price: $1,400,000
Potential Short Sale: No
Bank Owned: No
Location Tax Legal
Street #: 646
Street Name: William
Street Suffix: Street
Key/Island: Key West
State/Province: FL
Zip Code: 33040
County: Monroe
Subdivision: Old Town - Unlisted (1.0)
Area: 02 - Key West
General Property Description
Realtor.COM Type: Multi-family
Style: Duplex
Waterfront: No
Pool: No
Year Built: 1928
Lot Size: 65 X 78
Lot SqFt: 4116
Acres: 0.09
Living Apx SqFt: 1780
SqFt Source: Property Data Card
Total Bedrooms: 3
Full Baths: 2
Total Baths: 2
Rentals Allowed: Yes
Min Rental Days: 30
Status Change Info
Status: Active
Association Info
Mandatory Home Owners Asc: No
1st Right of Refusal: No
Building Style
Above Flood: Yes
Stories: 2 Stories
Financial Status
Bank Owned: No
Potential Short Sale: No
Property Features
Fee Includes: None
Tax Exemptions: None
License Info: Non Trans Rntl Lic
Waterfront: None
Waterview: No Waterview
Dockage: None
Property Condition: Fixer Upper
Building Style: Conch
Vehicle Storage: Off Street Parking
Furnished: Unfurnished
Cooling: Wall/Window Unit(s)
Heating: Hot Water
Utilities: FKAA
Construction: Frame
Shutters: Other
Floor: Combo
Roof: Metal Roof
Pets: Pets Allowed
Security: No Security
Land Size: Less Than 1/4 Acre
Terms: Cash; Conventional
Title: Title Ins - Seller
Listing Office: Coldwell Banker Schmitt Real Estate Co. (KW)
Last Updated: September - 26 - 2026
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.
