Opportunity awaits in the heart of Midtown Key West! This rare double-lot offering includes two side-by-side parcels with endless potential for redevelopment or renovation. 1503 Seminary Street features a 2-bedroom, 1-bathroom single-family home built in 1943 with 1,160 sq. ft. of living area. The home offers a spacious layout ready for your personal touch — ideal for a full remodel or a complete redesign. 1509 Seminary Street currently includes a small structure in need of teardown, providing a clean slate for new construction, expansion of the adjacent home, or the creation of a private compound. Zoned residential and centrally located just minutes from beaches, shopping, dining, and Old Town, this is an exceptional investment for builders, developers, or anyone looking to create their own Key West .
Est. $2,963 per month, based on comparable rentals
Sale and tax history for 1503-1509 Seminary St
Sale History
Tax History
Date
Event
Price
FLKMLS #617066
Jul 27, 2026
Sold
$900,000
$549/sq ft
Mar 31, 2026
Price Changed
$1,000,000
$610/sq ft
Feb 26, 2026
Price Changed
$1,125,000
$686/sq ft
Jan 21, 2026
Price Changed
$1,225,000
$747/sq ft
Dec 16, 2025
Relisted
—
Oct 31, 2025
Contingent
—
Oct 27, 2025
Listed
$1,275,000
$777/sq ft
Year
Property tax
Land + Additions
Assessment*
2025
$4,136 (+3.1%)
2024
$4,012 (+7.6%)
2023
$3,728 (+18.5%)
2022
$3,147 (+13.8%)
2021
$2,764 (+4.4%)
$212,400 + $54,440
$266,840
2020
$2,649 (+3.0%)
$200,600 + $54,440
$255,040
2019
$2,573 (+5.9%)
$200,600 + $54,440
$255,040
2018
$2,429 (+3.3%)
2017
$2,353 (+9.6%)
$182,163 + $55,278
$237,441
2015
$2,147 (+2.5%)
$186,307 + $49,670
$235,977
2014
$2,095
Public record
Public record
Zoning
Permits
Beds
1
Baths
1
Stories
1
Lot width
—
Lot depth
—
Lot size
2,500 Sq. Ft.
Year renovated
1990
Sq. Ft.
476
Year built
1948
Style
Single Family Residential
County
Monroe County
APN
0568 25 00043840000000
Parking Spaces
—
Basement
—
Accessible
—
HOA Dues
—
Garage
—
Features
—
Last updated by owner on Oct 9, 2026.
SF
Single-Family Residential District
The single-family residential district SF is established to implement comprehensive plan policies for areas designated SF on the comprehensive plan future land use map, especially comprehensive plan policy 1-2.1.3. The SF district is designed to accommodate single-family permanent residential development and may also include one accessory attached or detached unit per principal dwelling unit.; The SF district shall not include transient accommodations. Supportive community facilities and accessory land uses may be located within areas designated for single-family residential uses.; The single-family residential SF designation is established to: Protect the quality and character of existing single-family neighborhoods; Preserve open space; Encourage densities which are compatible with existing and anticipated future developments; Promote compatibility with natural features of the land; and Minimize the burden on supportive public services and facilities within the area.
Permitted uses
Include but are not limited to:
Housing-Group
Housing-Single unit
Jun 18, 2009 • Final
Plumbing only
Plumbing
Permit history is from public records and may be incomplete or inaccurate. Redfin and its agents make no representations about the property condition or permit status. Buyers should independently verify all information.
Property details
Interior
Interior Features
Appliances: No Appliances
Bathroom Information
# of Full Baths: 1
Exterior
Boat Slip/Dock Information
Dockage: None
Property Features
Waterfront Type: None
Waterview: No Waterview
Property Information
Deed Restrictions: Unknown
Pets: Pets Allowed
Rentals Allowed: Yes
Min Rental Days: 28
Lot Information
Zoning: SF - Single Family
Land Size: Less Than 1/4 Acre
Building Information
Year Built: 1,943
Sq. Ft. Source: Property Data Card
Building Style: Other Bldg Style
Building Style: Above Flood: Unknown
Construction: Frame
Subdivision/Neighborhood
Subdivision: Monroe Investement Co Sub (2.0)
Key West Neighborhood: Midtown West
Marathon Neighborhood: N/A
Financial
Tax Information
Taxes: $10,586.88
Tax Year: 2,025
Tax Exemptions: None
Utilities
Utility Information
Utilities: FKAA, Buyer to Verify
Has Public Sewer Hook-up
Location
Multi-Unit Information
# of Total Units: 2
Homeowners Association Information
Association Info: 1st Right of Refusal: No
Association Info: Association Fee $: 0.00
Fee Includes: None
Location Information
Side: Median
Mile Marker: 2.00
Public facts
Beds: 1
Baths: 1.0
Sq. Ft.: 476
Stories: 1.0
Lot Size: 2,500 square feet
Style: Single Family Residential
Year Built: 1948
Year Renovated: 1990
County: Monroe County
APN: 0568 25 00043840000000
Home facts updated by county records on Oct 9, 2026
Around this home
Schools
Horace O'bryant School
Public PreK-8 • Assigned • 0.2mi
3/10
Key West High School
Public 9-12 • Assigned • 0.6mi
4/10
Provided by GreatSchools
Climate risks
9/10 Flood Factor
Estimated 80%+ chance of a flood reaching the building in the next 30 years
1/10 Fire Factor
Unlikely to be in a wildfire in next 30 years
Heat Factor
We're working on getting current and accurate heat risk information for this home.
10/10 Wind Factor
99% chance of strong winds in next 30 years
1/10 Air Factor
0 unhealthy days expected this year, 0 days in 30 years
Provided by First Street
Historical weather
Key West, FL • 33040
Average low and high temperatures (°F)
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80
73
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69
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Feb
Mar
Apr
May
Jun
Jul
Aug
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Oct
Nov
Dec
Sun exposure
82/ 100
Very good sunlight
Sunscore
There appears to be minimal shading by surrounding buildings, terrain, and vegetation.
8.3 hrs
6.3 hrs
JuneDecember
Provided by Shadowmap
Estimated sale price
$886,000 – $1.07M
Sell confidently with a local market expert in Key West.