Updated Duplex with Central
For Sale
$750,000
285 A 66Th Street, Marathon, FL 33050
Residential, Marathon, FL
Property Size1,770 SF
Lot Size0.12 Acres
Price / SF$423.73
Days on Market51
Property Features for 285 A 66Th Street
General Information
Property type
Residential Multi Family
Property subtype
Duplex
Zoning
RM - Residential Medium
Bedrooms
4
Bathrooms
2
Full bathrooms
2
Rooms
Bathroom 2, Bedroom 4, Bedroom 2, Bedroom 3, Bathroom 1, Bedroom 1
Parking features
Open
Security features
Security
Pets allowed
Yes
Appliances
Washer, Dryer, Dishwasher, Refrigerator, Range, Oven, Microwave
Subdivision
Puerta Del Sol (50.5)
View
Water
Standard status
Active
APN
00341690-000000
Size
1,770 SF
Lot size
0.12 Acres
Taxes and HOA fees
Tax Year
2025
Tax Description
BK D LT 23 PUERTA DEL SOL PB3-117 KEY VACA
Tax Annual Amount
6573
Legal Description
BK D LT 23 PUERTA DEL SOL PB3-117 KEY VACA
Utilities
Utilities
Cable Available
Heating system
Central
Cooling system
Central Air
Building Details
Year built
1971
Flooring type
Tile
Building materials
CBS, Concrete
Roof type
Shingle
Listing Agency:
Florida Keys Real Estate Group
Listed By:
Brenner Scheel Casey · License #BK339103, BK3179545, SL3504409
(305) 783-3395
Added: Aug 27
Changed: Sep 26
Last Checked: Oct 16 at 7:06PM
MLS# 621145
Copyright © 2026 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.
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Investment Insights
Based on property information with market context.
This full duplex contains two living spaces within 1,770 square feet on a 0.12-acre lot. Both units have updated kitchens with cabinetry, countertops, and appliances, along with renovated bathrooms and replacement flooring. The property also includes upgraded electrical service, tile flooring, central heating, central air, open parking, and cable availability. Construction is CBS and concrete, with a shingle roof and a 1971 build date.
Located in Marathon, Florida, the property is zoned RM - Residential Medium. Included appliances are washers, dryers, dishwashers, refrigerators, ranges, ovens, and microwaves, providing a substantial existing equipment package for the duplex.
Located in Marathon, Florida, the property is zoned RM - Residential Medium. Included appliances are washers, dryers, dishwashers, refrigerators, ranges, ovens, and microwaves, providing a substantial existing equipment package for the duplex.
Key Highlights
- Full duplex with 1,770 square feet on a 0.12‑acre lot
- Both units have updated kitchens, renovated bathrooms, and replaced flooring
- Electrical system has been upgraded
Financial Insights
Estimated NOI and Cap Rate
NOI / Yr
$29,652
Cap Rate
3.95%
Suggested Prices Based on Cap Rates
Cap Rate 5%
$593,040
$593.0K
Cap Rate 7%
$423,600
$423.6K
Cap Rate 9%
$329,467
$329.5K
Market Conditions
NOI Build-Up for 1,770 SF
Gross rent
$45.2K $25.56/SF
− Vacancy
−$2.9K −$1.63/SF
EGI
$42.4K $23.93/SF
− OpEx
−$12.7K −$7.18/SF
NOI
$29.7K $16.75/SF
Area
Monroe County, FL
Vacancy
6.37%
Lease Rate
$25.56 /SF/Yr
Expense Ratio
30.00%
Simulate Cap Rate and NOI
Suggested Prices Based on Cap Rates
Cap Rate 5%
$593,040
Cap Rate 7%
$423,600
Cap Rate 9%
$329,467
Alternative Uses
Best Use
Multifamily LT 5
$423.6K
$370.7K – $494.2K
NOI $29,652 @ 7.0% cap · market cap 3.95%
Second Best
Apartment 5plus
$392.4K
$343.3K – $457.8K
NOI $27,466 @ 7.0% cap · market cap 3.66%
Theoretical Best
Office A
$712.0K
$623.0K – $830.6K
NOI $49,838 @ 7.0% cap · market cap 6.65%
Zoning and permitted uses should be independently verified with authorities.
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Property Analytics
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Current Use
Lease Details
2
Residential units
Location Intelligence
Trade Area within ½ mile
538
Businesses Nearby
Explore this area
Business Placement
Demographics for 33050, FL
10,479
Population
7,314
Households
1.4
Avg Household Size
50
Median Age
34%
College-Educated
90%
High-School Grad
9.1 sq mi
ZIP Area
1,152
Density / Sq Mi
$83,243
Median Household Income
$40,006
Median Earnings
$1,611
Median Rent
$705,600
Median Home Value
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Cap Rate, Value Estimation, Potential NOI and more
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Market
Vacancy Rate% for Multifamily in South region
Frequently Asked Questions
What type of property is this?
Duplex - Two separate living spaces feature renovated kitchens, bathrooms, flooring, and upgraded electrical systems.
Where is this duplex located?
The property is located at 285 A 66Th Street Marathon, FL.
What is the asking price?
The asking price for this property is $750,000.
What are key features of this property?
This property features: Full duplex with 1,770 square feet on a 0.12‑acre lot; Both units have updated kitchens, renovated bathrooms, and replaced flooring; Electrical system has been upgraded
