Three-Story Duplex with Fenced
New
For Sale
$622,500
410 101St St Ocean, Marathon, FL 33050
Residential, Marathon, FL
Property Size1,760 SF
Lot Size0.07 Acres
Price / SF$353.69
Days on Market2
Property Features for 410 101St St Ocean
General Information
Property type
Residential
Property subtype
Duplex
Zoning
RM - Residential Medium
Bedrooms
3
Bathrooms
3
Full bathrooms
3
Rooms
Bedroom 2, Bedroom 1, Bathroom 3, Bedroom 3, Bathroom 1, Bathroom 2
Parking features
Open
Pets allowed
Yes
Interior features
Storage
Exterior features
Fencing
Fencing
Fenced
Appliances
Washer, Dryer, Dishwasher, Refrigerator, Oven, Microwave
Subdivision
La Palma of the FL Keys (52.5)
View
Water
Directions
410 101st St, Marathon, FL 33050 Oceanside.
Standard status
Active
APN
00104461-000400
Size
1,760 SF
Lot size
0.07 Acres
Taxes and HOA fees
Tax Year
2025
Tax Description
LOT 4 LA PALMA 101 KEY VACA PB7-101 OR3235-1010 OR3240-2391
Tax Annual Amount
4271
Legal Description
LOT 4 LA PALMA 101 KEY VACA PB7-101 OR3235-1010 OR3240-2391
Utilities
Utilities
Cable Available
Heating system
Central
Cooling system
Central Air
Amenities
fenced-in backyard
washer/dryer hookup
stainless steel appliances
floor-to-ceiling high-impact windows
two pantries
Building Details
Year built
2022
Flooring type
Concrete
Building materials
CBS
Additional Structures
Storage
Listing Agency:
Florida Keys Real Estate Group
Listed By:
Brenner Scheel Casey · License #BK339103, BK3179545, SL3504409
(305) 783-3395
Added: Sep 2
Last Checked: Sep 3 at 12:06AM
MLS# 621193
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.
Investment Insights
Based on property information with market context.
This 1,760-square-foot half-duplex was built in 2022 and is arranged across three full floors. The residence includes three bedrooms and three bathrooms, with an open kitchen, living, and dining arrangement. Stainless steel appliances, two pantries, additional storage, concrete flooring, and high-impact windows contribute to the interior configuration. A washer and dryer hookup is also provided.
The 0.07-acre property includes a fenced backyard and covered parking for two vehicles. Central heating and central air conditioning serve the home, while cable is available. The property is zoned RM - Residential Medium and participates in Marathon’s deed-restricted affordable housing program.
The 0.07-acre property includes a fenced backyard and covered parking for two vehicles. Central heating and central air conditioning serve the home, while cable is available. The property is zoned RM - Residential Medium and participates in Marathon’s deed-restricted affordable housing program.
Key Highlights
- 1,760 SF half‑duplex built in 2022
- Three bedrooms and three bathrooms across three full floors
- Deed‑restricted affordable housing program property
Financial Insights
Estimated NOI and Cap Rate
NOI = area × lease_rate × (100 − vacancy) / 100 × (1 − expense_ratio). Net Operating Income — what the owner takes home each year before mortgage payments and income tax. Effective rent (asking rent minus vacancy losses) minus operating costs (taxes, insurance, maintenance, management).
NOI / Yr
$29,484
Cap rate = NOI / list price × 100. Capitalization rate — annual return on a fully cash purchase, before financing. NOI divided by price. Higher means more income per dollar invested, but usually also more risk or older condition. 5–8% is typical for stabilized commercial property; double digits often signal distressed deals.
Cap Rate
4.74%
Suggested Prices Based on Cap Rates
Cap rates vary significantly by property type, market, and asset quality.
Typical U.S. stable-market ranges:
Multifamily — 4.5% to 6.5% (Class A in primary markets often sub-5%; Class C in secondary markets 6%+)
Industrial / Logistics — 5.0% to 7.0% (compressed heavily in recent years due to e-commerce demand)
Office — 6.5% to 9%+ (wide spread post-2020; CBD Class A vs. suburban Class B varies dramatically)
Retail — 5.5% to 8.5% (grocery-anchored on the low end, unanchored strip centers higher)
Hospitality / Hotels — 7.5% to 10%+ (higher due to operational risk)
Self-Storage — 5.5% to 7.5%
Medical Office — 6.0% to 7.5%
Net Lease (single tenant, credit) — 5.0% to 7.0% depending on tenant credit and lease term
Rules of thumb:
Primary markets (NYC, SF, LA, Boston, DC) trade at lower cap rates than secondary/tertiary markets, often by 100–200 bps (bps, aka basis points; 1 bp = 0.01%).
Class A assets trade ~50–150 bps tighter than Class B, and Class B tighter than Class C.
Cap rates move inversely with price — a lower cap rate means a higher price for the same NOI.
Spread to the 10-year Treasury is a common benchmark; historically 200–400 bps over the 10-year.
Cap Rate 5%
$589,680
$589.7K
Cap Rate 7%
$421,200
$421.2K
Cap Rate 9%
$327,600
$327.6K
Market Conditions
NOI Build-Up for 1,760 SF
Vacancy — income lost from leasable area expected to sit empty during the year, subtracted from gross rent.
EGI (Effective Gross Income) — gross rent minus vacancy losses, the realistic income before paying operating costs.
OpEx (Operating Expenses) — recurring costs to operate the property (property tax, insurance, utilities, maintenance, management); excludes financing and capital improvements.
NOI (Net Operating Income) — income a property generates after operating costs but before financing and taxes.
Gross rent
$45.0K $25.56/SF
− Vacancy
−$2.9K −$1.63/SF
EGI
$42.1K $23.93/SF
− OpEx
−$12.6K −$7.18/SF
NOI
$29.5K $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 rates vary significantly by property type, market, and asset quality.
Typical U.S. stable-market ranges:
Multifamily — 4.5% to 6.5% (Class A in primary markets often sub-5%; Class C in secondary markets 6%+)
Industrial / Logistics — 5.0% to 7.0% (compressed heavily in recent years due to e-commerce demand)
Office — 6.5% to 9%+ (wide spread post-2020; CBD Class A vs. suburban Class B varies dramatically)
Retail — 5.5% to 8.5% (grocery-anchored on the low end, unanchored strip centers higher)
Hospitality / Hotels — 7.5% to 10%+ (higher due to operational risk)
Self-Storage — 5.5% to 7.5%
Medical Office — 6.0% to 7.5%
Net Lease (single tenant, credit) — 5.0% to 7.0% depending on tenant credit and lease term
Rules of thumb:
Primary markets (NYC, SF, LA, Boston, DC) trade at lower cap rates than secondary/tertiary markets, often by 100–200 bps (bps, aka basis points; 1 bp = 0.01%).
Class A assets trade ~50–150 bps tighter than Class B, and Class B tighter than Class C.
Cap rates move inversely with price — a lower cap rate means a higher price for the same NOI.
Spread to the 10-year Treasury is a common benchmark; historically 200–400 bps over the 10-year.
Cap Rate 5%
$589,680
Cap Rate 7%
$421,200
Cap Rate 9%
$327,600
Alternative Uses
Best Use
Multifamily LT 5
$421.2K
$368.6K – $491.4K
NOI $29,484 @ 7.0% cap · market cap 4.74%
Second Best
Apartment 5plus
$390.2K
$341.4K – $455.2K
NOI $27,311 @ 7.0% cap · market cap 4.39%
Theoretical Best
Office A
$707.9K
$619.5K – $825.9K
NOI $49,556 @ 7.0% cap · market cap 7.96%
Zoning and permitted uses should be independently verified with authorities.
Property Analytics
Property Profile
Current Use
Lease Details
1
Residential units
Location Intelligence
Trade Area within ½ mile
545
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
Market
Vacancy Rate% for Multifamily in South region
Questions? Ask Rey
Realmo’s AI knows this listing — price, zoning, demand, history. Ask anything.
Frequently Asked Questions
What type of property is this?
Duplex - Deed-restricted housing residence with open living areas, covered parking, and central heating and air conditioning.
Where is this duplex located?
The property is located at 410 101St St Ocean Marathon, FL.
What is the asking price?
The asking price for this property is $622,500.
What are key features of this property?
This property features: 1,760 SF half‑duplex built in 2022; Three bedrooms and three bathrooms across three full floors; Deed‑restricted affordable housing program property
