Duplex opportunity in the heart of Marathon with two legal addresses: 10881 7th Avenue Gulf and 10883 7th Avenue Gulf. This updated DUPLEX offers excellent flexibility for investors, owner occupants, or those looking to live in one unit and rent the other. The first floor residence features 3 bedrooms, 2.5 baths, a private entrance, its own patio area, separate laundry, and separate electric and water meters. It is currently rented for $3,700/month on a month to month basis, with the tenant open to a one year lease. The second floor unit offers 1 bedroom, 1 bath, its own private staircase and entrance, a dedicated outdoor sitting area, separate laundry, and separate utility meters. The upstairs unit is currently vacant and was most recently rented for $3,000/month, providing demonstrated combined rental potential of approximately $6,700/month or $80,400 annually. The property has been renovated and updated and offers exceptional parking for 5+ vehicles, with ample room for cars, boats, trailers and more. Adding even more value, approved plans convey with the sale for a substantial two-story garage and storage building at the rear of the property. The approved design includes approximately 2,768 sq. ft. of enclosed space, with a 1,440 sq. ft. shared garage on the first floor and additional dedicated and shared storage areas, two bathrooms, and mechanical space upstairs. A rare opportunity to combine strong rental income, separate living spaces, extensive parking, and future garage/storage potential, all offered at $1,200,000.
Details
MLS #
621548
Listing Type
For Sale
Style
Duplex
Sub-Type
Resale
Status
Active
Year
1973
Days On Site
6
Listing Provided By
Coldwell Banker Schmitt Real Estate Co. | Jesus Parra
Features
Bed(s)
4
Bath(s)
4 Total
SQ Feet
1,888
Units
2
Zoning
RM - Residential Medium
Acreage
0.22
Water Front
None
Property View
Open Water View
Taxes
Property
6356
Area Information
State
FL
County
Monroe
City
MARATHON
Zip Code
33050
Area
15 Sombrero Bch Rd to Vaca Cut Gulfside
Community Name
Key Colony Sub (53.0)
Listing VS Median (in Key Colony Sub (53.0))
Price: $1,200,000
low | high
Med: $990,000
67.5% of Average
sqft: 1,888
low | high
Med: 1,242
84.216101694915% of Average
$ / sqft: $636
low | high
Med: $797
24.589371980676% of Average
On site: 6
low | high
Med: 39
15.384615384615% of Average
Sourced by Back At You
Market Activity 33050
Date
Sales
Avg $ Per SqFt
Min Sale Price
Max Sale Price
Med Sale Price
Date: Sep 2026
Sales: 1
Avg $ Per SqFt: $527.47
Min Sale Price: $720,000
Max Sale Price: $720,000
Med Sale Price: $720,000
Date: Aug 2026
Sales: 8
Avg $ Per SqFt: $698.46
Min Sale Price: $115,000
Max Sale Price: $1,550,000
Med Sale Price: $625,000
Date: Jul 2026
Sales: 13
Avg $ Per SqFt: $827.55
Min Sale Price: $160,000
Max Sale Price: $3,000,000
Med Sale Price: $899,000
Date: Jun 2026
Sales: 14
Avg $ Per SqFt: $805.66
Min Sale Price: $410,000
Max Sale Price: $2,625,000
Med Sale Price: $1,007,500
Date: May 2026
Sales: 18
Avg $ Per SqFt: $765.38
Min Sale Price: $170,000
Max Sale Price: $3,475,000
Med Sale Price: $534,500
Date: Apr 2026
Sales: 23
Avg $ Per SqFt: $714.47
Min Sale Price: $160,000
Max Sale Price: $3,999,999
Med Sale Price: $857,000
Date: Mar 2026
Sales: 24
Avg $ Per SqFt: $684.24
Min Sale Price: $8,500
Max Sale Price: $4,100,000
Med Sale Price: $722,500
Date: Feb 2026
Sales: 28
Avg $ Per SqFt: $691.5
Min Sale Price: $9,500
Max Sale Price: $5,500,000
Med Sale Price: $582,500
Date: Jan 2026
Sales: 15
Avg $ Per SqFt: $596.11
Min Sale Price: $255,000
Max Sale Price: $3,250,000
Med Sale Price: $925,000
Date: Dec 2025
Sales: 19
Avg $ Per SqFt: $700.61
Min Sale Price: $1,000
Max Sale Price: $4,600,000
Med Sale Price: $900,000
Date: Nov 2025
Sales: 18
Avg $ Per SqFt: $664.77
Min Sale Price: $120,000
Max Sale Price: $4,950,000
Med Sale Price: $620,000
Date: Oct 2025
Sales: 25
Avg $ Per SqFt: $768.34
Min Sale Price: $130,000
Max Sale Price: $4,500,000
Med Sale Price: $799,500
Sourced by Back At You
Sep 2026
Sales:
1
Avg $ Per SqFt:
$527.47
Min Sale Price:
$720,000
Max Sale Price:
$720,000
Med Sale Price:
$720,000
Aug 2026
Sales:
8
Avg $ Per SqFt:
$698.46
Min Sale Price:
$115,000
Max Sale Price:
$1,550,000
Med Sale Price:
$625,000
Jul 2026
Sales:
13
Avg $ Per SqFt:
$827.55
Min Sale Price:
$160,000
Max Sale Price:
$3,000,000
Med Sale Price:
$899,000
Jun 2026
Sales:
14
Avg $ Per SqFt:
$805.66
Min Sale Price:
$410,000
Max Sale Price:
$2,625,000
Med Sale Price:
$1,007,500
May 2026
Sales:
18
Avg $ Per SqFt:
$765.38
Min Sale Price:
$170,000
Max Sale Price:
$3,475,000
Med Sale Price:
$534,500
Apr 2026
Sales:
23
Avg $ Per SqFt:
$714.47
Min Sale Price:
$160,000
Max Sale Price:
$3,999,999
Med Sale Price:
$857,000
Mar 2026
Sales:
24
Avg $ Per SqFt:
$684.24
Min Sale Price:
$8,500
Max Sale Price:
$4,100,000
Med Sale Price:
$722,500
Feb 2026
Sales:
28
Avg $ Per SqFt:
$691.5
Min Sale Price:
$9,500
Max Sale Price:
$5,500,000
Med Sale Price:
$582,500
Jan 2026
Sales:
15
Avg $ Per SqFt:
$596.11
Min Sale Price:
$255,000
Max Sale Price:
$3,250,000
Med Sale Price:
$925,000
Dec 2025
Sales:
19
Avg $ Per SqFt:
$700.61
Min Sale Price:
$1,000
Max Sale Price:
$4,600,000
Med Sale Price:
$900,000
Nov 2025
Sales:
18
Avg $ Per SqFt:
$664.77
Min Sale Price:
$120,000
Max Sale Price:
$4,950,000
Med Sale Price:
$620,000
Oct 2025
Sales:
25
Avg $ Per SqFt:
$768.34
Min Sale Price:
$130,000
Max Sale Price:
$4,500,000
Med Sale Price:
$799,500
Jesus Parra of Coldwell Banker Schmitt Real Estate Co. – (786) 282-9281 – jesus@cbschmitt.com
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MLS Internet Data Exchange (IDX) information is provided exclusively for consumers’ personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing, and that the data is deemed reliable but is not guaranteed accurate by the Florida Keys Board of Realtors.
The data relating to real estate for sale on this web site come s in part from the Internet Data Exchange program of the Marathon and Lower Keys Association of REALTORS®, Inc. MLS. Real Estate listings held by brokerage firms other than Coldwell Banker Schmitt are marked with the MLS logo and detailed information about them includes the name of the listing broker’s office.
Jesus Parra of Coldwell Banker Schmitt Real Estate Co. – (786) 282-9281 – jesus@cbschmitt.com