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$1,275,000

  • For Sale
  • Active
  • Duplex
  • 3 Beds
  • 3 Full Baths
  • 2,166 Sq. Ft.
  • Updated 6 hours ago

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Discover exceptional waterfront living in the heart of Key Colony Beach. This concrete constructed half duplex offers over 2,100 square feet with three bedrooms, three bathrooms inside and 37.5 feet of dockage. A rare and highly desirable interior staircase welcomes you from the above flood first floor, seamlessly connecting both levels of the home. Downstairs is completely built above flood and features a one bedroom, one bathroom suite with additional living area, ideal for guests or extended family. Step through sliding glass doors to a spacious wood deck and 37.5 feet of dockage. Enjoy the ocean breeze and shade under the lush buttonwood tree. Upstairs, enjoy open concept living with a bright and airy kitchen, dining, and living area designed for effortless entertaining. The primary suite boasts a recently renovated bathroom with step-in tiled shower, quartz topped double vanity and tiled flooring. Nearby, a second guest bedroom offers its own ensuite for added comfort and privacy. Recent updates include a newer AC, 2018 standing seam metal roof, and termite tenting with a transferable warranty, providing peace of mind for years to come. With its rare downstairs living, expansive square footage, and thoughtfully designed layout, this property presents a unique opportunity to own a well-cared-for waterfront residence in one of the most desirable areas of the Florida Keys. Key Colony Beach welcomes primary and seasonal guests with the 9-hole par 3 golf course, tennis and pickle ball courts, Sunset Park, City Hall, police department, multiple restaurants, boat ramp and marina. Enjoy the island lifestyle with amenities galore!

Full Property Details for 391 10th St

General

  • Price: $1,275,000
  • Taxes: $6,525 (2025)
  • Status: Active
  • Type: Duplex
  • Source: 927
  • MLS ID: 619329
  • Updated: 5/13/2026
  • Added to Site: 41 day(s) ago

Interior

  • Interior Features: Entrance Foyer, Quartz Countertops, Storage
  • Appliances: Stainless Steel Appliance(s), Dishwasher, Disposal, Dryer, Microwave, Oven, Refrigerator, Washer
  • Flooring: Tile, Laminate

Rooms

Bathrooms

  • Total Bathrooms: 3
  • Full Bathrooms: 3

Bedrooms

  • Total Bedrooms: 3

Additional Information

  • Shared Amenities: Community Boat Ramp, Bike Paths, Tennis Court(s)
  • Security/Safety: Patrolled Area

Exterior

  • Exterior Features: Fencing
  • Deck/Patio: Open Porch/Balcony, Deck
  • Porch/Patio/Deck: Open Porch/Balcony, Deck

Parking

  • Parking Features: Open, Guest, Off Street

Location

  • Area: 17 - Vaca Cut - Both Sides Holiday Inn/Key Colony
  • County: Monroe
  • Subdivision: Key Colony Bch 1st Addn Amd Plat (53.5)
  • Driving Directions: From US-1, turn onto Sadowski Causeway. Turn right onto West Ocean Drive. Right onto 10th Street. Property will be on left side with sign out front.

Community

  • Assoc. Fees Include: None
  • Pets Allowed: Yes

Heating & Cooling

  • Central air: Yes
  • Air Conditioning: Yes
  • Cooling Type: Central Air, Ceiling Fans(s)

Structural Information

  • Architectural Style: Above Flood
  • Construction: CBS
  • Roof: Metal
  • Windows/Doors: Awning Windows, Sliding Glass Doors, Shutters
  • Square Feet: 2,166
  • Sq. Ft. Source: Property Data Card
  • Year Built: 1988

Lot Features

  • Property View: Canal
  • Lot Size (Acres): 0.09
  • Lot Size (Sq. Ft.): 4,125
  • Zoning: R-2A - Key Colony Two Family

Water Features

  • Water Front: Yes
  • Water View: Yes
  • Water Front Desc.: Canal Front

Financial Considerations

  • Tax Amount: $6,525.23
  • Tax Year: 2025

Disclosures and Reports

  • Legal Description: BK 11 NLY 1/2 LT 14 KEY COLONY BEACH FIRST ADDN AMENDED PLAT PB4-11 SHELTER KEY
  • Flood Zone: AE
  • APN: 76300000000

Listed by Ocean Sotheby's International, Ally Kelley (727) 459-0493 and Ocean Sotheby's International, Jo Ann Cook (305) 360-7968

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Listing agents

— 391 10th St —

  • Ally Kelley

    Ocean Sotheby's International

  • Jo Ann Cook

    Ocean Sotheby's International

Get Pre-Approved Today

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Schools serving 391 10th St

School District:Monroe County School District, Middle Torch Key, FL
NameGradesDistance
Stanley Switlik Elementary School
3400 Overseas Highway, Marathon, FL 33050
PK-54.5 mi
Marathon School
350 Sombrero Beach Road, Marathon, FL 33050
6-123.6 mi
Disclaimer: School attendance boundaries provided by ATTOM Data Solutions and are for reference only. Contact the school directly to verify enrollment eligibility.

Price & Sales History for 391 10th St Get Price Alerts and Save Property

Date
Details
Price
Change
Source
4/02/2026
Listed
$1,275,000
183.96%
MLS
6/27/2012
Sold
$449,000
—
Public Record
Get Price Alerts and Save Property
Disclaimer: Historical sales information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

Tax History for 391 10th St

Year
Property Taxes
Change
Tax Assessment
Change
2024
$6,493
—
$680,158
3%
2024
$6,493
3%
$660,990
3%
2023
$6,288
3%
$641,738
6%
2021
$6,105
1%
$604,900
-3%
2022
$6,054
-1%
$623,047
12%
2021
$6,105
2%
$555,612
-3%
2019
$5,981
9%
$570,881
6%
2018
$5,468
1%
$539,659
-1%
2017
$5,407
-2%
$547,293
-1%
2016
$5,523
10%
$551,537
15%
2015
$5,040
4%
$479,507
10%
2014
$4,839
9%
$435,916
10%
2013
$4,430
—
$396,288
—
View All
Disclaimer: Historical tax information is derived from public records provided by the county offices. Information is not guaranteed and should be independently verified.

Estimate the Cost for 391 10th St

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*These costs are estimates, and the interest rates assume exceptional credit standing.

Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Listed by Ocean Sotheby's International, Ally Kelley (727) 459-0493 and Ocean Sotheby's International, Jo Ann Cook (305) 360-7968

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391 10th Street, Key Colony Beach, FL 33051 (MLS# 619329) is a Duplex property with 3 bedrooms and 3 full bathrooms. 391 10th Street is currently listed for $1,275,000 and was received on April 02, 2026. Want to learn more about 391 10th Street? Do you have questions about finding other Duplex real estate for sale in Key Colony Beach? You can browse all Key Colony Beach real estate or contact a Coldwell Banker agent to request more information.

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