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$3,850,000 Just Listed

  • For Sale
  • Active
  • Single Family
  • 4 Beds
  • 3 Full Baths
  • 1 Partial Bath
  • 3,381 Sq. Ft.
  • Updated 9 hours ago
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Rare opportunity to own this corner bay front 4 bedroom 3.5 bath home in the loved neighborhood of Key Colony Beach located in Marathon! This home is newly renovated with one of the best views to sit back relax and enjoy the boats going by or having quick access to the Atlantic Ocean for optimal fishing, lobstering, diving, and stunning views on the boat. With plenty of deep water and a 60 ft dock with a 20,000-pound boatlift, water and electric at the dock, and fish cleaning station, everything is ready to go for all your boating needs. But when it's time to relax enjoy the oasis of the pool that can be cooled for the summer or if you're wanting to escape a cold winter to the keys the pool can also be heated. Featuring inside there are 2 living rooms, a stunning kitchen, and custom wood stairs to go upstairs to the bedrooms, the primary has its own split stairs to its side for great privacy. There is also a mini primary bedroom with its own bathroom along with his and her closest. The property has been a very successful six figure earning rental when it is not being utilized by the owners. Having a 2 car garage, 4 car fitting driveway, and space to the left of the driveway for a boat trailer there is plenty of parking for guest and friends to come enjoy the stunning view and atmosphere of this property!

Full Property Details for 770 9th St

General

  • Price: $3,850,000
  • Taxes: $14,704 (2025)
  • Status: Active
  • Type: Single Family
  • Source: MidFloridaRegionalMLS
  • MLS ID: OM719377
  • Updated: 2/23/2026
  • Added to Site: 1 day(s) ago

Rental Information

  • Min. Lease: 1 Week

Interior

  • Number of Rooms: 3
  • Interior Features: PrimaryBedroom Upstairs, Stone Counters, Thermostat, Walk-In Closet(s)
  • Appliances: Dishwasher, Dryer, Ice Maker, Microwave, Refrigerator, Washer
  • Furnishings: Turnkey
  • Flooring: Tile, Vinyl

Rooms

Bathrooms

  • Total Bathrooms: 4
  • Full Bathrooms: 3
  • Half Bathrooms: 1

Bedrooms

  • Total Bedrooms: 4

Other Rooms

  • Laundry: Laundry Room

Additional Information

  • Pool: Yes
  • Private Pool: Yes
  • Pool Description: Heated, In Ground

Exterior

  • Exterior Features: Private Yard

Parking

  • Garage: Yes
  • Attached garage: Yes
  • Garage Spaces: 2
  • Covered Spaces: 2

Location

  • Area: 33051 - Key Colony Beach
  • County: Monroe
  • Development Name: 33051 - Key Colony Beach
  • Subdivision: KEY COLONY BEACH 1ST ADD
  • Driving Directions: headed south on overseas HWY turn left onto Sadowski CSWY then a right onto W Ocean Dr, and a right onto 9th street, the house is the very end on the right
  • Direction Faces: South

Community

  • Community Name: 33051 - Key Colony Beach

Heating & Cooling

  • Cooling Type: Central Air
  • Heating Type: Electric

Utilities

  • Sewer: Public Sewer
  • Water: Public
  • Utility Description: Cable Connected, Sewer Connected, Water Connected

Structural Information

  • Exterior Const.: Stucco
  • Roof: Tile
  • Stories/Levels: Two
  • Square Feet: 3,381
  • Sq. Ft. Source: Public Records
  • Year Built: 1993

Lot Features

  • Property View: Water
  • Lot Size (Acres): 0.25
  • Lot Size (Sq. Ft.): 10,750
  • Lot Size: 10750
  • Frontage: Street Paved
  • Street/Road Desc.: Paved

Water Features

  • Water Front: Yes
  • Water View: Yes
  • Water Access: Yes
  • Water Access Desc: Bay/Harbor, Canal - Saltwater, Gulf/Ocean
  • Water Extras: Yes
  • Water Front Desc.: Bay/Harbor

Financial Considerations

  • Tax Amount: $14,704.27
  • Tax Year: 2025

Disclosures and Reports

  • Ownership: Fee Simple
  • Special Conditions: None
  • Legal Description: BK 9 N 1/2 LT 33 KEY COLONY BEACH FIRST ADDN AMD PLAT PB4-11 OR411-483 OR792-386D/C OR792-387 OR792-388 OR792-389 OR974-216 OR1201-452/65MERG OR1946-866/67 OR2699-374/75
  • Flood Zone Info: AE8
  • APN: 75110000000
  • Property ID: 75110000000
  • Block/Lot/Section: 9

Listed by Keller Williams Cornerstone Re

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Listing agent

— 770 9th St —

  • Keller Williams Cornerstone Re

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Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

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Be ready to buy your new home!

with our affiliated lender
NMLS#: 1598647

Get Pre-Approved

Schools serving 770 9th St

School District:Monroe County School District, Middle Torch Key, FL
NameGradesDistance
Stanley Switlik Elementary School
3400 Overseas Highway, Marathon, FL 33050
PK-54.6 mi
Marathon School
350 Sombrero Beach Road, Marathon, FL 33050
6-123.7 mi
Disclaimer: School attendance boundaries provided by Pitney Bowes and are for reference only. Contact the school directly to verify enrollment eligibility.

Price & Sales History for 770 9th St Get Price Alerts and Save Property

Date
Details
Price
Change
Source
2/23/2026
Listed
$3,850,000
180%
MLS
8/12/2014
Sold
$1,375,000
—
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 770 9th St

Year
Property Taxes
Change
Tax Assessment
Change
2024
$13,700
—
$1,547,543
12%
2024
$13,700
1%
$1,378,671
1%
2023
$13,615
-12%
$1,360,762
-9%
2021
$15,404
1%
$1,493,557
-4%
2022
$15,314
-1%
$1,551,151
3%
2021
$15,404
3%
$1,504,146
3%
2019
$14,973
10%
$1,466,275
10%
2018
$13,662
20%
$1,332,978
10%
2017
$11,425
-1%
$1,211,798
3%
2016
$11,593
—
$1,178,084
1%
2015
$11,605
15%
$1,162,703
21%
2014
$10,052
6%
$960,594
10%
2013
$9,469
—
$873,268
—
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.

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

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NMLS#: 1598647

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Listed by Keller Williams Cornerstone Re

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770 9th Street, Key Colony Beach, FL 33051 (MLS# OM719377) is a Single Family property with 4 bedrooms, 3 full bathrooms and 1 partial bathroom. 770 9th Street is currently listed for $3,850,000 and was received on February 23, 2026. Want to learn more about 770 9th Street? Do you have questions about finding other Single Family 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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