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770 9th Street, 
Key Colony Beach, FL 33051

$3,850,000


4

Beds


4

Baths


3,381

Sq Ft


Single Family


Virtual Tour

Active

Listed by

Kim Hiers

Keller Williams Cornerstone Re

Last updated:

March 19, 2026, 12:06 PM

MLS#

OM719377

Source:

MFRMLS

About This Home

770 9th Street

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!

Home Facts

Single Family

4 Baths

4 Bedrooms

Built in 1993

Price Summary

3,850,000

$1,138 per Sq. Ft.

MLS #:

OM719377

Last Updated:

March 19, 2026, 12:06 PM

Added:

a month ago


Rooms & Interior

Bedrooms

Total Bedrooms:

4

Bathrooms

Total Bathrooms:

4

Full Bathrooms:

3

Interior

Living Area:

3,381 Sq. Ft.


Structure

Structure

Building Area:

4,647 Sq. Ft.

Year Built:

1993


Lot

Lot Size (Sq. Ft):

10,750


Finances & Disclosures

Finances

Price:

$3,850,000

Price per Sq. Ft:

$1,138 per Sq. Ft.

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The information being provided by Stellar Mls is for the consumer's personal, non-commercial use and may not be used for any purpose other than to identify prospective properties consumer may be interested in purchasing. Any information relating to real estate for sale referenced on this web site comes from the Internet Data Exchange (IDX) program of the Stellar Mls. Keller Williams Cornerstone Re is not a Multiple Listing Service (MLS), nor does it offer MLS access. This website is a service of Keller Williams Cornerstone Re, a broker participant of Stellar Mls. This web site may reference real estate listing(s) held by a brokerage firm other than the broker and/or agent who owns this web site. The accuracy of all information, regardless of source, including but not limited to open house information, square footages and lot sizes, is deemed reliable but not guaranteed and should be personally verified through personal inspection by and/or with the appropriate professionals. The data contained herein is copyrighted by Stellar Mls and is protected by all applicable copyright laws. Any unauthorized dissemination of this information is in violation of copyright laws and is strictly prohibited. Properties in listings may have been sold or may no longer be available. Copyright 2026 Stellar Mls. All rights reserved.

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Contact an Agent

Yes, I would like more information. Please use and/or share my information with a Coldwell Banker ® affiliated agent to contact me about my real estate needs. By clicking Contact, I request to be contacted by phone or text message and consent to being contacted by automated means. I understand that my consent to receive calls or texts is not a condition of purchasing any property, goods, or services. Alternatively, I understand that I can access real estate services by email or I can contact the agent myself.

If a Coldwell Banker affiliated agent is not available in the area where I need assistance, I agree to be contacted by a real estate agent affiliated with another brand owned or licensed by Anywhere Real Estate (BHGRE®, CENTURY 21®, Corcoran®, ERA®, or Sotheby's International Realty®). I acknowledge that I have read and agree to the terms of use and privacy notice.