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669 S Mashta Dr, 
Key Biscayne, FL 33149

$4,950,000


3

Beds


4

Baths


3,382

Sq Ft


Single Family


Virtual Tour

Pending

Listed by

Miriam Poggio

Bautista Carugati

One Sotheby'S International Realty

Last updated:

January 10, 2026, 09:01 AM

MLS#

A11922444

Source:

SEFMLS

About This Home

669 S Mashta Dr

A beautifully reimagined home on one of Key Biscayne’s most desirable streets, South Mashta Drive. With its bold charcoal façade and distinctive presence, this residence stands out immediately while maintaining a warm island charm that makes it feel welcoming from the moment you arrive. Surrounded by mature trees and lush greenery, the setting offers both atmosphere and privacy. Inside, vaulted ceilings and expansive windows fill the space with natural light, creating a soft and inviting ambiance. The great room features a stone fireplace, wide-plank wood floors, and a natural flow to the terrace and pool, bringing effortless connection between indoor comfort and outdoor enjoyment. Every space reflects a carefully curated, cozy feel that enhances the character of the home. The renovated master bathroom offers calming finishes and a serene atmosphere. A private suite provides the perfect accommodation for guests or extended family. Set on a generous 10,000 sq ft lot and enhanced with impact windows, updated lighting, a newer roof, and thoughtful design details, this residence blends timeless appeal, warmth, and the unique island charm that defines Key Biscayne living. A rare opportunity to own a home that feels both distinctive and deeply inviting, in one of the most coveted locations on the island.

Home Facts

Single Family

4 Baths

3 Bedrooms

Built in 1960

Price Summary

4,950,000

$1,463 per Sq. Ft.

MLS #:

A11922444

Last Updated:

January 10, 2026, 09:01 AM


Rooms & Interior

Bedrooms

Total Bedrooms:

3

Bathrooms

Total Bathrooms:

4

Full Bathrooms:

3

Interior

Living Area:

3,382 Sq. Ft.


Structure

Structure

Architectural Style:

Detached, Two Story

Building Area:

3,382 Sq. Ft.

Year Built:

1960


Lot

Lot Size (Sq. Ft):

10,000


Finances & Disclosures

Finances

Price:

$4,950,000

Price per Sq. Ft:

$1,463 per Sq. Ft.

Source:SEFMLS
Information deemed reliable but not guaranteed. Information is provided, in part, by Greater Miami MLS. This information being provided is for consumer's personal, non-commercial use and may not be used for any other purpose other than to identify prospective properties consumers may be interested in purchasing.

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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.