Home in 669 S Mashta Dr Key Biscayne with MLS# A11922444

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.

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669 S Mashta Dr, Key Biscayne, FL 33149

Price
Price:
$4,950,000.00
Original List Price:
$4,950,000.00
Close Price:
$4,750,000.00
Transaction closed on:
February 4, 2026
Property Status and Type
Listing Type:
Sold
Status:
Closed
Contingency:
No Contingencies
Special Sale Conditions:
Listed As Is
Listing Category:
Residential
Property Type:
Single Family House
MLS Number:
A11922444
Description of Last Important Update:
Closed
Last Major Update on:
February 14, 2026 6:42 pm
Rooms Distribution
Bedrooms:
3
Bathrooms Total:
4
Full Bath:
3
Half Bath:
1
Room Type:
Den
Measures
Living Area:
3,382 Sqft
Built-Up Area:
3,382 Sqft
Lot Area:
10,000 Sqft
Lot Size Unit:
Square Feet
Lot Features:
Quarter To Half Acre Lot
Property Features
View from the Property:
Garden
Waterfront:
No
Swimming Pool Features:
Pool, In Ground
Furnished:
Unfurnished
Appliances:
Dryer, Dishwasher, Disposal, Microwave, Refrigerator, Washer, Gas Range, Electric Water Heater
Interior:
First Floor Entry, Dining Area, Separate Formal Dining Room, Upper Level Primary, Separate Shower
Exterior:
Patio, Lighting, Outdoor Shower, Storm Security Shutters, Security High Impact Doors
Patio and Porch:
Patio
Air Conditioning
Air Conditioning System:
Central Air, Electric
Heating
Heating System:
Central
Property Entrance Faces:
West
Water Access Description:
None
Construction
Year Built:
1960
Year Built Details:
Resale
Roof:
Other
Architectural Style:
Two Story, Detached
Levels:
Two
Construction Materials:
Block
Flooring:
Wood, Marble, Hardwood
Stories:
2
Possible Use:
Investment
Taxes and Expenses
Tax Annual Amount:
$22,036.00
Tax Year:
2025
Association Fee Frequency:
Monthly
Property Tax Status:
Tax Reflects No Exemptions
Parking
Garage Spaces:
0
Covered Spaces:
0
Parking Features:
Driveway
Utilities
Sewer:
Public Sewer
Utilities Available:
Cable Available
Water Source:
Public
Community
Pets Allowed?:
Size Limit (There are size restrictions on allowed pets), Yes
Subdivision Name:
MASHTA ISLAND
Community Features:
Other
Senior Community:
No
Restrictions:
Okay to Lease
Terms
Listing Terms Considered by Seller:
Cash, Conventional
Occupant Type:
Vacant
Buyer Possession:
Close Of Escrow, Closing And Funding
Lease Considered:
No
Zoning and Legal
Tax Legal Description:
5-6 55 42 MASHTA ISLAND PB 60-93 LOT 11 BLK 2 LOT SIZE 100.000 X 100 OR 19565-4268 03/2001 1
Real Estate Folio Number (Parcel Number):
24-52-05-008-0180
Zoning Description:
2001
Title to the property is held by owner as:
Limited Partnership
Public Schools Assigned
High School:
Coral Gables
Middle Or Junior School:
Ponce De Leon
Listing History
Originally published on:
November 30, 2025 7:45 pm
Active on the market since:
November 30, 2025
Price change occurred on:
November 30, 2025 3:01 pm
Listing Status Last Changed On:
February 14, 2026 6:42 pm
Photos updated on:
December 1, 2025 1:03 am
Last Modified:
February 14, 2026 11:43 pm
Additional Information
Housing Older Persons Act:
Unverified
Flood Zone:
AE
Type of Association:
Other
Rooms Description:
Den/Library/Office
Style:
Pool Only
Num Ceiling Fans:
2
Municipal Code:
24
Subdivision Number:
8
Buy State:
Florida
Buyer Countryof Residence:
USA
Courtesy of:
One Sotheby's International Realty
Attribution:
Not provided
Location
Street Name:
Mashta Dr
Street Number:
669
City:
Key Biscayne
State:
Florida
Zip Code:
33149
County:
Miami-Dade
Latitude:
N25° 41' 8.4''
Longitude:
W81° 49' 30.1''
Street Direction Prefix:
S
Property Map

Neighborhood Stats

Source: U.S. Census Bureau, ACS 5-Year Estimates

Median Household Income $171,982
Median Home Value $1,231,500
Median Rent $3,501/mo
Median Age 43
Population 14,628

Air Quality

Source: AirNow.gov · Miami

🌬️ Air Quality Index (AQI) 50 Good
☀️ O3 45 Good
🫁 PM2.5 50 Good

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Association of REALTORS®
Disclaimer: IDX listing information is presented by Rebonus Brokerage LLC for consumer informational purposes only. The information provided is 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. Data is deemed reliable but is not guaranteed by the MLS or the real estate broker. This page presents structured listing information sourced directly from the MLS via the RESO Web API feed. Rebonus prioritizes maximum field coverage and data completeness, displaying the most granular MLS-provided attributes available. Properties may be listed or sold by various participants in the MLS.