669 S Mashta Dr Key Biscayne, FL $ 4,950,000
669 S Mashta Dr
$ 4,950,000
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669 S Mashta Dr

Key Biscayne, FL, 33149
$ 4,950,000
Bedrooms3 Baths3.1 Sq 3,382

Monthly Estimate*

$ 30,882

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Single Family Home for sale in Key Biscayne, FL

for $4,950,000 with 3 bedrooms and 3 full baths, 1 half bath. This 3,382 square foot home was built in 1960.

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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Single Family Active

Price

$ 4,950,000

Bedrooms

3

Full Bath

3

Half Bath

1

Property Type

Single Family

Taxes

$ 22,036

Style

Year Built

1960

Town/City

Key Biscayne

County/Region

Miami-Dade

MLS | Web ID

A11922444

Features
General
Sewer Public Sewer
Heating Central
Cooling Central Air Electric
Utilities Cable Available
Possession Closing & Funding Close Of Escrow
Roof Other
Appliances Dryer Dishwasher Electric Water Heater Disposal Gas Range Microwave Refrigerator Washer
HOA Fee 0
Garage Spaces 0
Patio/Porch Features Patio
Architectural Style Detached Two Story
Pool Features In Ground Pool
Restrictions OK To Lease
Construction Materials Block
Pets Allowed Size Limit Yes
Year Built 1960
View Garden
Stories Count 2
Levels Two
Property Subtype Single Family Residence
Tax Year 2025
Ownership Limited Partnership
Community Features Other
Assoc Fee Paid Per Monthly
County Miami-Dade
Property Type Residential
Subdivision Name MASHTA ISLAND
Facing Direction West
Garage Y/N false
Total Rooms 0
Full Baths 3
Special Listing Conditions Listed As-Is
Status Active
Directions Take Crandon Blvd south and turn right onto Harbor Drive. Follow Harbor Drive all the way to the end where it becomes South Mashta Drive. Continue straight; the home will be on the left-hand side.
High School Coral Gables
City Key Biscayne
Senior Community Y/N false
Zoning Description 2001
MLS Area 52
Lot Size Units Square Feet
Lot Size Square Feet 10000
Carport Spaces 0
Carport Y/N false
Listing Terms Cash Conventional
Elementary School Keybiscayne
Year Built Details Resale
Tax Annual Amount 22036
Middle/Junior High School Ponce De Leon
Lease Considered Y/N false
Virtual Tour https://www.dropbox.com/scl/fi/9kr0ez4j8alwcxnzuxqlf/669_s_mashta_dr_slideshows_-5.mp4?rlkey=yi8dsiv5x8ed46meeltrmrqhv&dl=0
Standard Status Active
Occupancy Type Vacant
Property Sub Type Additional Single Family Residence
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
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Interior
Interior Amenities Dining Area Separate/Formal Dining Room First Floor Entry Separate Shower Upper Level Primary
Flooring Hardwood Marble Wood
Furnished Y/N Unfurnished
Air Conditioning Y/N true
Heating Y/N true
Half Baths 1
Total Bedrooms 3
Total Baths 4
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Exterior
Exterior Amenities Security/High Impact Doors Lighting Outdoor Shower Patio Storm/Security Shutters
Parking Features Driveway
Lot Features 1/4 to 1/2 Acre Lot
Water Source Public
Lot Size Area 10000
Building Area Total 3382
Waterfront Y/N false
Covered Spaces 0
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* Excluded Features
List By
One Sotheby's International Realty

Broker

one.miriam@icloud.com

Email

Affordability Calculator

$32,718
Per Month
94%
6%
0%
Monthly Principal & Interest
$30,882
Monthly Property Taxes
$1,836
Monthly Home Insurance
--
Default based on a 30-year fixed rate of 6.375% with 20% down. The estimated payment is offered for convenience and is not an offer of credit. Due to market fluctuations, interest rates are subject to change at any time and without notice. Your individual rate may vary. Rates may differ for FHA, VA or jumbo loans.
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Nearby
3062566 Elementary School
4268812 Middle School
Coral Gables High School High School
Pricing History
DatePricePrice ChangeDescription
12/1/2025$4,950,000 Listed Price

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669 S Mashta Dr, Key Biscayne, FL, 33149 is a Single Family Home for sale at $4,950,000 with 3,382 sqft. 669 S Mashta Dr has 3 bedrooms, 3.1 baths, and was built in 1960. The property's zip code is 33149 which is in Key Biscayne, FL