MASHTA ISLAND

669 S Mashta Dr, Key Biscayne FL 33149

3 beds · 3.5 baths · 3,382 ft²

Closed

$4,950,000

Est. Payment $26,346/mo

MLS Sheet Video

3

Bedrooms

3.5

Bathrooms

3,382

Sq. Ft.

1960

Year Built

38

Days on Market

Description

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.

Facts

MLS#
A11922444
Subdivision
MASHTA ISLAND
Property Type
Residential
Property Sub Type
Single Family Residence
Year Built
1960
Lot Size
10,000 ft²
Sq. Ft.
3,382 ft²
Sq. Mt.
314 m²
Price per sq. ft.
$1,464/ft²
Price per sq. mt.
$15,764/m²
Stories
Garage
Pool
Days on Market
38 days
Listed
Nov 30, 2025
Last Updated
Feb 14, 2026
Price/Lot Sq.Ft.
$495/ft²

Comparable homes

Same ZIP, similar price + bedrooms.

Market insights for Key Biscayne

Live MLS-derived activity. Forecast is a conservative rule-of-thumb estimate — not a guarantee.

Sellers market

May 2026

100/100
Buyers marketSellers market

34

Median days to sold

+4.5%

1-year price forecast (est.)

Price & tax history

From the live MIAMI MLS feed. Older history requires the ListingHistory resource (not yet enabled).

2/14/2026Sold$4,950,000
11/30/2025Listed for sale$4,950,000

History reflects fields present on the live MLS record. Full multi-year history requires the MIAMI ListingHistory resource (not yet enabled).

Location

669 S Mashta Dr, Key Biscayne FL 33149Directions

GreatSchools Summary Ratings

Public + private K-12 schools within 5 miles of this listing.

GreatSchoolsData provided by GreatSchools.org © 2026. All rights reserved.

Estimated Monthly Payment

$30,621/mo

Principal & Interest

$26,346

Property Tax

$4,125

Insurance

$150

HOA

$0

20% ($990,000)
7.00%
30 years
1.00% (FL avg ~1.0%)
$0/mo
$150/mo

Estimates only. Actual payment depends on credit, lender, insurance carrier, and FL/Miami-Dade specifics. Contact Rangely for a precise quote.

Rangely Adames

Rangely Adames

Sales Associate | Sunland Group

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