669 S Mashta Drive, Key Biscayne, FL 33149

$5,799,000

Virtual Tour

https://www.propertypanorama.com/instaview/mia/A12033340

Property Type: Residential Bedrooms: 4 Baths: 4 Square Footage: 3,382 Status: Active

Current Price: $5,799,000 List Date: 6/05/2026 Last Modified: 6/11/2026

Overview

Description

Located on the exclusive and highly sought-after Mashta Island, this exceptional property offers a rare opportunity to build your dream home or enjoy the existing beautifully refurbished residence. The home features new bathrooms, updated flooring, and tasteful modern finishes throughout. Designed for relaxed Florida living, the spacious covered terrace overlooks a stunning mosaic-tiled pool, creating the perfect setting for entertaining or enjoying the tropical surroundings. A unique opportunity in one of Key Biscayne's most desirable neighborhoods. Easy to show.

Listing Details MLS# A12033340

General Property Information

Property Sub Type: Single Family Residence
Bedrooms Total: 4
Bathrooms Total: 4
Bathrooms Full: 3
Bathrooms Half: Yes
Building Area Main: 3382
Living Area Main: 3382
Adjusted Area Main: 3382
Year Built: 1960
Lot Size Area: 10000
Lot Size Acres: 0.23
Senior Community YN: No
Outdoor Living Spaces YN: Yes
Stories Total: 2
Direction Faces: West
Pool Private YN: Yes

Property Features

Dining Area: Breakfast Area; Formal Dining Electric: Circuit Breakers Exterior Features: Outdoor Shower Flooring: Vinyl Parking Features: Driveway Appliances: Dishwasher; Disposal; Dryer; Gas Range; Oven; Refrigerator; Washer Construction Materials: CBS Cooling: Central Air Heating: Heat Strip Interior Features: Bedroom Layout - Split; High Ceilings; Roman Tub Levels: Two Listing Terms: Cash; Conventional Pets Allowed YN: Yes Pool Features: Above Ground Possession: Negotiable Restrictions: No Restrictions Road Frontage Type: Public Road Roof: Tar/Gravel Security Features: Smoke Detector(s) Sewer: Public Sewer Special Information: Sold As-Is Sprinkler Description: Auto Sprinkler View: Garden Water Source: Public Window Features: Blinds Showing Requirements: Call Listing Agent; Showing Service Outdoor Living Spaces: Patio Room Types: Florida Room

Contract Information

Comp Sale YN: No
Original List Price: 5799000
Occupant Type: Call Listing Agent

Location and Legal

Country: United States
County Or Parish: Miami-Dade
County Parish Name: Miami-Dade
Street Number: 669
Street Direction Prefix: S
Street Name: Mashta
Street Suffix: Drive
City Name: Key Biscayne
Municipal Code: 24
State Or Province: FL
Postal Code: 33149
Postal Code +4: 1747
Postal Zip: 33149
Subdivision Name: MASHTA ISLAND
Area: 2520
Elementary School: Key Biscayne K-8
Middle Or Junior School: Ponce De Leon
High School: Coral Gables
Special Assessment YN: No
Parcel Number: 2452050080180
Subdivision Number: 8
Zoning: 2001
Flood Zone: AE

Financial Information

Association YN: Yes
Association Membership: Voluntary
Membership Fee Required YN: No
Tax Annual Amount: 22013
Tax Year: 2025
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

Status Change Information

Major Change Timestamp: 2026-06-05T04:00:00Z
Major Change Type: New Listing
Status Change Date: 2026-06-08

More Information

Pool Size Details

Pool Size (WxL): 0x0

Storm Protection

Accordian Shutters: Partial
Impact Glass: Partial

Price Calculations

Current Price To SqFt: 1714.66

Section Details

Parcel Number MLX: 0180

Originating Details

Originating System Key: 509718286
Originating System ID: M00000151

Office/Member Information

DXORIGMLSID: SEF

Dining Area

Breakfast Area: Yes
Formal Dining: Yes

Electric

Circuit Breakers: Yes

Exterior Features

Outdoor Shower: Yes

Flooring

Vinyl: Yes

Parking Features

Driveway: Yes

Possession

Negotiable: Yes

Sewer

Public Sewer: Yes

Special Information

Sold As-Is: Yes

View

Garden: Yes

Heating

Heat Strip: Yes

Sprinkler Description

Auto Sprinkler: Yes

Window Features

Blinds: Yes

Appliances

Dishwasher: Yes
Disposal: Yes
Dryer: Yes
Gas Range: Yes
Oven: Yes
Refrigerator: Yes
Washer: Yes

Construction Materials

CBS: Yes

Interior Features

Bedroom Layout - Split: Yes
High Ceilings: Yes
Roman Tub: Yes

Levels

Two: Yes

Listing Terms

Cash: Yes
Conventional: Yes

Pool Features

Above Ground: Yes

Road Frontage Type

Public Road: Yes

Roof

Tar/Gravel: Yes

Security Features

Smoke Detector(s): Yes

Water Source

Public: Yes

Cooling

Central Air: Yes

Showing Requirements

Call Listing Agent: Yes
Showing Service: Yes

Master Bedroom/Bath

Dual Sinks: Yes
Master Bdrm - Ground: Yes
Separate Shower: Yes
Separate Tub: Yes

Pets Allowed YN

Yes: Yes

Restrictions

No Restrictions: Yes

Outdoor Living Spaces

Patio: Yes

Room Types

Florida Room: Yes

Room Information

Room Name
Florida Room

Listing Office: Coldwell Banker Realty

Last Updated: June - 11 - 2026

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669 S Mashta Drive, Key Biscayne, FL 33149 (MLS# A12033340)