Skip to property details
📷 1 / 28
Key Biscayne For Sale SINGLE FAMILY RESIDENCE

669 S Mashta Dr, Key Biscayne FL 33149

669 S Mashta Dr, Key Biscayne FL 33149

$5,799,000 ≈ ₿87.4634

MLS A12033340 · 46 days on market

4

Beds

3.5

Baths

3,382

SQUARE FEET

Single Family Residence

Type

1960

Built

Listing courtesy of

Coldwell Banker Realty

Maureen Jauregui

MLS® #A12033340

Listing information last updated June 11, 2026

MiamiCityRealty.com is an agent's best friend. We proudly co-broke and partner with Coldwell Banker Realty — and every agent and broker in Miami — to get the deal done.

Overview

This single family residence in Key Biscayne has 4 bedrooms and 3.5 bathrooms across 3,382 square feet, and is listed for sale at $5,799,000 (about $1,715 per square foot). Built in 1960.

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 history

Listed for sale

Jun 5, 2026 · MIAMI MLS

$5,799,000

Days on market

as of today

46 days

Building & financials

FROM MIAMI MLS

The carrying-cost and structural facts that close or kill a Miami deal — straight from the listing feed.

Annual property tax (2025)

$22,013

Association type

None

Pets

Allowed (verify restrictions)

Dues, taxes, and association data per MIAMI MLS and public records; flood zone from FEMA NFHL. Verify with the HOA, county, and your insurer during due diligence.

Property details

MLS #A12033340
Price$5,799,000
Size3,382 Square Feet
Bedrooms4
Bathrooms3.5
Year built1960
TypeSingle Family Residence
StatusFor Sale
Price / Square Feet$1,715

Features & amenities

Dishwasher
Disposal
Dryer
Florida Room
Gas Range
Has a View
Has Cooling System
Has Heating System
Open Parking
Outdoor Shower
Refrigerator
Roman Tub
Self Cleaning Oven
Split Bedroom
Volume Ceilings
Wall Oven
Washer

Location

669 S Mashta Dr, Key Biscayne FL 33149

Estimate your payment

$

Est. monthly payment

per month

Principal & interest
Property tax (est.)
Down (20%)
Ask about real rates →

Estimate only — not a Loan Estimate, pre-approval, or commitment. Taxes, insurance & HOA vary. Confirm with a licensed lender.

Questions, answered

How many bedrooms does this property have?

This Key Biscayne single family residence has 4 bedrooms.

How many bathrooms does this property have?

This Key Biscayne single family residence has 3.5 bathrooms.

What is the square footage?

This Key Biscayne single family residence offers 3,382 square feet of living space.

When was this property built?

This Key Biscayne single family residence was built in 1960.

What are the annual property taxes?

Annual property taxes for this Key Biscayne single family residence are approximately $22,013, per the latest tax record.

How long has this property been on the market?

This Key Biscayne single family residence has been on the market for 6 days.

Ask about this home

Questions on price, building, or financing? Send a note — we reply fast.

Book a private showing

Schedule a tour of 669 S Mashta Dr, Key Biscayne FL 33149

Schedule a Tour

Tour Type

By submitting you agree to be contacted about this property. MCR agents are REALTORS® · Equal Housing Opportunity. We never advertise a "free" buyer's agent — we'll explain compensation up front.

$5,799,000

669 S Mashta Dr, Key Biscayne FL 33149

Key Biscayne · 4 bd · 3.5 ba · 3,382 Square Feet

Share this home

Text it, email it, post it — a branded card travels with every link.

Message Email WhatsApp Facebook X LinkedIn

More like this

Other homes near Key Biscayne

Thinking of selling?

Own a home in Key Biscayne?

Get a no-obligation MCR estimate and see how your block has trended this year.

What's my home worth →

Own a rental?

List, screen, and lease with MCR.

Applicant screening, leases, and rent collection — managed end to end by a Miami brokerage.

List your rental →

Listing data © MIAMI MLS · IDX information deemed reliable but not guaranteed · 46 days on market.

We do not advertise a “free” buyer’s agent; buyer-representation compensation is disclosed in writing. Bitcoin pricing is indicative and updates with the market — not financial, tax, or legal advice. Buyer to independently verify all measurements, assessments, and flood & insurance facts.

$5,799,000

4 bd · 3.5 ba · 3,382 Square Feet

Tour →

Compare listings

Compare

Sign In

Register

Reset Password

Please enter your username or email address, you will receive a link to create a new password via email.