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Key Biscayne For Sale SINGLE FAMILY RESIDENCE PRICE REDUCED

591 N Mashta Dr, Key Biscayne FL 33149

591 N Mashta Dr, Key Biscayne FL 33149

$15,500,000 ≈ ₿233.47

MLS A11924175 · 237 days on market

4

Beds

4.5

Baths

4,290

SQUARE FEET

Single Family Residence

Type

1960

Built

Listing courtesy of

EXP Realty LLC

Cristina D Anglemont De Tassigny

MLS® #A11924175

Listing information last updated March 20, 2026

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

Overview

This single family residence in Key Biscayne has 4 bedrooms and 4.5 bathrooms across 4,290 square feet, and is listed for sale at $15,500,000 (about $3,613 per square foot). Built in 1960.

BEAUTIFUL AND UNIQUE WATERFRONT HOME ON EXCLUSIVE MASHTA ISLAND, ON DESIRABLE NORTH MASHTA DR IN KEY BISCAYNE. ELEVATED AND VERY COMFORTABLE 4BR/4.5BA + MAID’S QUARTERS WITH APPROX. 4,290 SQ FT UNDER A/C, SITTING ON A LARGE AND PRIVATE 15,184 SQ FT LOT, IDEAL FOR ENJOYING WITH FAMILY AND FRIENDS.

APPROX. 50 FT DOCK WHERE THE OWNERS HAVE DOCKED BOATS OF AROUND 78 FT, WITH DEEP WATER OF ABOUT 8 FT EVEN AT LOW TIDE – A RARE TRUE DEEP-WATER ACCESS ON THE ISLAND. NORTH-FACING CANAL KEEPS THE HOUSE AND OUTDOOR AREAS PLEASANT AND COOLER ALL YEAR ROUND. EASY TO SHOW. BRING YOUR QUALIFIED BUYERS AND BEST OFFERS.

Listing history

Price reduced

↓ $1,450,000 from $16,950,000 · Mar 20, 2026 · MIAMI MLS

$15,500,000

Listed for sale

Nov 26, 2025 · MIAMI MLS

$16,950,000

Days on market

as of today

237 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)

$112,793

Association type

None

Waterfront

Ocean Access, Canal Front

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 #A11924175
Price$15,500,000
Size4,290 Square Feet
Bedrooms4
Bathrooms4.5
Garage2
Year built1960
TypeSingle Family Residence
StatusFor Sale
Price / Square Feet$3,613

Features & amenities

Dishwasher
Disposal
Dryer
Electric Water Heater
First Floor Entry
Gas Range
Has a View
Has Cooling System
Has Garage
Has Heating System
Has Waterfront
Microwave
No Additional Rooms
Trash Compactor

Location

591 N Mashta Dr, Key Biscayne FL 33149

Estimate your payment

$

Est. monthly payment

per month

Principal & interest
Property tax (est.)
Down (20%)
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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 4.5 bathrooms.

What is the square footage?

This Key Biscayne single family residence offers 4,290 square feet of living space.

When was this property built?

This Key Biscayne single family residence was built in 1960.

How many parking spaces are included?

This Key Biscayne single family residence includes 2 parking spaces.

What is the view from this property?

The view from this Key Biscayne single family residence is Canal, Water.

What are the annual property taxes?

Annual property taxes for this Key Biscayne single family residence are approximately $112,793, 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 72 days.

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$15,500,000

591 N Mashta Dr, Key Biscayne FL 33149

Key Biscayne · 4 bd · 4.5 ba · 4,290 Square Feet

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Listing data © MIAMI MLS · IDX information deemed reliable but not guaranteed · 237 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.

$15,500,000

4 bd · 4.5 ba · 4,290 Square Feet

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