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View/Area
Exterior
Living
Other
Dining
Kitchen
Entry Way
Bedroom
Bath
Floorplan

551 S Mashta Dr, Key Biscayne, FL 33149

$6,160,000

Last sold 06/09/2025 for $4.7M

6
bed
5
bath
3,245
Sqft ($1,448/Sqft)

House not for sale

About 551 S Mashta Dr

Property type House

Neighborhood

Year built 1961

HOA fee $0/month

Lot size 10,000 Sqft

Movoto estimate

Parking 2 garage spaces

Property description

Your tropical private retreat on exclusive Mashta Island. This 6 bed / 5 bath, 3,245 SF Mediterranean villa sits on a spacious 10,000 SF lot with lush landscaping, a resort-style pool, and a private cabana guest suite. Interiors with soaring 10-foot ceilings flow seamlessly to the outdoors, perfect for entertaining and relaxed island living. Intentionally designed with two primary suites (first floor and second floor) enhancing comfort and privacy. The chef’s kitchen features a gas stove, cooking island, and SubZero refrigerator. Enjoy private balconies, a circular driveway, an attached 2-car garage with laundry, covered porches, and generous storage. Key Biscayne offers the ultimate family lifestyle with world-class amenities and a true sense of community.

Listed by

Listing Agent - Joan Bruggink

Listing Office - One Sotheby's International Re

Source: SEFMLS

MLS#A11776724 • last updated 1 month ago

Movoto checked SEFMLS for data 24 minutes ago

Overview
Cooling/AC	Central Air
Heating	Central
Levels/Style	Two, 2
Type	Residential
SubType	Single Family Residence
Status	Closed
Virtual Tour	N/A
MLS #	A11776724
SqFt	3245
Lot Size (SqFt)	10000
Property Tax	50906
Year Built	1961

Interior
# Full Baths	5
Total # of Baths	5
Total # of Bedrooms	6
Laundry	In Garage
Flooring	Marble

Exterior
Roof	Barrel
Exterior	Block
Other Structures	Guest House
# Garage Spaces	2
# Covered Spaces	2
Lot Desc	< 1/4 Acre

Amenities / Utilities
Utilities	Cable Available
Sewer/ Septic	Public Sewer
Water Source	Public
Pets Allowed	1

Location
View	Garden
Subdivision	MASHTA ISLAND A REPLAT OF
Area/ Subdivision	52
APN	24-52-05-009-0350
Zoning	2001

Lot/ Land Details

$6.16M

Range: $5.29M-$7.02M

Last 30 days

Lower your payment with the loan terms that fit you.

Jul 2025
Public Records
Jul 17, 2025 Sold
$4,700,000
Jul 2025
MLS # A11776724
Jul 10, 2025 Sold
$4,700,000 (-14.5%)
Jun 9, 2025 Active
—
Apr 15, 2025 Listed
$5,495,000 (+89.5%)
Aug 2019
Public Records
Aug 13, 2019 Sold
$2,900,000 (-1.3%)
Feb 2017
MLS # A10035933
Feb 2, 2017 Sold
$2,937,500
Aug 23, 2016 Price Change
$3,195,000 (-8.6%)
Feb 22, 2016 Price Change
$3,495,000 (-6.8%)
Feb 22, 2016 Listed
—
Jan 2017
Public Records
Jan 12, 2017 Sold
$2,937,500 (-8.1%)
Dec 2015
MLS # A10003267
Dec 14, 2015 Price Change
$3,750,000
Dec 14, 2015 Listed
—

Year Property taxes Tax assessment
2025
$54,871 +7.8%

$3,773,709 +6.85%
2024
$50,907 +3.2%

$3,531,817
2023
$49,328 +19.3%

$3,531,817 +29.09%
2022
$41,335 +12.5%

$2,735,880 +26.05%
2021
$36,734 +2.4%

$2,170,395
2020
$35,876 +3.7%

$2,170,395 +2.06%
2019
$34,591 -2.4%

$2,126,609 -5.53%
2018
$35,430 -2.9%

$2,251,136 -0.28%
2017
$36,480 -2.5%

$2,257,502 -0.16%
2016
$37,428 +6.0%

$2,261,094
2015
$35,311

—

551 S Mashta Dr
$4.7M
Village of Key Biscayne
$1.9M -15% y/y
33149
$1.89M -16% y/y
Key Biscayne
$1.89M -15% y/y

No chart available

Statistics calculated by Movoto

	Est. value	Bed/bath	Sqft	mi
561 S Mashta Dr, Key Biscayne, FL 33149	$6,386,000	5/4	3,749	0.02
550 N Mashta Dr, Key Biscayne, FL 33149	$6,615,000	4/4	3,960	0.02
541 S Mashta Dr, Key Biscayne, FL 33149	$7,444,000	5/6	4,757	0.02
560 N Mashta Dr, Key Biscayne, FL 33149	$6,015,000	4/3	2,743	0.03
540 N Mashta Dr, Key Biscayne, FL 33149	$5,645,000	4/5	2,904	0.03
548 S Mashta Dr, Key Biscayne, FL 33149	$10,861,000	4/5	8,943	0.03
531 S Mashta Dr, Key Biscayne, FL 33149	$9,109,000	4/4	4,410	0.04
571 S Mashta Dr, Key Biscayne, FL 33149	$5,675,000	6/4	2,761	0.04

Estimated values are based on public record data and automated valuation models. Values are not guaranteed and may not reflect current market conditions.