MASHTA ISLAND

660 S Mashta Dr, Key Biscayne FL 33149

7 beds · 8.5 baths · 5,043 ft²

Closed

$16,999,000

22.56%

Est. Payment $90,476/mo

MLS Sheet Video

7

Bedrooms

8.5

Bathrooms

5,043

Sq. Ft.

1965

Year Built

396

Days on Market

Description

Don't miss this opportunity to own a rarely available wide bay front home on S Mashta Dr featuring 100 ft of water frontage & unobstructed views. This large 2 story home has an eat in kitchen, 3 door wine chiller & separate walk-in pantry/storage area. An adjacent covered patio is separated from the kitchen by multi sliding impact doors that open & stack against each other expanding your entertaining space & bringing the outside in. The primary BR has 2 full baths & 3 walk-in closets. There are an additional 4 BR's & 4 baths on the first floor, one of which has a kitchenette & a separate entrance. A mosaic staircase leads to 2 additional bedrooms w/ensuite baths & a large shared balcony Additional amenities include heated pool, cabana bath & an expansive patio for entertaining.

Facts

MLS#
A11526068
Subdivision
MASHTA ISLAND
Property Type
Residential
Property Sub Type
Single Family Residence
Year Built
1965
Lot Size
15,000 ft²
Sq. Ft.
5,043 ft²
Sq. Mt.
469 m²
Price per sq. ft.
$3,371/ft²
Price per sq. mt.
$36,245/m²
Stories
Garage
Pool
Days on Market
396 days
Listed
Jan 19, 2024
Last Updated
Mar 31, 2025
Price/Lot Sq.Ft.
$1,133/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

77

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).

3/31/2025Sold$16,999,000
9/16/2024Price change$16,999,000-22.6%
1/19/2024Listed for sale$21,950,000

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

Location

660 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

$104,792/mo

Principal & Interest

$90,476

Property Tax

$14,166

Insurance

$150

HOA

$0

20% ($3,399,800)
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

Hablo Español

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