MASHTA ISLAND A REPLAT OF
500 S Mashta Dr, Key Biscayne FL 33149
6 beds · 6.5 baths · 10,820 ft²
6
Bedrooms
6.5
Bathrooms
10,820
Sq. Ft.
2014
Year Built
4
Garage
378
Days on Market
Description
Enjoy ocean and sunset views from this 2014 Mashta Island estate on a 23,814 SqFt oversized lot with 138ft of water frontage. This custom-built home, inspired by Modern architect Richard Meier, features pure geometric lines and integrated open spaces with an emphasis on natural light. Unique features include a 3-story curved glass curtain wall, 14 skylights over a 27-ft high atrium, NanaWall folding glass doors, elevator, gym, dock, staff quarters, 4-car garage, generator and smart home technology.
Facts
- MLS#
- A10811961
- Subdivision
- MASHTA ISLAND A REPLAT OF
- Property Type
- Residential
- Property Sub Type
- Single Family Residence
- Year Built
- 2014
- Lot Size
- 23,814 ft²
- Sq. Ft.
- 10,820 ft²
- Sq. Mt.
- 1,005 m²
- Price per sq. ft.
- $1,784/ft²
- Price per sq. mt.
- $19,204/m²
- Stories
- —
- Garage
- 4 spaces
- Pool
- —
- Days on Market
- 378 days
- Listed
- Feb 4, 2020
- Last Updated
- May 27, 2021
- Price/Lot Sq.Ft.
- $810/ft²
Comparable homes
Same ZIP, similar price + bedrooms.
$19,950,000
6 bd · 7 ba · 6,208 sqft
120 Knollwood Dr, Key Biscayne FL 33149
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510 S Mashta Dr, Key Biscayne FL 33149
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445 Grand Bay Drive # 1A, Key Biscayne FL 33149
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220 Harbor Dr, Key Biscayne FL 33149
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Market insights for Key Biscayne
Live MLS-derived activity. Forecast is a conservative rule-of-thumb estimate — not a guarantee.
Sellers market
May 2026
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).
| 5/27/2021 | Sold | $19,300,000 |
| 2/22/2021 | Price change | $19,300,000+6.0% |
| 2/4/2020 | Listed for sale | $18,200,000 |
History reflects fields present on the live MLS record. Full multi-year history requires the MIAMI ListingHistory resource (not yet enabled).
Location
GreatSchools Summary Ratings
Public + private K-12 schools within 5 miles of this listing.
New Generation Christian AcademyKG,1,2,3,4,5,6,7,8,9,10,11,12 · private · 0.7 mi
- Flex Learning Academy
2,3,4,5,6,7,8,9,10,11,12 · private · 1.3 mi
- Lindamood-Bell Learning Processes Weston
6 · private · 1.6 mi
- Weston Christian Academy
PK,KG,1,2,3,4,5,6,7,8 · private · 1.6 mi
- Three Village Montessori
KG,1,2,3 · private · 1.6 mi
- South Florida Learners
6,7,8,9,10,11,12 · private · 1.8 mi
- Country Isles Elementary School
PK,KG,1,2,3,4,5 · public · 2.0 mi
- St Bonaventure Catholic School
PK,KG,1,2,3,4,5,6,7,8 · private · 2.0 mi
- The Sagemont School, Lower School Campus
PK,TK,KG,1,2,3,4,5,6,7,8,9,10,11,12 · private · 2.1 mi
- Western High School
9,10,11,12 · public · 2.1 mi
Data provided by GreatSchools.org © 2026. All rights reserved.Estimated Monthly Payment
$118,956/mo
Principal & Interest
$102,723
Property Tax
$16,083
Insurance
$150
HOA
$0
Estimates only. Actual payment depends on credit, lender, insurance carrier, and FL/Miami-Dade specifics. Contact Rangely for a precise quote.
The data relating to real estate for sale on this website comes in part from the Southeast Florida Multiple Listing Service. MLS Data is deemed reliable, but is not guaranteed accurate by MIAMI REALTORS®.
Accuracy of listing information is not guaranteed. Listing information is provided for personal consumer, non-commercial use, solely to identify potential properties for potential purchase. All other use is strictly prohibited and may be a violation of federal and state law.
Copyright Southeast Florida MLS a/k/a SEFMLS © 2026.
Updated within 24 hours
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