For Sale
640 South Mashta Drive, Key Biscayne
5
5
$16,800,000
640 South Mashta Drive, Key Biscayne, FL 33149 Property Information
640 South Mashta Drive, Key Biscayne, FL 33149 Property Information
- General
- Owner
- Documents
- Tax
- Neighborhood
Address
| Primary address | 640 South Mashta Drive, Key Biscayne |
| Zip code | 33149 |
| County | Miami-Dade |
| Municipality | Key Biscayne |
| Parcel ID | 2452050080320 |
Sales & Tax Overview for 640 South Mashta Drive, Key Biscayne
View detailed information on past sales, title documents and property taxes, including the assessed market value, in their dedicated tabs.
| Sale date | 10/18/2024 |
| Sale price | $12,375,000 |
| Arm's length | Register |
| Property tax | $153,719 |
Lot & Building Information for 640 South Mashta Drive, Key Biscayne
| Building sqft | 4,990 |
| Building class | Residential - Single Family: 1 Unit (0101) |
| Acreage | 0.344 |
| Year built | 1968 |
| Stories | 2 |
| Units | 1 |
| Bedrooms | 4 |
| Bathrooms | 4 |
Zoning, Use & Area Overview
Walk Score
Transit Score
Bike Score
| Zoning district | Register |
| School district | Miami-Dade County Public Schools |
View more neighborhood information such as transportation, nearby schools and risk designations in the dedicated tab.
Other Property Data for 640 South Mashta Drive, Key Biscayne
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About 640 South Mashta Drive, Key Biscayne
What is the year built & the total sq. ft. for 640 South Mashta Drive, Key Biscayne, FL 33149?
640 South Mashta Drive, Key Biscayne, FL 33149 was built in 1968 and has a total of 4,990 square feet.
What is the assessed value of 640 South Mashta Drive, Key Biscayne, FL 33149 and the property tax paid?Assessed at $9,910,420, the tax amount paid for 640 South Mashta Drive, Key Biscayne, FL 33149 is $153,718.
When was 640 South Mashta Drive, Key Biscayne, FL 33149 last sold and what was the last sale price?640 South Mashta Drive, Key Biscayne, FL 33149 was last sold in 10/18/2024 for $12,375,000.
Ownership Information
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Homes for Sale in 640 South Mashta Drive, Key Biscayne
$16,800,000
| Listing date | 06/03/2026 |
|---|---|
| Bedrooms | 5 |
| Bathrooms | 5 |
It's Difficult to describe the unique water view view from the moment you step into the house ! visit as soon as you can to experiment such feeling . This home embodies all the charm and elegance of Old Miami .while being incredible Elegant comfortable and livable. Floor-to-ceiling sliding glass doors overlooking pool, can be wide open , integrating the pool area with the house . This home saw unique cocktail parties and its ready for many more. Wonderful beach house style. Bathrooms and kitchen are updat... Contact agent for more details.
Listed by:
Brigitte de Langeron
Email Agent
Listing Price History
| Date | Price |
|---|---|
| 06/03/2026 | $16,800,000 |
| 04/18/2026 | $16,900,000 |
Active Listings For This Property:
Real Estate Reports:
Eliza Theiss,
Jun 04, 2026
World Cup or Your Mortgage/Rent? Ticket Prices Rival Host City Housing Costs
World Cup ticket prices rival monthly housing expenses in the 11 U.S. host cities, with even the cheapest seats covering weeks or even months of rent or mortgage payments.
Lucian Alixandrescu,
May 27, 2026
NYC Office Market Ahead of National Curve: Manhattan Q1 Vacancy Drops to 13.1%
New York City’s office market outpaced the U.S. on several major metrics in Q1, with Manhattan vacancy nearly 5 percentage points below the national benchmark, asking rents climbing against a downward national trend and flex inventory crossing 15 million square feet.
Laura Pop-Badiu,
May 21, 2026
How to Find Land Boundaries: Free & Paid Methods
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Past Sales & Property History for 640 South Mashta Drive, Key Biscayne
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*Here are the three most recent sales for this property.
More about Miami-Dade County Property Records
Title Documents for 640 South Mashta Drive, Key Biscayne
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R: Recorded date
D: Document date
Property Taxes for 640 South Mashta Drive, Key Biscayne
Access detailed property tax data for 640 South Mashta Drive, Key Biscayne, FL 33149. Tax information included: property tax, market value and assessed value, exemptions, abatements, and assessment history.
| Tax year: | 2025 |
| Property tax | $153,719 |
| Market value | $9,910,420 |
| Assessed value | $9,910,420 |
More about Miami-Dade County Property Taxes
Assessment History for 640 South Mashta Drive, Key Biscayne
Here's the assessment & property tax history for 640 South Mashta Drive, Key Biscayne, including the evolution of the total tax rate and corresponding property tax.
| Year | Market value | Assessment value | Total tax rate | Property tax | Year over year change |
|---|---|---|---|---|---|
| 2025 | $9,910,420 | $9,910,420 | 15.5108 | $153,719 | +43.62% |
| 2024 | $9,165,286 | $5,157,166 | 15.6226 | $107,030 | +4.79% |
| 2023 | $8,390,152 | $5,006,958 | 15.8731 | $102,140 | +6.17% |
| 2022 | $7,738,634 | $4,861,125 | 15.8911 | $96,209 | +5.17% |
| 2021 | $6,690,177 | $4,719,539 | 16.4556 | $91,475 | -14.36% |
Risk
Create a free account to unlock extended information for 640 South Mashta Drive, Key Biscayne, including whether it's located in FEMA flood zones, floodways or special flood hazard areas, as well as the Coastal barriers resources system area (COBRA).
| FEMA flood zone(s) | AE (See more on map) |
Transportation
Access the detailed traffic volume map for 640 South Mashta Drive, Key Biscayne to see estimated average daily traffic on streets surrounding the property as well as the types of properties in its vicinity.
| View daily traffic map |
Schools
Nearest elementary schools
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Key Biscayne K-8 Center | 8 | Public | PK, K-8 | 921 | 0.63 |
| Key Biscayne K-8 Center | 8 | Public | PK, K-8 | 921 | 0.63 |
| Key Biscayne Presbyterian School | NR | Private | PK-1 | 160 | 1.13 |
| Key Biscayne Presbyterian School | NR | Private | PK-1 | 160 | 1.13 |
| St Christophers Montessori | NR | Private | PK-5 | 103 | 1.19 |
Nearest middle schools
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Key Biscayne K-8 Center | 8 | Public | PK, K-8 | 921 | 0.63 |
| St Agnes Academy | NR | Private | PK-8 | 498 | 1.22 |
| Mast Academy | 10 | Public | 6-12 | 1,535 | 3.79 |
| Amikids Miami-Dade South | NR | Public | 6-12 | 14 | 3.88 |
| Ransom Everglades School | NR | Private | 6-8 | 0 | 4.87 |
Nearest high schools
| Name | Rating | Type | Grade range | No of students | Distance to school (mi) |
|---|---|---|---|---|---|
| Mast Academy | 10 | Public | 6-12 | 1,535 | 3.79 |
| Amikids Miami-Dade South | NR | Public | 6-12 | 14 | 3.88 |
| Immaculata-La Salle High School | NR | Private | 9-12 | 869 | 4.70 |
| Immaculata-La Salle High School | NR | Private | 9-12 | 0 | 4.71 |
| Ransom Everglades School | NR | Private | 6-12 | 1,084 | 5.02 |
Data provided by GreatSchools.org © 2025. All rights reserved.
Neighbors for 640 South Mashta Drive, Key Biscayne
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