38
Map
$16,800,000
●
House -
For Sale
640 S Mashta Dr
Key Biscayne, FL 33149
4 Beds
4 Baths
3,620 Ft²
$95,462
Est. Monthly
About This Property
Welcome to your own slice of paradise! Enjoy breathtaking sunsets
from your private dock on this waterfront property boasting 100
feet of direct Biscayne Bay frontage. Ideally located on Mashta
Island. Set on a 15,000 SF lot, the home features 5 beds, 5 baths,
including 2 bayfront primary suites with stunning views, impact
windows and doors throughout. The open-concept layout flows
seamlessly from the living and dining areas to the modern kitchen
and out to the pool and entertainment patio, with floor-to-ceiling
glass doors that open to blend indoor and outdoor living. Tranquil
guest suite upstairs offering privacy and views. It also features
an oversized 2-car garage, covered parking, and a spacious driveway
for guests. Perfect to move in, renovate, or build your dream
waterfront estate
Unit Size
3,620 Ft²
Days on Market
185 days
Land Size
0.34 acres
Price per sqft
$4,641
Property Type
House
Property Taxes
$12,971
HOA Dues
-
Year Built
1968
Listed By
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Cap Rate
100% Occupancy
N/A (extreme outlier) What does this mean?
Based on our analysis, the cap rate of this property is 1.25%. A negative cap rate indicates that the property might not be feasible as an income-producing asset. The median cap rate for a near zip code 11238 is 4.23%.
How much can I actually make?
Actual monthly rental income may vary between $4,760 and $7,140 depending on unit-specific characteristics. You can change the amount using the slider to further explore.
How is cap rate calculated?
Cap Rate = Net Operating Income (NOI) / Property Asset Value.
When calculating the cap rate, we assume 100% occupancy. Leverage (mortgage) is not considered.
Cap Rate provided by RealtyHop and RentHop, learn more about cap rate here.
Last updated: 24 days ago (Miami MLS #A11990382)
Price History
| Date / Event | Date | Event | Price |
|---|---|---|---|
| Apr 2, 2026 | Listed by DLS International Realty | $16,800,000 | |
| Listed by DLS International Realty | |||
| Oct 15, 2025 | Listed | $19,500,000 | |
| Listed | |||
| | |||
|
Welcome to your own slice of paradise! Enjoy breathtaking sunsets from your private dock on this waterfront property boasting 100 feet of direct Biscayne Bay frontage. Ideally located on Mashta Island. Set on a 15,000 SF lot, the home features 5 beds, 5 baths, including 2 bayfront primary suites with stunning views, impact windows and doors throughout. The open-concept layout flows seamlessly from the living and dining areas to the modern kitchen and out to the pool and entertainment patio, with floor-to-ceiling glass doors that open to blend indoor and outdoor living. Tranquil guest suite upstairs offering privacy and views. It also features an oversized 2-car garage, covered parking, and a spacious driveway for guests. Perfect to move in, renovate, or build your dream waterfront estate.
| |||
| Oct 16, 2024 | Sold | ||
| Sold | |||
| Sep 21, 2024 | In contract | - | |
| In contract | |||
| Aug 5, 2024 | Price Decreased |
$13,250,000
↓ $2M
(11.7%) | |
| Price Decreased | |||
Show More
Property Highlights
Parking Available
Garage
Air Conditioning
With View
Parking Details
Has Garage
Attached Garage
Has Open Parking
Parking Features: Driveway, Guest
Garage Spaces: 2
Interior Details
Full Bathrooms: 4
Interior Features: Entrance Foyer, Pantry, Vaulted Ceiling(s), Walk-In Closet(s), First Floor Entry, Split Bedroom, Garage Converted
Appliances: Dishwasher
Flooring Type: Other
Exterior Details
Square Footage: 3620
Architectural Style: Other, Attached
Year Built: 1968
Waterfront Features: Ocean Access, Ocean Front
Building Name: MASHTA ISLAND
Building Area Total: 4990
Building Area Units: Square Feet
Construction Materials: Concrete
Pool Features: In Ground
Lot Features: Less Than 1/4 Acre Lot
Lot Size Area: 15000
Lot Size Units: Square Feet
Lot Size Acres: 0.344
Lot Size Square Feet: 15000
Water Source: Municipal Water
Financial Details
Tax Annual Amount: $155,651
Utilities Details
Cooling Type: Central Air
Heating Type: Other
Sewer : Public Sewer
Building Info
Data used for valuation calculations is provided by RealtyHop, and other third party sources
Comparables
Unit
Status
Status
Type
Beds
Baths
ft²
Price/ft²
Price/ft²
Asking Price
Listed On
Listed On
Closing Price
Sold On
Sold On
HOA + Taxes
About Key Biscayne
Similar Homes for Sale
Currently no similar homes aroundNearby Rentals
Listed by: Brigitte De Langeron
DLS International Realty
Last Updated: 24 days ago
Data Source: Miami MLS, MLS# A11990382
IDX information is provided exclusively for personal, non-commercial use, and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. Information is deemed reliable but not guaranteed. The listing broker’s offer of compensation is made only to participants of the MLS where the listing is filed.
DLS International Realty
Last Updated: 24 days ago
Data Source: Miami MLS, MLS# A11990382
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Phone: 425-283-2930
Address: 335 Madison Avenue, New York, NY 10017