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510 S Mashta Dr, Key Biscayne FL 33149

House Recently Sold
$18,921,250

BTC: 295.64453125

ETH: 10,836.91294387

Sold on: 2025-07-08
32 days
Waterfront
5 bds
6 ba
5,226 sqft

Overview

Waterfront. Located on Mashta Island and island within an island in Key Biscayne. The minute you walk into the house the most breathtaking Biscayne Bay views welcomes you. Breathtaking sunsets.Oversized Lot:18,300-sq.ft. 2 story home with excellent floor plan,Large living room area w/double height ceilings, family room adjacent to Kitchen area. Large dining area w/direct water views & access to pool area. 2nd floor: Master suite & 3 additional bedrooms en suite Master suite w/balcony & large walk in closet .1st floor Guest suite.Water views from every room, dining & reception area.Gazebo by the water.Open kitchen. staff area.powder room.oversized pool w/Cabana room &cabana bath.Double access ( service access &main access) Lush garden offers total privacy . Enclosed two car garage.

Location

Details

Type:
Residential
Parking:
Additional Spaces Available / Circular Driveway / Driveway
Year Built:
1981
Lot:
18300 Square Feet
Heating:
Central / Electric
Price/sqft:
$3,636
Cooling:
Central Air / Electric
HOA:
No Data

Valuation

Our model vs. what's actually selling nearby.
Estimate
$2,950,000
$1.7M – $14.6M
Confidence Low
List vs. estimate
$16.1M above estimate
List $19,000,000 · +544.1%
Our model says this listing is priced above recent comparable activity. Room to negotiate.
Price per sq ft
$3,635
+88.8% vs. city median $1,925
Based on
5 MLS comparables
+ 18 public-records sales within 0.5 mi
Median actual sale: $3.5M
Median of recent comparable listings. Sold comps use closing price, active listings use list price.

Highlights

Annual tax
$172,413
2024
Pool
In Ground
View
Bay, Garden
Waterfront
Ocean Access, Ocean Front
Garage
2 car garage
Pets
Restrictions Or Possible Restrictions
All facts and features
  • Flooring

    • Marble

    • Wood

    Heating

    • Central

    • Electric

    Cooling

    • Central Air

    • Electric

    Appliances

    • Dishwasher

    • Refrigerator

    Other interior features

    • First Floor Entry

    • Built-in Features

    • Closet Cabinetry

    • Split Bedroom

    • Volume Ceilings

    • Den/Library/Office

    • Family Room

    • Separate Guest/In-Law Quarters

    • Media Room

    • Storage

    Bedrooms and bathrooms

    • Bedrooms: 5

    • Bathrooms: 1

    • Full bathrooms: 6

  • Parking

    • Additional Spaces Available

    • Circular Driveway

    • Driveway

    Lot

    • Lot: 18300 Square Feet

    Other Property Information

    • Parcel Number: 24-52-05-009-0190

    • Zoning: 2001

  • Type and style

    • Property Type: Residential

    • Property Sub Type: Single Family Residence

  • Other financial information

    • Annual tax amount: $172,413

  • Source details

    • MLS ID: A11782312

    Other facts

    • Construction Materials: CBS Construction

    • Lot Features: 1/4 To Less Than 1/2 Acre Lot

    • Patio And Porch Features: Deck

    • Pool Features: In Ground

    • Direction Faces: East

    • Architectural Style: Attached / Two Story

    • Waterfront: Yes

    • Garage Spaces: 2

    • Attached Garage: Yes

    • Garage: Yes

    • Living Area: 5226

    • Water Source: Municipal Water

    • Subdivision Name: MASHTA ISLAND A REPLAT OF

Private inquiry
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The multiple listing information is provided by the Miami Association of REALTORS® from a copyrighted compilation of listings. The compilation of listings and each individual listing are ©2026-present Miami Association of REALTORS®. All Rights Reserved. The information provided is for consumers' personal, noncommercial use and may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing. All properties are subject to prior sale or withdrawal. All information provided is deemed reliable but is not guaranteed accurate, and should be independently verified. Listing courtesy of: DLS International Realty