logo
Properties
Explore our listings
Buy
Listings for sale
Rent
Listings for rent
Explore
Neighborhoods, buildings & trends
Neighborhoods
Check neighborhoods information
Buildings
Check buildings information
Pre-Construction
New developments on sale
Market Trends
Monthly market data & analysis
Resources
Blog, tools & guides
Blog
Articles & guides
Tax Calculator
Compare tax savings
Property Tax Calculator
Estimate your annual tax
Sell Your Home
Get a free home valuation
Contact
Tell us about your needs
Language
Change website language
English
Русский
Español
中文(简体)
Sign In
Sign in or register

520 S MASHTA DR, Key Biscayne FL 33149

House Recently Sold
$16,500,000

BTC: 257.81250000

ETH: 9,269.66292135

Sold on: 2024-02-26
26 days
Waterfront
4 bds
4 ba
3,085 sqft

Overview

CROWN JEWEL OF KEY BISCAYNE! Captivating wide open Bay vistas on rare sought after S. Mashta Drive. Situated among luxurious multi-million dollar mansions, it offers unparalleled privacy and security. Highlight of this property is its expansive 22,140 sq.ft. WF lot providing breathtaking views of the Bay, from private yachts passing by to mesmerizing sunsets. Enjoy 3,085 sq.ft. recently renovated “Hamptons like” villa as you imagine your dream home. Home can also be easily leased to generate income. Excellent school system, Int'l boutiques, and restaurants. Nestled between two exquisite parks boasting pristine white sandy beaches, golf & tennis centers. Twenty minutes from vibrant areas of Brickell Ave & Coconut Grove. 25 minutes from heart of S. Beach and Miami Int’l. airport.

Location

Florida • Key Biscayne • 33149 • House • Recently Sold • Waterfront

Details

Type:
Residential
Parking:
Covered / Guest
Year Built:
1961
Lot:
22140 Square Feet
Heating:
Central
Price/sqft:
$5,575
Cooling:
Central Air
HOA:
No Data

Valuation

Our model vs. what's actually selling nearby.
Estimate
$1,722,450
$1.1M – $5.0M
Confidence Low
List vs. estimate
$15.5M above estimate
List $17,200,000 · +898.6%
Our model says this listing is priced above recent comparable activity. Room to negotiate.
Price per sq ft
$5,575
+189.5% vs. city median $1,925
Based on
12 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
$163,377
2022
Pool
In Ground
View
Bay, Water
Waterfront
Ocean Access, No Fixed Bridges
Garage
2 car garage
Pets
Not allowed
All facts and features

  • Flooring

    • Ceramic Floor

    Heating

    • Central

    Cooling

    • Central Air

    Appliances

    • Dishwasher

    • Disposal

    • Dryer

    • Microwave

    • Electric Range

    • Refrigerator

    Other interior features

    • First Floor Entry

    • Cooking Island

    • Pantry

    • Split Bedroom

    • Walk-In Closet(s)

    • Utility Room/Laundry

    Bedrooms and bathrooms

    • Bedrooms: 4

    • Full bathrooms: 4

  • Parking

    • Covered

    • Guest

    Property

    • Exterior Features: Lighting

    Lot

    • Lot: 22140 Square Feet

    Other Property Information

    • Parcel Number: 24-52-05-009-0170

    • Zoning: 20/ESTAT

  • Type and style

    • Property Type: Residential

    • Property Sub Type: Single Family Residence

  • Other financial information

    • Annual tax amount: $163,377

  • Source details

    • MLS ID: A11502495

    Other facts

    • Construction Materials: Concrete Block Construction

    • Laundry Features: Utility Room/Laundry

    • Lot Features: 1/2 To Less Than 3/4 Acre Lot

    • Patio And Porch Features: Patio

    • Pool Features: In Ground

    • Window Features: Sliding

    • Direction Faces: West

    • Architectural Style: Detached / One Story

    • Waterfront: Yes

    • Garage Spaces: 2

    • Garage: Yes

    • Living Area: 3085

    • Water Source: Municipal Water

    • Subdivision Name: MASHTA ISLAND

Private inquiry
Talk to the advisor on this listing.
Floor plans, HOA docs, off-market comparables, scheduling a private showing — one message, direct to the local specialist.

More like this

Recently Sold
$14,600,000
House
7 bds · 6 ba · 6,490 sqft
MASHTA ISLAND A REPLAT OF,MASHTA ISLAND, Key Biscayne
610 S Mashta Dr, Key Biscayne FL 33149
Recently Sold
$14,850,000
House
7 bds · 7 ba · 9,848 sqft
BISCAYNE KEY ESTATES, Key Biscayne
766 Harbor Dr, Key Biscayne FL 33149
Recently Sold
$16,875,000
House
5 bds · 7 ba · 6,869 sqft
TROPICAL ISLE HOMES SUB 4, Key Biscayne
220 Harbor Dr, Key Biscayne FL 33149
Recently Sold
$19,500,000
House
4 bds · 4 ba · 2,566 sqft
TROPICAL ISLE HOMES SUB 4, Key Biscayne
200 Harbor Dr, Key Biscayne FL 33149
Recently Sold
$18,921,250
House
5 bds · 6 ba · 5,226 sqft
MASHTA ISLAND A REPLAT OF, Key Biscayne
510 S Mashta Dr, Key Biscayne FL 33149
Recently Sold
$14,650,000
House
6 bds · 5 ba · 4,414 sqft
MATHESON ESTATES, Key Biscayne
470 W Matheson Dr, Key Biscayne FL 33149
Recently Sold
$11,375,000
Penthouse
5 bds · 5 ba · 8,435 sqft
GRAND BAY RESIDENCES COND,GRAND BAY, Key Biscayne
445 Grand Bay Dr # 1A, Key Biscayne FL 33149
Recently Sold
$11,800,000
House
3 bds · 3 ba · 4,510 sqft
MASHTA ISLAND A REPLAT OF, Key Biscayne
511 N Mashta Dr, Key Biscayne FL 33149

Market around this address

Live counts in the same area.
View all
This zip
33149
161
median $2.6M
Active
Same city
Key Biscayne
160
median $2.6M
Active
Same type
House
49
median $7.0M
Active
Similar price
$12.0M – $22.4M
11
median $18.5M
Active

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: Fortune Christie's International Real Estate