House Prices

Mashta Island Key Biscayne, FL House Prices & Home Values 2026


Average Data

average house price$2,998,955
average size per house2667 ft²
average price per ft²1227 $ / ft²

04/05/2026 - The value range (VR) for house prices in Mashta Island Key Biscayne, FL is $1165.65/ sqft to $1288.35/ sqft. An average home with 2667 sqft costs approximately $3,391,689 to $3,748,709. Key Biscayne, FL includes 1 ZIP codes and it is located in Miami Dade county. The lowest prices are found in ZIP 33149, while the highest are in ZIP 33149. The average price per sqare feet is $1227. Our analysis is based on 16 property listings.

Avergage prices by ZIP codes Mashta Island Key Biscayne

33149913 $ / ft²




Historical development of home values in Mashta Island Key Biscayne

Year Estimated value (USD) Change vs. 2025
2010 $1,392,769 -53.6%
2011 $1,338,910 -55.4%
2012 $1,335,306 -55.5%
2013 $1,385,216 -53.8%
2014 $1,454,095 -51.5%
2015 $1,528,724 -49.0%
2016 $1,608,503 -46.4%
2017 $1,695,321 -43.5%
2018 $1,789,048 -40.3%
2019 $1,872,003 -37.6%
2020 $1,968,776 -34.4%
2021 $2,239,271 -25.3%
2022 $2,610,487 -13.0%
2023 $2,752,879 -8.2%
2024 $2,912,138 -2.9%
2025 $2,998,955 0.0%

Graph: estimated home values in Mashta Island Key Biscayne over time (USD)



Example: 100% financing house in Mashta Island Key Biscayne

Loan amount: $2,998,955

Interest rate: 6.55%

Fixed monthly payment: $19,046.25

Breakdown in the 1st month:
Interest portion: $16,359.30  –  Principal portion: $2,686.95

Yearly breakdown (100% financing)

Year Interest per year ($) Principal per year ($) Remaining balance at year-end ($)
1 $195,326.40 $33,228.60 $2,965,726.40
2 $193,084.80 $35,470.21 $2,930,256.19
3 $190,691.97 $37,863.03 $2,892,393.15
4 $188,137.73 $40,417.28 $2,851,975.87
5 $185,411.17 $43,143.83 $2,808,832.04
6 $182,500.69 $46,054.32 $2,762,777.72
7 $179,393.86 $49,161.15 $2,713,616.57
8 $176,077.44 $52,477.57 $2,661,139.00
9 $172,537.30 $56,017.71 $2,605,121.29
10 $168,758.33 $59,796.67 $2,545,324.61
11 $164,724.44 $63,830.56 $2,481,494.05
12 $160,418.43 $68,136.58 $2,413,357.47
13 $155,821.93 $72,733.08 $2,340,624.39
14 $150,915.34 $77,639.66 $2,262,984.72
15 $145,677.76 $82,877.25 $2,180,107.48
16 $140,086.85 $88,468.15 $2,091,639.33
17 $134,118.78 $94,436.23 $1,997,203.10
18 $127,748.10 $100,806.90 $1,896,396.19
19 $120,947.66 $107,607.35 $1,788,788.84
20 $113,688.45 $114,866.55 $1,673,922.29
21 $105,939.54 $122,615.47 $1,551,306.82
22 $97,667.89 $130,887.12 $1,420,419.70
23 $88,838.23 $139,716.78 $1,280,702.92
24 $79,412.92 $149,142.09 $1,131,560.83
25 $69,351.77 $159,203.23 $972,357.60
26 $58,611.90 $169,943.10 $802,414.50
27 $47,147.52 $181,407.48 $621,007.01
28 $34,909.75 $193,645.25 $427,361.76
29 $21,846.42 $206,708.59 $220,653.17
30 $7,901.84 $220,653.17 $0.00

Note: The calculation is based on a standard annuity mortgage with a fixed monthly payment over the entire term. Extra payments, interest rate changes, and additional purchase costs (e.g. taxes, notary fees) are not included.


How to sell in Mashta Island Key Biscayne, FL


1500 sqft3900 sqft
Ø selling price$2,429,663$5,168,555
Ø fast selling$2,208,785$4,651,700
Ø high price sale$2,650,541$5,685,411

In 2026, houses in Mashta Island Key Biscayne, FL will be offered at an average price of $1227 per square foot. A 1,500 sqft home priced at $2,429,663 is 25.09% more expensive per square foot than a 3,900 sqft home priced at $5,168,555. Home prices in Mashta Island Key Biscayne, FL vary significantly depending on the property’s condition and exact location. For a quick sale, a 2,700 sqft home should be listed at around $3,578,231. Sellers who can wait longer may achieve a higher price of up to $4,373,393.


Mashta Island, Key Biscayne: Luxury Waterfront Neighborhood

Mashta Island in Key Biscayne, FL is a coveted luxury waterfront enclave set between Biscayne Bay and the Atlantic. This exclusive neighborhood offers serene island living with panoramic water views, tropical landscaping, and a quiet, low-traffic setting.
Residents enjoy year-round boating, paddleboarding, and sunrise-to-sunset vistas from private backyards and terraces.

Real Estate and Amenities

Mashta Island real estate features custom estates and contemporary residences with deep-water dockage, pools, and expansive lots designed for privacy. Homes frequently showcase high-end finishes, smart-home technology, and floor-to-ceiling glass to maximize natural light and bay breezes.
Buyers seeking Key Biscayne waterfront homes value the island?s rare combination of protected canals and open-bay frontage. Strong demand, limited inventory, and exceptional build quality support resilient property values and long-term investment potential.

Access and Nearby Attractions

The neighborhood sits minutes from the Key Biscayne K-8 Center, the Ritz-Carlton, and Bill Baggs Cape Florida State Park with its iconic lighthouse. Convenient access via the Rickenbacker Causeway places residents close to Brickell, Downtown Miami, and Miami International Airport.
Whether relocating or upgrading, homebuyers choose Mashta Island for its unmatched privacy, boating lifestyle, and premier Key Biscayne address.



FAQ – Home Values in Mashta Island Key Biscayne

What is the median home value in Mashta Island Key Biscayne in 2026?

In 2026, the typical home value in Mashta Island Key Biscayne is about $2,998,955 for an average home size of 2667 square feet. This corresponds to an average price of roughly $1227 per square foot.

What is the average cost per square foot in Mashta Island Key Biscayne?

In 2026, homes in Mashta Island Key Biscayne sell for an average of around $1227 per square foot, with a typical range between $1165.65 and $1288.35 per square foot, depending on the property’s location, condition, and lot size.

What is the average home size in Mashta Island?

The average home size in Mashta Island Key Biscayne is about 2667 square feet, with an estimated 2026 value around $2,998,955.



Neighborhoods close to Mashta Island Key Biscayne, FL

The Hammocks Miami, FL196 $ / ft²
Woodmont Fort Lauderdale, FL189 $ / ft²
Singer Island West Palm Beach, FL314 $ / ft²
Flagami Miami, FL323 $ / ft²
Gifford Vero Beach, FL181 $ / ft²
Lockmar Estates Palm Bay, FL139 $ / ft²
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