421 S Mashta Dr
Key Biscayne, FL 33149
- 5 Beds
- 4 Baths
- 4,536 sqft (on 0.42 acres)
5 Beds
4 Baths
4,536 sqft
(on 0.42 acres)
Local Information
-- mins to
Home Highlights
Property Type
Single-Family Home
Year Built
1980
Lot Size
0.42 acres
Living Area
4,536 sqft
Price/Sqft
$2,617
Parking
Garage
About this House
This single-family home is located at 421 S Mashta Dr, Key Biscayne, FL. 421 S Mashta Dr is in Key Biscayne, FL and in ZIP code 33149. This property has 5 bedrooms, 4 bathrooms and approximately 4,536 sqft of floor space. This property has a lot size of 0.42 acres and was built in 1980.
421 S Mashta Dr, Key Biscayne, FL 33149 is a 5 bedroom, 4 bathroom, 4,536 sqft single-family home built in 1980. It last sold for $4,050,000 on Jun 10, 2005. It is currently off market. The Trulia Estimate is $11,870,600, with a rent estimate of $51,810/month.
Home Details for 421 S Mashta Dr
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Levels, Entrance, & Accessibility Stories: 2 |
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Exterior Home Features Roof: OtherExterior: OtherPatio |
Pool Pool |
Parking & Garage GarageParking: Garage |
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Year Built Year Built: 1980Year Updated: 1980 |
Property Type / Style Property Type: Single Family Home |
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Units in Building: 1 |
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Lot Area: 0.42 acres |
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Greenhouse |
Price History for 421 S Mashta Dr
| Date | Price | Event | Source |
|---|---|---|---|
| 06/10/2005 | $4,050,000 | Sold | N/A |
Market trends in Key Biscayne
Last updated June 2026
Avg. sale price
$1.58M
$113KMoM
Sale-to-List Price
—
Price per sq ft
$945
$37MoM
Available listings
159
9MoM
Property Tax and Assessment
| Year | 2025 |
|---|---|
| Tax | $67,356 |
| Assessment | $9,374,379 |
Home facts updated by county records
Comparable Sales for 421 S Mashta Dr
Address | Distance | Property Type | Sold Price | Sold Date | Bed | Bath | Sqft |
|---|---|---|---|---|---|---|---|
0.33 | Single-Family Home | $4,750,000 | 02/04/26 | 4 | 3.5 | 3,382 | |
0.59 | Single-Family Home | $3,700,000 | 01/27/26 | 5 | 5 | 3,962 | |
0.34 | Single-Family Home | $1,200,000 | 06/05/26 | 4 | 4.5 | 3,241 | |
0.48 | Single-Family Home | $3,125,000 | 03/09/26 | 5 | 3.5 | 2,429 | |
0.50 | Single-Family Home | $4,120,000 | 02/18/26 | 3 | 3 | 2,927 | |
0.44 | Single-Family Home | $3,475,000 | 01/27/26 | 5 | 4.5 | 2,320 | |
0.48 | Single-Family Home | $5,690,000 | 06/15/26 | 6 | 5 | 3,584 | |
0.51 | Single-Family Home | $3,500,000 | 01/16/26 | 4 | 3.5 | 2,775 | |
0.49 | Single-Family Home | $4,950,000 | 04/20/26 | 6 | 6 | 3,888 | |
0.38 | Single-Family Home | $6,500,000 | 03/31/26 | 7 | 7.5 | 5,528 |
Nearby homes
Get a sense of prices in the area by checking nearby homes.Assigned Schools
These are the assigned schools for 421 S Mashta Dr.
What Locals Say about Key Biscayne
At least 116 Trulia users voted on each feature.
94 % Say it's walkable to grocery stores
94 % Say kids play outside
90 % Say it's dog friendly
90 % Say it's walkable to restaurants
86 % Say people would walk alone at night
86 % Say there are sidewalks
79 % Say it's quiet
79 % Say there's holiday spirit
76 % Say they plan to stay for at least 5 years
68 % Say parking is easy
67 % Say streets are well-lit
60 % Say there are community events
58 % Say neighbors are friendly
54 % Say yards are well-kept
52 % Say there's wildlife
50 % Say car is needed
Sourced by Trulia users. Learn more about our methodology.
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