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#A11641157, Carlos Mandiola, Listing office: Coldwell Banker Realty
#RX-11060323·
Listing office: Coldwell Banker·
Listing agent: Javier Gustavo Quiroz·
Listing agent phone: (305) 909-5940·
Listing office phone: (561) 395-2233
$23,500,000 List price
631 N Mashta Dr Key Biscayne, FL 33149
4 beds
4 full, 1 partial
2,255 sqft
$10,421 / sqft
House
Property details
About 631 N Mashta Dr
BRING ALL OFFERS - Waterfront Dream Home in the Making!Key Biscayne's Ultimate Boater's Paradise - Fully Renovated Luxury Residence Coming SoonThis is a rare and exceptional opportunity to own a like-new, fully renovated luxury home in one of Key Biscayne's most exclusive waterfront enclaves. Currently under an extensive renovation with expected completion in approximately 5 months, this residence is being reimagined with the highest standards of modern design, comfort, and functionality.A Complete Transformation - Inside and OutThis is not just a cosmetic update -- this is a down-to-the-studs, full-scale renovation that will result in a completely refreshed and reimagined home. Upon completion, this property will boast:
Highlights
Home typeSingle Family Residence
HeatingCentral, Electric
StatusActive
CoolingCentral Air
Size2,255 sqft
Year built1958
ParkingCarport - Attached, Driveway
MLS #RX-11060323
WaterfrontIntracoastal, Seawall
ViewIntracoastal, Pool
Private poolYes
Virtual tour
Summary
- Partial Bathrooms: 1
- Full Bathrooms: 4
- Appliances: None
- Flooring Type: Concrete
- Interior: None
- Total Bedroom Count: 4
- Private Pool: Yes
- Parking: Carport - Attached, Driveway
- Waterfront: Intracoastal, Seawall
- View: Intracoastal, Pool
- Exterior: Covered Patio, Open Patio
- Heating: Central, Electric
- Cooling: Central Air
- List Price: $23,500,000
- Price/SqFt: $10,421
- Annual Tax Amount: $102,889
- Tax Year: 2023
- Year Built: 1958
- Stories: 1
- Living Area: 2,255 SqFt
- MLS Number: RX-11060323
- Office Name: Coldwell Banker
- Office Phone: (561) 395-2233
- Listing Agent: Javier Gustavo Quiroz
- Agent Phone: (305) 909-5940
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This information is not verified for authenticity or accuracy and is not guaranteed. IDX information is provided exclusively for consumers’ personal, non-commercial use, that it may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing.
Data displayed may be a portion of, and not a complete set of all listings published in the MLS.
Last updated on: 7/10/2025, 2:45:29 PM Eastern. If you have any questions regarding the accuracy of this data, please contact us at help@rockethomes.com.
Price information
Property sales
| Date | Event | Price |
|---|---|---|
| Mar 09, 2022 | Home Sold | $8,500,000 |
Tax history
| Year | Assessment | Property Tax |
|---|---|---|
| 2023 | $6,371,245 | $102,889 |
| 2022 | $6,027,358 | $83,488 |
| 2021 | $4,397,303 | $83,488 |
| 2020 | $4,397,371 | $73,461 |
| 2018 | $4,397,507 | $70,437 |
| 2017 | $6,182,575 | $88,235 |
History based on county public records data.
Nearby schools
8
Key Biscayne K-8 Center
Public District PK-5
0.5 mi
•150 W McIntyre St
9
Coconut Grove Elementary School
Public District PK-5
5.2 mi
•3351 Matilda St
7
Southside Elementary School
Public Magnet PK-5
5.4 mi
•45 SW 13th St
School ratings are a score out of 10, where 10 is the highest and 1 is the lowest.
Neighborhood
The neighbors living near this home have an average income of $134,750. The majority of Key Biscayne, FL residents have income between $100k-200k annually. Most families are married, no kids. The majority of residents in this area have post secondary degree education.
How much money do the neighbors make?
14%
<35k
13%
35k-100k
47%
100k-200k
26%
200k+
What level of education do the neighbors have?
High School Diploma
Post Secondary Degree
Masters Degree
Doctorate
What types of families live nearby?
18%
Single, No Kids
6%
Single, with Kids
39%
Married, No Kids
37%
Married, with Kids
Are the neighbors home owners or renters?
Home Owners
Renters
How old are people in this area?
14%
<11 yrs old
12%
12-17 yrs old
14%
18-34 yrs old
46%
35-64 yrs old
14%
65+ yrs old
What do the neighbors do for fun?
Skiing/snowboarding
Men's Tennis- Tennis
Where do the neighbors shop?
Nordstrom
Bloomingdales
Brooks Brothers
Where do the neighbors go to eat?
California Pizza Kitchen
Bonefish Grill
Qdoba
What do the neighbors drive?
BMW
Lexus
Acura
What do the neighbors listen to?
Talk/Personality
News
Sports
All data provided by Home Junction and Claritas
Similar homes for sale
Frequently asked questions
About 631 N Mashta Dr
The listing price of 631 N Mashta Dr property is $23,500,000.
The property 631 N Mashta Dr is a house located in Key Biscayne, Florida, 33149.
Active Listing: 631 N Mashta Dr is For Sale (Active/New) which means the seller is accepting offers.
The nearby schools for 631 N Mashta Dr are: Key Biscayne K-8 Center (GreatSchools Rating 8/10), Coconut Grove Elementary School (GreatSchools Rating 9/10), Southside Elementary School (GreatSchools Rating 7/10), Mater Grove Academy (GreatSchools Rating 7/10), Shenandoah Middle School (GreatSchools Rating 5/10), George Washington Carver Middle School (GreatSchools Rating 10/10), Mast Academy (GreatSchools Rating 10/10), New World School of the Arts (GreatSchools Rating 9/10), School for Advanced Studies-Wolfson (GreatSchools Rating 10/10).
According to the records, the last property tax for 2023 is $102,889 (source: MLS/based on county public records data).
The last sale was on March 9, 2022 for $8,500,000 (source: MLS/tax record).
The property at 631 N Mashta Dr has 4 bedrooms and 4 full and 1 half bathrooms.
The property 631 N Mashta Dr is 2,255 SqFt (source: MLS/tax record).
The year of construction for 631 N Mashta Dr is 1958.
This home is located at 631 N Mashta Dr in Key Biscayne, FL and zip code 33149. This 2,255 square foot home was built in 1958. Features: 4 bedrooms, 5 bathrooms. It has been listed on Rocket Homes since February 7, 2025 and is currently priced at $23,500,000.
Key Biscayne, FL housing market in June 2025 saw over 0 listings sold above listed price, more than 0 sold at listed price and over 16 sold below. In June 2025 in Key Biscayne, FL there were 1.5% more homes for sale than in May. The median list price of listings available in June 2025 was $1,350,000, while the average time on the real estate market was 104 days.
From Rocket Homes Real Estate and based on county public records data.