660 S Mashta Dr
Key Biscayne, FL 33149
- 7 Beds
- 8.5 Baths
- 5,043 sqft (on 0.34 acres)
7 Beds
8.5 Baths
5,043 sqft
(on 0.34 acres)
Local Information
-- mins to
Description
Don't miss this opportunity to own a rarely available wide bay front home on S Mashta Dr featuring 100 ft of water frontage & unobstructed views. This large 2 story home has an eat in kitchen, 3 door wine chiller & separate walk-in pantry/storage area. An adjacent covered patio is separated from the kitchen by multi sliding impact doors that open & stack against each other expanding your entertaining space & bringing the outside in. The primary BR has 2 full baths & 3 walk-in closets. There are an additional 4 BR's & 4 baths on the first floor, one of which has a kitchenette & a separate entrance. A mosaic staircase leads to 2 additional bedrooms w/ensuite baths & a large shared balcony Additional amenities include heated pool, cabana bath & an expansive patio for entertaining.
660 S Mashta Dr, Key Biscayne, FL 33149 is a 7 bedroom, 9 bathroom, 5,043 sqft single-family home built in 1965. It last sold for $13,800,000 on Mar 28, 2025 (19% below the $16,999,000 asking price). It is currently off market. The Trulia Estimate is $13,533,300, with a rent estimate of $93,925/month.
Home Highlights
Parking
Open Parking
Outdoor
Patio, Deck, Pool
View
Bay
HOA
None
Price/Sqft
No Info
Listed
180+ days ago
Home Details for 660 S Mashta Dr
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Beds & Baths Number of Bedrooms: 7Number of Bathrooms: 9Number of Bathrooms (full): 8Number of Bathrooms (half): 1 |
Dimensions and Layout Living Area: 5043 Square Feet |
Appliances & Utilities Appliances: Dishwasher, Disposal, Dryer, Electric Range, Refrigerator, Oven, WasherDishwasherDisposalDryerLaundry: Laundry RoomRefrigeratorWasher |
Heating & Cooling Heating: ElectricHas CoolingAir Conditioning: ElectricHas HeatingHeating Fuel: Electric |
Fireplace & Spa No Spa |
Windows, Doors, Floors & Walls Window: Electric Shutters, Impact GlassFlooring: Marble |
Levels, Entrance, & Accessibility Stories: 2Entry Location: First Floor EntryAccessibility: Accessible Full Bath, Accessible Approach with Ramp, Roll-In Shower, Accessible Doors, Accessible Hallway(s), Accessible, Accessibly EquippedFloors: Marble |
View Has a ViewView: Bay |
Security Security: Owned Burglar Alarm |
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Exterior Home Features Roof: OtherPatio / Porch: Deck, PatioFencing: FencedHas a Private Pool |
Parking & Garage No GarageHas Open ParkingParking: Driveway |
Pool Pool: Heated, Pool BathPool |
Frontage WaterfrontWaterfront: Ocean Access, No Fixed Bridges, Seawall, WF/Pool/Ocean Access, BayFrontage Type: Bay/HarborRoad Frontage: Public RoadOn Waterfront |
Water & Sewer Sewer: Public Sewer |
Farm & Range Frontage Length: 100Not Allowed to Raise Horses |
Surface & Elevation Elevation Units: Feet |
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Year Built Year Built: 1965 |
Property Type / Style Property Type: ResidentialProperty Subtype: Single Family ResidenceStructure Type: House, DetachedArchitecture: House,Detached |
Building Building Name: Mashta IslandConstruction Materials: CBS Construction |
Property Information Usage of Home: Unknown/WithheldParcel Number: 2452050080300 |
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Price List Price: $16,999,000 |
Status Change & Dates Off Market Date: Tue Feb 18 2025Possession Timing: Funding |
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MLS Status: Closed |
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Direction & Address City: Key BiscayneCommunity: Mashta Island |
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Building Area Building Area: 6195 Square Feet |
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Association for this Listing: A-Miami Association of REALTORSNo HOA |
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Lot Area: 0.34 acres |
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Contingencies: OtherListing Terms: All Cash, Conventional |
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Mls Number: A11526068Water ViewWater View: Bay |
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Source Internet Entire Listing Display |
Last check for updates: about 1 hour ago
Listed by Kathy Green, (305) 343-7457
Coldwell Banker Realty
Bought with: Giulietta Ulloa, (305) 710-6620, BHHS EWM Realty
Originating MLS: A-Miami Association of REALTORS
Source: MIAMI, MLS#A11526068

Price History for 660 S Mashta Dr
| Date | Price | Event | Source |
|---|---|---|---|
| 03/28/2025 | $13,800,000 | Sold | MIAMI #A11526068 |
| 02/18/2025 | $16,999,000 | Pending | MIAMI #A11526068 |
| 09/16/2024 | $16,999,000 | PriceChange | MIAMI #A11526068 |
| 04/24/2024 | $19,999,000 | PriceChange | MIAMI #A11526068 |
| 02/06/2024 | $21,950,000 | Listed For Sale | MIAMI #A11526068 |
| 01/18/2011 | $4,875,000 | Sold | N/A |
| 06/26/1998 | $1,487,000 | 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 | $156,673 |
| Assessment | $10,020,831 |
Home facts updated by county records
Comparable Sales for 660 S Mashta Dr
Address | Distance | Property Type | Sold Price | Sold Date | Bed | Bath | Sqft |
|---|---|---|---|---|---|---|---|
0.51 | Single-Family Home | $6,500,000 | 03/31/26 | 7 | 7.5 | 5,528 | |
0.04 | Single-Family Home | $4,750,000 | 02/04/26 | 4 | 3.5 | 3,382 | |
0.39 | Single-Family Home | $4,950,000 | 04/20/26 | 6 | 6 | 3,888 | |
0.88 | Single-Family Home | $17,500,000 | 07/08/26 | 7 | 7.5 | 6,240 | |
0.75 | Single-Family Home | $21,000,000 | 02/26/26 | 6 | 7 | 8,031 | |
0.46 | Single-Family Home | $6,350,000 | 07/31/25 | 5 | 5.5 | 3,525 | |
0.60 | Single-Family Home | $4,820,000 | 08/15/25 | 6 | 6.5 | 4,165 | |
0.49 | Single-Family Home | $4,200,000 | 03/27/26 | 6 | 5.5 | 3,436 | |
0.37 | Single-Family Home | $23,500,000 | 07/06/26 | 3 | 5 | 10,926 |
Nearby homes
Get a sense of prices in the area by checking nearby homes.Assigned Schools
These are the assigned schools for 660 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
85 % Say people would walk alone at night
85 % 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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