Mansion
$19,800,000
100 Cape Florida Dr, Key Biscayne FL 33149 – Residential
Cape Florida Dr
- 4 beds
- 7 baths
- 8,240 sqft
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Beds
8
Baths
4,565
SQUARE FEET
Single Family Residence
Type
2020
Built
Listing courtesy of
One Sotheby's International Realty
Mark Chatburn
MLS® #A12034564
Listing information last updated June 26, 2026
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Overview
This single family residence in Key Biscayne has 7 bedrooms and 8 bathrooms across 4,565 square feet, and is listed for sale at $7,450,000 (about $1,632 per square foot). Built in 2020.
Discover this striking contemporary residence, perfectly positioned on an oversized 9,258 SF lot on Harbor Drive, one of Key Biscayne’s most elegant and prestigious streets.
Built in 2020, this architectural masterpiece offers 6 bedrooms plus a private office, 7 full baths, and 2 powder rooms across 4,565 SF of beautifully designed living space. Filled with natural light, the home showcases expansive open living areas, impressive volume throughout, and a sleek custom kitchen featuring bespoke cabinetry and top-of-the-line finishes.
An elevator provides seamless access to all three levels, culminating in a spectacular rooftop terrace with captivating island views and refreshing bay breezes…a unique advantage of being just moments from the water.
Designed for effortless indoor-outdoor living, the exterior features a resort-style saltwater pool and spa, summer kitchen, cabana bath, and generous entertaining areas surrounded by lush tropical landscaping.
Additional highlights include, EV charger, and ample driveway parking. Combining exceptional design, comfort, and functionality, this residence embodies the very best of island living in one of Key Biscayne’s most distinguished locations.
Just minutes from Miami, Key Biscayne is a hidden island paradise where pristine beaches, world-class outdoor recreation, and a relaxed yet sophisticated lifestyle come together in a way that few places can match.
Listing history
Listed for sale
Jun 12, 2026 · MIAMI MLS
$7,450,000
Days on market
as of today
39 days
Building & financials
FROM MIAMI MLSThe carrying-cost and structural facts that close or kill a Miami deal — straight from the listing feed.
Annual property tax (2025)
$89,673
Association type
None
Dues, taxes, and association data per MIAMI MLS and public records; flood zone from FEMA NFHL. Verify with the HOA, county, and your insurer during due diligence.
Property details
MLS #A12034564
Price$7,450,000
Size4,565 Square Feet
Bedrooms7
Bathrooms8
Garage1
Year built2020
TypeSingle Family Residence
StatusFor Sale
Price / Square Feet$1,632
Features & amenities
Built-in Features
Built-In Grill
Closet Cabinetry
Cooking Island
Dishwasher
Disposal
Dryer
Electric Range
Elevator
First Floor Entry
Has a View
Has Carport
Has Cooling System
Has Garage
Has Heating System
Microwave
Open Balcony
Open Parking
Other
Outdoor Shower
Refrigerator
Spa
Storage
Utility/Laundry In Garage
Volume Ceilings
Walk-In Closet(s)
Wall Oven
Washer
Location
425 Harbor Dr, Key Biscayne FL 33149
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Property tax (est.)—
Down (20%)—
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List your rental →Listing data © MIAMI MLS · IDX information deemed reliable but not guaranteed · 39 days on market.
We do not advertise a “free” buyer’s agent; buyer-representation compensation is disclosed in writing. Bitcoin pricing is indicative and updates with the market — not financial, tax, or legal advice. Buyer to independently verify all measurements, assessments, and flood & insurance facts.