238 Buttonwood Dr
Key Biscayne, FL 33149
$8,500,000
$2,029/ft²
About this home
A unique architectural masterpiece in the heart of Key Biscayne, this brand-new contemporary residence by Praxis Architecture blends modern tropical luxury with exceptional craftsmanship and bespoke European finishes. Set on an oversized 9,000 SF lot, the residence offers 6 bedrooms, 6 full bathrooms, 1 half bath, and over 4,190 SF of curated living space designed around natural light, privacy, and seamless indoor-outdoor living. Imported Spanish porcelain and ceramic surfaces, Italian-engineered wood flooring, Portuguese interior doors, and refined finishes sourced from the United Kingdom create a warm and sophisticated architectural atmosphere throughout. Custom millwork — including the kitchen, bar, wardrobes, and integrated TV units — was exclusively crafted by a French maison specializing in ultra-luxury bespoke cabinetry. The residence highly designed kitchen is equipped with Wolf, Sub-Zero, and Miele appliances, smart-home automation, and integrated security. Outdoor spaces feature a spectacular 36-foot swimming pool, expansive terraces, summer kitchen, lush private garden patio, and multiple entertaining areas designed for effortless resort-style living. Located moments from tennis courts and the Key Biscayne Yacht Club, beaches, marinas, top-rated schools, and the best of island living, this residence represents one of Key Biscayne’s most thoughtfully designed brand new-construction homes - Expected to be finished in July 2026. Easy to Show!
Property details
Listing
- MLS #
- A12021891
- Status
- For sale
- Listed on
- May 21, 2026
- Days on market
- 80 days
- Listing data updated
- May 21, 2026
Interior
- Beds
- 6
- Baths
- 6.5
- Living area
- 4,190 ft²
- Price per ft²
- $2,029/ft²
Building & community
- Type
- Single-family home
- Year built
- 2026
- County
- Miami-Dade
Lot & exterior
- Lot size
- 8,916 ft²
Days on market, price per ft² and the monthly HOA amount are calculated by this site from the MLS data shown; the association fee is normalized to a monthly figure.
True monthly cost
- Mortgage (principal & interest)
- $42,981
- Property taxes (est.)
- $7,792
- Home insurance (est.)
- $600
- Flood insurance (est.)
- —
Estimated total$51,373*/mo
* Some cost lines aren't available yet for this listing; the total shown is incomplete.
Based on 20% down, a 6.5% rate and a 30-year loan, plus this home's estimated Florida carrying costs. All figures are illustrative estimates — not quotes, not financial or insurance advice.
Sources: flood zone — FEMA National Flood Hazard Layer; mortgage, taxes and insurance figures — this site's own estimates; HOA / CDD — as reported for this listing.
What will this home really cost you?
Location
Mortgage calculator
$42,981/moEstimated principal & interest. Taxes, insurance, and HOA are not included. This is an estimate, not a quote or financial advice.
This listing is courtesy of Douglas Elliman.
Fernanda Moreno · 786-300-6334 · fernanda.moreno@elliman.com · 305-677-5000
Data deemed reliable, but is not guaranteed accurate by MIAMI REALTORS®.
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