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Active Single Family Residence
$8,500,000
238 Buttonwood Dr, Key Biscayne FL 33149, Key Biscayne, FL 33149
6 Beds
Bedrooms
7 Baths
Bathrooms
4,190 sqft
Living Area
2026
Year Built
Market Insight

The listing price is 53.1% above the average comparable sale price per square foot. It is $3,115,000 above the median comparable sale price of $4,885,000.

About This Property

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

Property Type Single Family Residence
Days on Market Just listed
HOA Fee None
Parking — spaces
Pool No
Waterfront No
Community TROPICAL ISLE HOMES SUB 4
Pets Allowed Yes

Assigned Schools

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School Grades Address Report Card
Key Biscayne K-8 Center
Elementary 305-361-5418
PK-8
150 W McIntire St., Key Biscayne, FL 33149
Ponce de Leon Middle
Middle 305-661-1611
6-8
5801 Augusto St., Coral Gables, FL 33146
Coral Gables Senior High
High School 305-443-4871
9-12
450 Bird Rd., Coral Gables, FL 33146

Source: County GIS attendance zone boundaries. Assignments are based on property location and may change. Use Miami-Dade County Public Schools's official locator to confirm.

Location

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Comparable Sales

10 closed sales · 1-mile radius · last 12 months · Key Biscayne

Est. Market Value
$5,068,229
Range: $4,750,000 – $5,265,000
Listed 67.7% above estimated market value ($3,431,771 over comps). Buyers should negotiate.
Address
Closed
Price
Beds
Baths
Sqft
vs Ask
635 Curtiswood Dr, Key Biscayne FL 33149
BISCAYNE KEY ESTATES · 1951
$4,950,000
Apr 20, 2026
$4,950,000
$1,273/sf
6
6
3,888
+0%
561 Hampton Ln, Key Biscayne FL 33149
TROPICAL ISLE HOMES SUB · 2013
$4,820,000
Aug 15, 2025
$4,990,000
$1,157/sf
6
7
4,165
-3.4%
285 Woodcrest Rd, Key Biscayne FL 33149
TROPICAL ISLE HOMES SUB 4,TROPIAL ISLE HOMES · 2025
$6,700,000
Apr 22, 2026
$6,655,000
$1,903/sf
6
6
3,520
+0.7%
285 W Enid Dr, Key Biscayne FL 33149
BISCAYNE KEY ESTATES · 1998
$4,200,000
Mar 27, 2026
$4,545,000
$1,222/sf
6
6
3,436
-7.6%
320 Woodcrest Rd, Key Biscayne FL 33149
TROPICAL ISLE HOMES SUB 4 · 2014
$5,220,000
Oct 1, 2025
$5,250,000
$1,397/sf
6
6
3,737
-0.6%
762 Fernwood Rd, Key Biscayne FL 33149
BISCAYNE KEY ESTATES · 2014
$4,750,000
May 28, 2025
$4,999,000
$1,325/sf
6
5
3,584
-5%
116 W MASHTA DR, Key Biscayne FL 33149
County records · 2014
$4,350,000
Nov 26, 2024
$1,199/sf
6
6
3,628
20 GRAND BAY ESTATES CIR, Key Biscayne FL 33149
County records · 2000
$3,643,500
Jul 24, 2024
$997/sf
6
6
3,655
200 W Mcintyre St, Key Biscayne FL 33149
TROPICAL ISLE HOMES SUB · 1950
$3,700,000
Jan 27, 2026
$3,997,000
$934/sf
5
5
3,962
-7.4%
201 Buttonwood Dr, Key Biscayne FL 33149
TROPICAL ISLE HOMES SUB 4 · 2020
$5,265,000
Dec 3, 2025
$5,999,000
$1,389/sf
5
7
3,791
-12.2%
$4,885,000
Median Sale
$4,950,625
Trimmed Avg
$1,325/sf
Avg $/sqft
8 sales
Comps Found

Comp data from Miami MLS. Estimate is automated and does not account for condition, upgrades, or lot features. For a full CMA, contact Dayron Crespo, Broker.

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