128 Days on Market
House for Sale
$237,000,000
5 bd · 9 ba · 11,528 sqft
485 W Matheson Dr, Key Biscayne, FL 33149
TROPICAL ISLE HOMES RESUB
Bedrooms
Bathrooms
Key Biscayne Luxury Homes for Sale
112 listings
13 Days on Market
House for Sale
$27,900,000
8 bd · 9 ba · 9,159 sqft
241 Cape Florida Dr, Key Biscayne, FL 33149
CAPE FLORIDA SUB SEC 3
340 Days on Market
House for Sale
$25,900,000
4 bd · 4 ba · 2,566 sqft
200 Harbor Dr, Key Biscayne, FL 33149
TROPICAL ISLE HOMES SUB 4
92 Days on Market
House for Sale
$19,950,000
6 bd · 7 ba · 6,208 sqft
120 Knollwood Dr, Key Biscayne, FL 33149
CAPE FLA SUB SEC 2
14 Days on Market
House for Sale
$19,900,000
5 bd · 4 ba · 3,085 sqft
520 S Mashta Dr, Key Biscayne, FL 33149
MASHTA ISLAND A REPLAT OF
151 Days on Market
House for Sale
$19,800,000
4 bd · 9 ba · 8,240 sqft
100 Cape Florida Dr, Key Biscayne, FL 33149
CAPE FLORIDA SUB SEC 3
180 Days on Market
Condo for Sale
$18,900,000
5 bd · 6 ba · 8,435 sqft
445 Grand Bay Drive # PH-1A, Key Biscayne, FL 33149
GRAND BAY
54 Days on Market
Condo for Sale
$18,500,000
5 bd · 6 ba · 4,566 sqft
799 Crandon Blvd # PH-8, Key Biscayne, FL 33149
OCEAN CLUB
73 Days on Market
House for Sale
$18,500,000
4 bd · 4.5 ba · 2,255 sqft
631 N Mashta Drive, Key Biscayne, FL 33149
136 Days on Market
Condo for Sale
$17,900,000
5 bd · 6 ba · 4,764 sqft
350 Ocean Dr # LPH2N, Key Biscayne, FL 33149
OCEANA KEY BISCAYNE
170 Days on Market
House for Sale
$16,800,000
4 bd · 4 ba · 3,620 sqft
640 S Mashta Dr, Key Biscayne, FL 33149
MASHTA ISLAND
Newly Listed
House for Sale
$16,500,000
6 bd · 7 ba · 7,103 sqft
131 Cape Florida Dr, Key Biscayne, FL 33149
CAPE FLORIDA SUB SEC 3
Newly Listed
House for Sale
$14,990,000
4 bd · 6 ba · 6,661 sqft
161 Cape Florida Drive, Key Biscayne, FL 33149
CAPE FLORIDA SUB SEC 3
417 Days on Market
House for Sale
$12,485,000
6 bd · 8 ba · 6,405 sqft
420 Island Dr, Key Biscayne, FL 33149
CAPE FLORIDA SUB SEC 1
Newly Listed
Home for Sale
$11,750,000
7 bd · 6 ba · 5,074 sqft
110 Reef Ln # 10, Key Biscayne, FL 33149
OCEANA KEY BISCAYNE
202 Days on Market
Condo for Sale
$11,495,000
4 bd · 6 ba · 3,787 sqft
350 Ocean Dr # 701N, Key Biscayne, FL 33149
Oceana Key Biscayne
536 Days on Market
House for Sale
$9,800,000
6 bd · 7 ba · 5,826 sqft
31 Island Dr, Key Biscayne, FL 33149
CAPE FLORIDA SUB SEC 3
37 Days on Market
House for Sale
$9,200,000
5 bd · 6 ba · 4,416 sqft
625 Curtiswood Dr, Key Biscayne, FL 33149
BISCAYNE KEY ESTATES
257 Days on Market
Condo for Sale
$8,950,000
4 bd · 7 ba · 3,798 sqft
350 E Ocean Dr # 301N, Key Biscayne, FL 33149
Oceana Key Biscayne
123 Days on Market
House for Sale
$8,500,000
6 bd · 7 ba · 4,190 sqft
238 Buttonwood Dr, Key Biscayne, FL 33149
TROPICAL ISLE HOMES SUB 4
24 Days on Market
House for Sale
$8,000,000
6 bd · 6 ba · 1,044 sqft
544 Warren Ln, Key Biscayne, FL 33149
TROPICAL ISLE HOMES SUB
353 Days on Market
House for Sale
$7,950,000
5 bd · 5 ba · 4,166 sqft
545 SABAL PALM, Key Biscayne, FL 33149
TROPICAL ISLE HOMES SUB 2N
110 Days on Market
House for Sale
$7,490,000
5 bd · 7 ba · 3,768 sqft
571 Glenridge Rd, Key Biscayne, FL 33149
TROPICAL ISLE HOMES SUB
97 Days on Market
House for Sale
$7,450,000
7 bd · 9 ba · 4,565 sqft
425 Harbor Dr, Key Biscayne, FL 33149
TROPICAL ISLE HOMES SUB 3
Talk to a local agent
Looking at Key Biscayne Luxury Homes?
Tell us what you're after — we'll send matching homes, off-market options and recent sales, and set up private showings.
Live MLS inventory in Key Biscayne, updated continuously. Florida Lux Real Estate currently tracks 112 active listings here. MLS inventory updated October 11, 2026.
Luxury Homes for Sale in Key Biscayne: What to Know Before You Search
Beyond the Rickenbacker tollgate, tucked between two state parks, Key Biscayne functions as Miami's island village — a K-8 school and streets where children pedal to the beach. Ordinance limits the condo count and no new building has opened since 2014, which means the scarcity driving prices here is entirely real.
The top tier in Key Biscayne runs on its own logic — a good share of the finest properties change hands quietly, terms often matter as much as price, and the buyer pool is international. Known for a family island village between two state parks, fifteen minutes from Brickell, Key Biscayne draws capital from well beyond Florida, and representation counts: we watch off-market availability alongside everything published on this page.
Key Biscayne Market Snapshot
227
Homes sold, last 12 months
$1.6M
Median sale price
61 days
Median time on market
Frequently Asked Questions
Do luxury homes in Key Biscayne ever sell off-market?
Regularly. A meaningful slice of the high end in Key Biscayne trades privately — owners who value discretion, buildings where residents get first look. Give us your criteria and we'll canvass past what's public; at this level that's simply how it's done.
How do international buyers purchase in Key Biscayne?
Foreign nationals buy Florida real estate freely, in cash or through foreign-national loan programs, often holding title in an LLC for privacy and planning. FIRPTA touches the eventual sale, not the purchase. We coordinate with tax counsel so the ownership structure is right from the start.
How do I arrange a showing in Key Biscayne?
Each listing on this page carries an inquiry form that goes straight to our brokerage — or reach us at +1 786-370-8570. We schedule private tours to fit your calendar and run live video walkthroughs for buyers relocating from out of state, with no obligation attached.
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Homes Nearby Key Biscayne: Neighborhoods
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Homes Nearby Key Biscayne: ZIP Codes
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