Key Biscayne Homes for Sale

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485 W Matheson Dr, Key Biscayne, FL 33149

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

241 Cape Florida Dr, Key Biscayne, FL 33149

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

120 Knollwood Dr, Key Biscayne, FL 33149

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

100 Cape Florida Dr, Key Biscayne, FL 33149

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

445 Grand Bay Drive # PH-1A, Key Biscayne, FL 33149

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

799 Crandon Blvd # PH-8, Key Biscayne, FL 33149

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

631 N Mashta Drive, Key Biscayne, FL 33149

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

350 Ocean Dr # LPH2N, 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

131 Cape Florida Dr, Key Biscayne, FL 33149

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

161 Cape Florida Drive, Key Biscayne, FL 33149

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

110 Reef Ln # 10, Key Biscayne, FL 33149

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

350 Ocean Dr # 701N, Key Biscayne, FL 33149

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

625 Curtiswood Dr, Key Biscayne, FL 33149

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

350 E Ocean Dr # 301N, Key Biscayne, FL 33149

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

238 Buttonwood Dr, Key Biscayne, FL 33149

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

571 Glenridge Rd, Key Biscayne, FL 33149

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 Homes?

Tell us what you're after — we'll send matching homes, off-market options and recent sales, and set up private showings.

Matthew Gromadzki

Real Estate Broker

(786) 370-8570

Live MLS inventory in Key Biscayne, updated continuously. Florida Lux Real Estate currently tracks 144 active listings here. MLS inventory updated October 11, 2026.

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.

This page pulls the entire Key Biscayne for-sale market into one view — houses, condos and townhomes side by side — so you can weigh what the same budget buys across different forms of ownership. Key Biscayne is a market defined by a family island village between two state parks, fifteen minutes from Brickell, and buyers who track it as a whole rather than fixating on one building or subdivision tend to find the better deal in the category they never planned to shop.

Key Biscayne Market Snapshot

227

Homes sold, last 12 months

$1.6M

Median sale price

61 days

Median time on market

Frequently Asked Questions

Is now a sensible time to buy in Key Biscayne?

It depends entirely on the segment — houses, condos and townhomes in Key Biscayne each run on their own supply-and-demand clock. The live tiles on this page report what actually closed over the past year and how long those sales took; ask us and we'll break down the exact slice you're weighing.

What do buyers relocating from another state need to know about Key Biscayne?

Florida charges no state income tax and shields a primary residence through homestead, but the diligence that matters most here is insurance and, for condos, the association's finances. We take every client through reserves, budgets and any pending assessment work before an offer goes in — never after.

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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