Key Biscayne Single Family 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

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

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

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

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

117 Days on Market

House for Sale

$7,390,000

6 bd · 7 ba · 4,043 sqft

741 Harbor Dr, Key Biscayne, FL 33149

BISCAYNE KEY ESTATES

145 Days on Market

House for Sale

$6,950,000

5 bd · 6 ba · 5,421 sqft

685 Harbor Ln, Key Biscayne, FL 33149

BISCAYNE KEY ESTATES

293 Days on Market

House for Sale

$6,900,000

6 bd · 7 ba · 3,550 sqft

110 Hampton Ln, Key Biscayne, FL 33149

TROPICAL ISLE HOMES SUB 4

Newly Listed

House for Sale

$6,350,000

4 bd · 3 ba · 2,761 sqft

571 S Mashta Dr, Key Biscayne, FL 33149

MASHTA ISLAND A REPLAT OF

16 Days on Market

House for Sale

$5,990,000

5 bd · 5 ba · 4,759 sqft

501 Bay Lane, Key Biscayne, FL 33149

TROPICAL ISLE HOMES SUB 3

9 Days on Market

House for Sale

$5,785,000

5 bd · 6 ba · 3,495 sqft

335 W Enid Dr, Key Biscayne, FL 33149

BISCAYNE KEY ESTATES

Talk to a local agent

Looking at Key Biscayne Single Family 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 34 active listings here. MLS inventory updated October 11, 2026.

Single Family 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.

Buying a single-family home in Key Biscayne means owning the land under it — no shared walls, no tower bylaws, and the freedom to renovate or expand within what local zoning permits. In a market shaped by a family island village between two state parks, fifteen minutes from Brickell, detached houses hold a scarcity premium that tends to carry value through the ups and downs of a cycle, because a good lot is the one thing new construction can't manufacture.

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 houses in Key Biscayne come with HOA fees?

Plenty don't. Outside gated and master-planned communities, a Key Biscayne house frequently carries no association dues at all, and where one exists the fee is usually light next to a condo's — there's no building to insure or staff. Every listing on this page shows the association cost, if any.

What should I expect for homeowners insurance on a Key Biscayne house?

Insurance is a genuine budget line in Florida, and it tracks roof age, build year and flood zone far more than sale price. A newer roof and newer-code construction quote noticeably better. We pull the insurance picture on any house you're serious about before you write an offer.

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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