DockOnly™

The only MLS search built exclusively for boaters. Find your dock home.

Company

  • About
  • Contact
  • Blog

Search

  • By City
  • By County
  • Dockominiums

Services

  • Marine Services
  • Dock Builders
  • Find Contractors

For Agents

  • Become a Partner
  • Referral Program
  • Featured Listings

Legal

  • Privacy Policy
  • Terms of Use
  • MLS Compliance

© 2026 DockOnly™. All rights reserved.

DockOnly™ and Dock Score™ are trademarks of Blue Mar Real Estate Group Inc.

Blue Mar Real Estate Group

Blue Mar Real Estate Group Inc.

Licensed Florida Real Estate Broker

DBPR License CQ1018554

Listing data provided by Miami Realtors MLS via Bridge Data Output. Information deemed reliable but not guaranteed. Dock Score™ is a DockOnly.com rating and is not provided by or affiliated with the MLS or listing broker. NOAA chart data is public domain and for reference only — not for navigation. Full MLS Compliance

Equal Housing OpportunityEqual Housing Opportunity

© 2026 Miami Association of REALTORS®. IDX information provided exclusively for personal, non-commercial use. Listing data last updated every 30 minutes.

This website complies with the Fair Housing Act. We do not discriminate on the basis of race, color, religion, sex, national origin, familial status, or disability.

DockOnly™
SearchMarketsDockominiums
SearchMarketsDockominiumsSaved
Real Estate Agents
Home
SearchSaved
550 Harbor Dr photo 1
550 Harbor Dr photo 2
550 Harbor Dr photo 3
550 Harbor Dr photo 4
550 Harbor Dr photo 5
550 Harbor Dr photo 6
550 Harbor Dr photo 7
550 Harbor Dr photo 8
550 Harbor Dr photo 9
550 Harbor Dr photo 10
550 Harbor Dr photo 11
550 Harbor Dr photo 12
550 Harbor Dr photo 13
550 Harbor Dr photo 14
550 Harbor Dr photo 15
550 Harbor Dr photo 16
550 Harbor Dr photo 17
550 Harbor Dr photo 18
550 Harbor Dr photo 19
550 Harbor Dr photo 20
550 Harbor Dr photo 21
550 Harbor Dr photo 22
550 Harbor Dr photo 23
550 Harbor Dr photo 24
550 Harbor Dr photo 25
1 / 25
550 Harbor Dr
25 photos
550 Harbor Dr photo 2
550 Harbor Dr photo 3
550 Harbor Dr photo 4
550 Harbor Dr photo 5
+20

550 Harbor Dr

Key Biscayne, FL, 33149

Active

$20,450,000

550 Harbor Dr

Key Biscayne, FL, 33149

Active

$20,450,000

7

Bedrooms

8

Bathrooms

6,497 sqft

Living Area

2003

Year Built

Mortgage Calculator

Estimate your monthly payment for this waterfront property

20%

$4,090,000 down

%
Principal & Interest$106,111/mo
Property Tax (est. ~1.2%, varies by county)$20,450/mo
Home Insurance (est.)$250/mo
Total Monthly Payment$126,811
Loan Amount: $16,360,000Rate: 6.75%
Get Pre-Qualified

Estimated payments only. Actual rates and terms may vary.

Comparable Sales

$20,450,000Tour the dockSchedule a Showing
Navigation note: Navigation routes show the shortest mapped path to open water. A vessel taller than the binding bridge clearance may still reach open water via a longer alternate route that we don't currently map — verify navigability with a local captain or surveyor before relying on it.

22,975

Lot Size (sqft)

215

Days on Market

Dock Score™

DockOnly
71
Good

What shaped this score

✓Ocean Access
✓Dock present
✓No fixed bridges
✓Fits boats up to ~30ft (est.)

DockOnly.com rating — not provided by the MLS or listing broker.

Dock & Water AccessMLS

Ocean AccessLagoonNavigable WaterNo Fixed Bridges

AI Aerial Imagery Detection

Dock DetectedSeawall DetectedDeep Water Indicators

Detected by AI from open-source aerial mapping imagery and may not reflect current conditions. This information was not provided by the MLS or listing broker. Always verify dock infrastructure with the listing agent.

Canal WidthDockOnly

At the dock

County parcel data
349ft
dock349 ft349.1342348

Width sampled every 10 ft from dock · perpendicular measurement

Measured perpendicular from this parcel's waterfront edge to the parcel directly across the canal, using surveyed county GIS boundaries. Multiple waterfront edges detected (corner lot or dual frontage); reported value is the widest — verify with the listing agent.

Will it turn around?

Up to 154 ft

Easy
handling

154–206 ft

Fits
with care

206–237 ft

Tight
(back-in)

Boats over 237 ft can't turn around here — back in/out only. Clear channel ≈ 309 ft once boats are docked both sides (FL rules cap each side ~20 ft). Wide-beam yachts need the upper end of each range.

Navigation RouteDockOnly

Data sources: SFWMD AHED waterway polygons · FHWA National Bridge Inventory 2024 · Not provided by the MLS or listing broker.

Description

Situated on the exclusive island of Key Biscayne, this extraordinary 7,000sqft waterfront estate sits on a rare double lot located on Hurricane Harbor overlooking tranquil Manatee Lagoon. The property offers an unparalleled sanctuary of luxury and seclusion with features including a 4 car garage ideal for collectors, professionally landscaped yard well suited for outdoor entertaining, 7 bedrooms and 7.5 baths including live-in quarters. Expansive living areas flow seamlessly to large outdoor, covered porches becoming your al fresco living room for outdoor dining or relaxing and soaking in the beauty of the natural environment. As the sun hits the horizon, Sunsets light up the sky illuminating the clouds in a breathtaking array of tropical colors. Text listing agent. 24hr notice

Schedule a Showing

See the property and tour the dock. A licensed waterfront specialist will arrange your private showing.

Select a date

Location

Key Biscayne, FL, 33149

No price history available for this property.

Listing courtesy of Three Bridges Realty, LLC

Last updated: 6/23/2026

© 2026 Miami Association of REALTORS®, Inc. All rights reserved. The data relating to real estate for sale on this website comes in part from the Internet Data Exchange program of the Miami Association of REALTORS®. Information is deemed reliable but not guaranteed. All properties are subject to prior sale, change, or withdrawal.

IDX information is provided exclusively for consumers' personal, non-commercial use. It may not be used for any purpose other than to identify prospective properties consumers may be interested in purchasing.

Dock Score™

DockOnly
71
Good

What shaped this score

✓Ocean Access
✓Dock present
✓No fixed bridges
✓Fits boats up to ~30ft (est.)

DockOnly.com rating — not provided by the MLS or listing broker.

FEMA Flood Zone AE
BFE: 10ft

Special Flood Hazard Area

View FEMA Flood Map →
Loading nearby marinas…
Loading nearby sandbars…

Similar Listings

16479 NE 30th Ave$20.5M

16479 NE 30th Ave

North Miami Beach, FL

5 6 7,843 sqft

Listed by Avanti Way Realty LLC

9360 Balada St$22.9M

9360 Balada St

Coral Gables, FL

8 9 6,771 sqft

Listed by Compass Florida, LLC

535 N Shore Dr$15.8M

535 N Shore Dr

Miami Beach, FL

5 7 5,094 sqft

Listed by GuildStone Group LLC

30 Leucadendra Dr$17.5M

30 Leucadendra Dr

Coral Gables, FL

5 6 6,738 sqft

Listed by Sea Grove Realty

288 S Coconut Ln$23.0M

288 S Coconut Ln

Miami Beach, FL

8 10 9,094 sqft

Listed by Douglas Elliman

7115 NE 10th Ave$18.7M

7115 NE 10th Ave

Miami, FL

6 7 7,392 sqft

Listed by Compass Florida, LLC

Swipe or use arrows to see more

Nearby Schools

Assigned Public Schools

E

Key Biscayne K-8 Center

Grades PK-8 · Key Biscayne

M

Ponce de Leon MS

Grades 6-8 · Coral Gables

H

Coral Gables Senior High

Grades 9-12 · Coral Gables

Nearby Private Schools

St Agnes Academy0.8 mi
St Christophers - By-The-Sea Montessori School0.8 mi

School data from Miami-Dade County Open Data Hub. Verify attendance zones with the school district.