Key Biscayne waterfront homes & condos for sale

Key Biscayne feels private because it essentially is: a barrier island reached only by the Rickenbacker Causeway across Virginia Key, bounded by the Atlantic Ocean on the east and Biscayne Bay on the west. Bill Baggs Cape Florida State Park and Crandon Park bracket the island with public beaches, trails, and a marina, and the Village of Key Biscayne runs its own compact core of shops and restaurants in between.

Because the water wraps the whole island, almost all of the premium inventory is either oceanfront and bayfront condos or bay-and-ocean-access single-family estates. There is no room for new subdivisions, the land is spoken for, which is the single fact that shapes this market more than any other. What doesn't change from Broward is the diligence: dockage, depth, slip rights, elevation, and building or seawall condition come before the view.

The enclaves, condo and estate

Key Biscayne isn't one waterfront market. It splits cleanly between resort-grade condominium communities and gated single-family estate pockets, each with its own price logic:

• Ocean Club, a guard-gated oceanfront condominium community with resort amenities and direct beach frontage.
• Grand Bay / Ritz-Carlton Residences, branded bayfront luxury residences with hotel-style service on Biscayne Bay.
• Oceana Key Biscayne, a modern oceanfront tower complex known for large residences and art-forward amenities.
• Cape Florida, a prestigious single-family estate area near Bill Baggs State Park at the island's south end.
• Mashta Island, a small guarded waterfront enclave of single-family homes with deep-water dockage.
• Key Colony, a large gated condominium community mid-island with beach access and resort-style amenities.

Which one fits depends on whether you want a lock-and-leave condo or a dock in your own back yard. Tell me your priorities and budget and I'll narrow it to a real shortlist.

The scarcity is the market

Here's the honest positioning. Key Biscayne isn't an up-and-coming market and it doesn't pretend to be, it's an established, supply-constrained island village. Its draw is durable value, a self-contained family setting, and beach-and-boating access minutes from Brickell and downtown Miami across the causeway.

The buyer's real questions here aren't only about price. They're about scarcity, the causeway-island lifestyle, boating and dockage, and hurricane and insurance exposure. Those are the things I help you weigh, because on a fixed island, the property you can't easily replace is the one worth being careful about.

The Key Biscayne market right now

Here's the read, as of June, July 2026. Realtor.com showed a median list price near $2,485,000 at about $1,173 per square foot, with a median 72 days on market and a 95% sale-to-list ratio. Redfin, measuring closed sales, put the median sale price closer to $1.8M over the three months ending May 2026, and up 36.3% year over year, one of the stronger swings in Miami-Dade.

Read those two numbers together, not separately. List price reflects what sellers are asking across a range that runs from condos to bayfront estates; the Redfin sale figure reflects what actually closed. The scarcity story shows up in the year-over-year jump, not in any single headline. That's why I price a specific home against comparable water and comparable tier, oceanfront condo, bayfront estate, rather than an island-wide average that blends them.

What I check before you offer

For every Key Biscayne home you're serious about, I confirm four things before we talk price:

• Dockage and the route to open water, for an estate, the deep-water dock, depth at mean low water, and the run through Biscayne Bay to the ocean; for a condo, marina slip rights and availability.
• Elevation and storm-hardening, on a low barrier island, how high the home or building sits and how it's built to take wind and surge.
• The seawall, its age and condition on a waterfront estate; a replacement runs well into six figures and is negotiable when you catch it early.
• Flood, windstorm insurance, and, for condos, reserves, a real insurance quote inside your inspection period, plus the building's funded reserves and any special assessments before you commit.

New to the vocabulary? Start with ocean access vs. Intracoastal and the waterfront buyer's checklist.

Selling a Key Biscayne waterfront home

If you own on the water here, the marketing has to sell the scarcity, the island setting, the bay or ocean frontage, the dockage, to a genuinely international audience, not just a local one. See how I market luxury waterfront homes, with media and reach that show the right buyer exactly what an island address means, in English o en español.