The 5 Most Luxurious Condos in Key Biscayne, Ranked by Price Per Square Foot

Key Biscayne is the most secluded address in Miami's luxury market — a barrier-island village reached only by the Rickenbacker Causeway, with the open Atlantic on one side and Biscayne Bay on the other. It trades the high-rise density of the mainland for a low-slung, resort-paced island where most of the housing is single-family and the condo market is small, established, and intensely sought-after. With Crandon Park anchoring the north end and Bill Baggs Cape Florida State Park at the south, roughly two-thirds of the island is protected green space — which means oceanfront condo inventory is permanently scarce.

This guide ranks the best condos in Key Biscayne by average list price per square foot — drawn from our own live building data at the time of publishing — with our read on each building's architecture, amenities, and the buyer it fits. Because the island's condo stock is concentrated in a handful of buildings and gated communities, this is a short, curated list rather than a long one — which is exactly what makes a Key Biscayne address so hard to get.

Why Choose Key Biscayne?

Key Biscayne's appeal is privacy and nature, wrapped in resort living. The island sits just south of Downtown across the Rickenbacker Causeway, yet feels a world away — a posh, low-density community with a relaxed, South-Seas-meets-Spanish architectural character and one of the wealthiest resident bases in South Florida.

The natural setting is the headline. Crandon Park occupies the northern third of the island, with a celebrated 3.5-mile beach, a golf course, and a tennis center. At the southern tip, Bill Baggs Cape Florida State Park surrounds the historic Cape Florida Lighthouse — built in 1825, the oldest standing structure in Miami-Dade County. Between the two parks sits the Village of Key Biscayne, the Ritz-Carlton Key Biscayne resort, a walkable village center, and the island's prized oceanfront condos.

Because so much of the island is protected and the rest is largely single-family, the condo market is finite — and that scarcity, combined with the island's seclusion and beaches, keeps Key Biscayne values among the most resilient in Miami. For how it compares to Miami's other private island, see our Key Biscayne vs. Fisher Island guide.

The Quick Comparison

Browse Key Biscayne condos for sale · Key Biscayne neighborhood guide

Price-per-square-foot figures are research-based averages from our live listing data at publication, blended across towers for multi-building communities. They move with the market and with whichever residences happen to be listed — treat them as a relative gauge, not a quote.

5. Commodore Club — The Established Oceanfront Landmark

The Commodore Club is one of Key Biscayne's original oceanfront communities — three twelve-story towers at 155, 177, and 199 Ocean Lane Drive, known as Commodore Club East, West, and South, built between 1971 and 1974. Together the towers hold 550 residences in a gated, beachfront setting bordered by Crandon Park to the north and the Atlantic Ocean to the east, with direct beach access — a position that's effectively impossible to replicate on a built-out island.

What keeps the Commodore Club relevant more than five decades after construction is location and value. The towers sit directly on one of the island's best stretches of sand, steps from Crandon Park's beach, golf, and tennis, and they offer a more attainable entry point to oceanfront Key Biscayne living than the newer luxury product up the road. The floor plans are practical and well-sized, and many residences have been extensively renovated over the years, pairing original oceanfront bones with contemporary interiors.

Each of the three towers has its own heated pool, and the community shares a roster of amenities including a fitness center, men's and women's saunas, a meeting and party room, lighted tennis courts, and gated entry. It's a quieter, more residential alternative to the resort-style mega-communities — the kind of building where buyers prioritize the beach, the views, and the address over an extravagant amenity deck.

For buyers who want a genuine oceanfront Key Biscayne home at the most accessible per-foot pricing on this list, the Commodore Club remains one of the island's enduring values.

Best for: buyers who want a direct-oceanfront Key Biscayne address with classic, well-sized residences and a quieter, residential feel at the most attainable entry point.

4. Key Colony — The Island's Largest Gated Community

Key Colony is the largest condominium community on Key Biscayne — a secured, gated beachfront enclave of four independently operated villages built between 1979 and 1981, holding roughly 1,168 residences in total. The four communities are The Tidemark (Key Colony I, 1981, 282 units), The Oceansound (Key Colony II, 1979, 310 units), The Emerald Bay (Key Colony III, 1980, 285 units), and The Botanica (Key Colony IV, 1981, 291 units), set across a landscaped beachfront campus.

The scale is the point. Where Key Biscayne's newer luxury towers are boutique and tightly held, Key Colony offers the island's deepest, most liquid condo market — a genuine range of floor plans from roughly 800 to nearly 3,800 square feet across the four villages, which makes it the most practical entry into beachfront island living for a wide span of budgets. The high-rise villages (Tidemark, Oceansound, Emerald Bay) rise twelve stories with direct ocean exposures, while the low-rise Botanica offers a more intimate, garden-style alternative.

The community's amenity package is built around the beach: an Olympic-length lap pool at the center of the complex, individual heated pools for each building, an adults-only oceanfront pool, two lighted tennis courts, a fitness center, a Jacuzzi spa, and direct private beach access. Gated entry and on-site management round out a community designed for full-time island living.

Key Colony's combination of scale, beachfront position, and relative value has made it a Key Biscayne staple for more than four decades — and the place many island residents start their search.

Best for: buyers who want beachfront island living with the widest selection of floor plans and price points, inside the island's largest and most established gated community.

3. Ocean Club — The 52-Acre Resort Community

The Ocean Club is Key Biscayne's grandest gated community — a 52-acre oceanfront enclave with 1,000 feet of beach frontage along Crandon Boulevard, developed from the mid-1990s through the early 2000s. Rather than a single building, it's a master-planned community of 11 residential buildings holding roughly 800 residences, ranging from intimate beach and lake villas to full luxury high-rises: the three Club Towers, two Ocean Towers, a Lake Tower, and the Resort and Lake Villa buildings.

That breadth is the appeal — Ocean Club offers everything from a low-rise villa to a high-floor oceanfront tower residence within one guarded, amenity-rich community, which is why it commands a premium over the older island buildings. The towers feature spacious flow-through and oceanfront layouts with floor-to-ceiling glass and generous terraces, and the community's mature, lushly landscaped grounds give it a true resort sense of arrival.

The centerpiece is a 20,000-square-foot private Beach Club for residents and guests, with a bar and lounge, a dining room, a members' lounge, a card room, a business center, men's and women's spas, a beauty shop, an aerobics studio, and a fully equipped fitness center. The community fields a remarkable nine swimming pools — including the signature Grand and Beach pools — along with the 1,000-foot private beach, tennis, and 24-hour gated security.

Ocean Club is the closest thing on Key Biscayne to a self-contained luxury resort you can own into, which keeps it among the island's most coveted addresses.

Best for: buyers who want a full resort-community lifestyle — a private beach club, nine pools, and a choice of villa or tower living — behind a single guarded gate.

2. Grand Bay Residences — Ritz-Carlton-Adjacent Luxury

Grand Bay Residences is Key Biscayne's branded-luxury address — a residential-only condominium set on 12 oceanfront acres beside the Ritz-Carlton Key Biscayne at 445 Grand Bay Drive. The residences sit alongside one of Miami's premier resort hotels, giving owners proximity to Ritz-Carlton-caliber service and dining while keeping the privacy of a residential-only building (there is no hotel operation within the condominium itself).

The setting is what sets Grand Bay apart: 12 acres of tropical, beautifully landscaped grounds with direct beach access, exceptional water and nature views, and the seclusion that comes with a low-rise, lower-density layout. Residences are large and gracious, and the building's average list prices — among the highest on the island — reflect both the scale of the homes and the rarity of resale inventory in a building this tightly held.

The amenity program is genuinely resort-grade: the Cliff Drysdale Tennis Center, a 20,000-square-foot spa, a luxury fitness center, two oversized oceanfront pools flanked by two restaurants, a sophisticated social room, landscaped gardens and walking paths, a 24-hour concierge, and valet. The pairing of a private residential building with the adjacent five-star resort infrastructure is a combination no other Key Biscayne condo can match.

For buyers who want branded, service-oriented oceanfront living with the seclusion of a residential-only building, Grand Bay Residences sits at the top of the island's established luxury tier.

Best for: buyers who want resort-grade service and amenities beside a five-star hotel, with the privacy of a low-density, residential-only oceanfront building.

1. Oceana Key Biscayne — The Island's Modern Trophy

At the top of the island's market sits Oceana Key Biscayne — the only ground-up luxury condominium delivered on Key Biscayne in the modern era, and its clear per-square-foot leader. Completed in 2014 at 350 & 360 Ocean Drive, the development spans 10.3 acres with 400 feet of private Atlantic shoreline, holding 142 residences plus 12 private villas across a pair of towers designed by the acclaimed firm Arquitectonica and developed by Consultatio (the firm of Argentine developer and art collector Eduardo Costantini, also behind Oceana Bal Harbour).

The residences are built to a genuine trophy standard: two- to five-bedroom layouts with state-of-the-art kitchens, oversized balconies, floor-to-ceiling glass, private elevator foyers, and a dedicated staff room in every unit — a level of finish and service planning rare anywhere on the island. The low-rise, low-density siting on a 10-acre oceanfront parcel gives Oceana a sense of space and exclusivity that the taller, older buildings can't replicate.

The amenity program is the most complete on Key Biscayne: two pools (a recreational pool and a lap pool) plus a grand pool and an exercise pool, a private beachfront restaurant, a golf putting green, a beach volleyball court, tennis courts, a spa with a sauna and a yoga studio, an ocean-view fitness center, media and party rooms, a kids' room, full-service beach and pool service, 24/7 reception, concierge, and valet. Like its Bal Harbour sibling, Oceana also treats art as a core amenity, with museum-quality works on the grounds.

The combination of Arquitectonica architecture, a 10-acre private-beach setting, trophy finishes, and the island's deepest amenity program keeps Oceana firmly at the top of Key Biscayne — the address every other island building is measured against.

Best for: buyers who want the island's only modern trophy building — new-era finishes, a 10-acre private-beach setting, and the most complete amenity program on Key Biscayne.

Beaches, Parks & Village Life in Key Biscayne

Key Biscayne's lifestyle is built around the water and the parks:

• Crandon Park — a celebrated 3.5-mile beach plus a golf course and tennis center across the island's northern third
• Bill Baggs Cape Florida State Park — beaches, trails, and the 1825 Cape Florida Lighthouse, the oldest standing structure in Miami-Dade, at the island's southern tip
• The Village center — a walkable cluster of restaurants, cafés, and shops serving the island's residents
• The Ritz-Carlton Key Biscayne — resort dining, spa, and tennis, anchoring the island's hospitality scene

The Bottom Line

Key Biscayne is a rare, finite market — a protected, low-density island where condo inventory is limited and tightly held, and where the lifestyle (beaches, parks, seclusion, and a short causeway to Downtown) drives demand as much as any single building. Each address makes a distinct case:

• Oceana Key Biscayne for the island's only modern trophy building and deepest amenities
• Grand Bay Residences for branded, resort-grade living beside the Ritz-Carlton
• The Ocean Club for a 52-acre gated resort community with a private beach club
• Key Colony for the widest selection and the most attainable beachfront entry
• The Commodore Club for a classic, direct-oceanfront address with enduring value

Want current availability, pricing, or a private tour? Browse Key Biscayne condos for sale, explore the Key Biscayne neighborhood guide, or get in touch — island inventory is limited, and the right oceanfront residence rarely stays on the market long.