Key Biscayne Real Estate | Key Biscayne 4 Bedroom Properties for Sale

4 Beds ⋅ 3 Baths ⋅ A12076783 MLS ⋅ Mashta Island A Replat Of BLDG.

Enjoy your own paradise in the paradise—an exceptional, move-in-ready residence on prestigious Mashta Island, one of Key Biscayne's most exclusive and tranquil enclaves. Beautifully remodeled and designed for relaxed yet sophisticated island living, this home offers exceptional indoor and outdoor spaces to enjoy with family and friends. Outdoor living takes center stage with a heated pool and spectacular covered entertainment area featuring a custom BBQ, grill, sink, granite counters and seating for up to 12 guests—the perfect setting for weekend gatherings, celebrations and year-round enjoyment of the Key Biscayne lifestyle. Bright, inviting interiors feature a spacious open layout that seamlessly connects the living, dining and kitchen areas. The impressive chef's kitchen is equipped with premium Viking appliances, generous cooking island and abundant granite counter space. Marble flooring enhances the main living areas, while warm wood floors add character to the private bedroom spaces. The primary suite opens directly to the pool area and features a large walk-in closet and a luxurious bath with steam shower. The property is on a 10,000 SF lot with an ample circular driveway, covered garage for two vehicles and a large additional side parking.

571 S Mashta Dr, Key Biscayne

$14,990,000

4 Beds ⋅ 6 Baths ⋅ A12051668 MLS ⋅ Cape Florida Sub Sec 3 BLDG.

Best-priced waterfront residence on Key Biscayne, offering an exceptional 100 feet of water frontage and a true boater's paradise. Tucked away on one of Paradise Island's most private and exclusive streets, this extraordinary residence is where contemporary design meets the serenity and exclusivity of life on the water. Thoughtfully and completely remodeled, including a brand-new roof, the home is bathed in natural light, enhanced by soaring ceilings, and showcases a sophisticated open-concept floor plan designed for both effortless everyday living and exceptional entertaining. Expansive social spaces flow seamlessly to a spectacular outdoor oasis featuring a resort-style pool, generous sun-drenched terraces, and a fully equipped summer kitchen…creating the perfect backdrop for unforgettable gatherings. Designed with both luxury and versatility in mind, the residence offers four spacious ensuite bedrooms, four full bathrooms, a powder room, and a cabana bath. A private office and a dedicated gym provide exceptional flexibility and can easily be transformed into a fifth bedroom, guest suite, media room, or additional living space to suit your family's lifestyle. Situated on a wonderful 14,500 SF lot, this remarkable property offers an extraordinary sense of privacy. Modern, refined, and impeccably appointed, this is more than just a home…it is a private waterfront sanctuary where timeless architecture, elegant interiors, and the beauty of island living come together as one.

161 Cape Florida Drive, Key Biscayne

$18,500,000

4 Beds ⋅ B26058354 MLS

BRING ALL OFFERS! Exceptional waterfront opportunity in prestigious Key Biscayne. Set on a 15,000 sq. ft. lot with 100 feet of water frontage, this residence offers open-water views, direct Biscayne Bay access, and no fixed bridges to the ocean. Currently undergoing a complete renovation, it will feature modern finishes, impact windows and doors, new systems, spacious living areas, a chef's kitchen, and luxurious bathrooms. Enjoy a private dock, deep-water access, pool, breathtaking sunsets, and an unmatched boating lifestyle in one of South Florida's most desirable communities One of the most compelling waterfront opportunities currently available in all of Key Biscayne. Perfectly positioned on the exclusive and highly coveted Mashta Island, this exceptional property offers approximately 100 feet of prime waterfront, deep-water dockage, direct Biscayne Bay access, and no fixed bridges to the Atlantic Ocean, creating an unparalleled opportunity for boating enthusiasts and yacht owners. Mashta Island has long been recognized as one of South Florida's most prestigious residential enclaves, offering exceptional privacy, quiet tree-lined streets, oversized waterfront estates, and immediate access to the open waters of Biscayne Bay while remaining only minutes from Brickell, Downtown Miami, Coconut Grove, Coral Gables, Miami Beach, and Miami International Airport. Very few neighborhoods offer this combination of island living, security, boating lifestyle, and proximity to the city's financial and cultural centers. The residence is currently on renovation designed to transform the property into a contemporary waterfront estate while preserving the exceptional value of its location and oversized waterfront parcel. This is substantially more than a cosmetic renovation. The project includes major improvements throughout the residence, including redesigned living spaces, upgraded electrical and plumbing systems, new HVAC equipment, impact-resistant windows and doors, premium flooring, modern architectural lighting, designer finishes, and a completely reimagined interior intended to meet today's luxury lifestyle expectations. Upon completion, the home is anticipated to offer spacious entertaining areas, beautifully appointed bedroom suites, bathrooms, an impressive chef's kitchen featuring custom cabinetry, premium appliances, elegant countertops, and thoughtfully designed indoor-outdoor living spaces that maximize the spectacular waterfront setting. The property's exceptional orientation provides beautiful water views and unforgettable sunsets while creating an ideal environment for entertaining, family gatherings, and year-round outdoor living. The expansive backyard offers generous space surrounding the swimming pool together with multiple areas for outdoor dining, lounging, and enjoying the waterfront lifestyle that has made Key Biscayne one of the most desirable residential communities in South Florida. For boating enthusiasts, few properties can offer the combination of oversized waterfront, private dockage, deep-water access, and unrestricted navigation to Biscayne Bay and the Atlantic Ocean without fixed bridges. Whether accommodating a large sport yacht, cruising yacht, center console, or multiple vessels, the waterfront configuration provides flexibility rarely available in today's market. Key Biscayne continues to be recognized as one of South Florida's most exclusive island communities, celebrated for its pristine beaches, excellent schools, private clubs, marinas, tennis facilities, parks, bicycle paths, restaurants, and relaxed coastal lifestyle. Residents enjoy the unique advantage of living within a peaceful island environment while remaining only a short drive from Miami's world-class shopping, fine dining, cultural institutions, private airports, international business centers, and professional sports venues. The supply of premium waterfront homes on Mashta Island remains extremely limited due to the neighborhood's established character and finite number of waterfront parcels. As a result, opportunities to acquire large waterfront lots with substantial dockage and direct ocean access continue to be highly sought after by both domestic and international buyers. The combination of location, waterfront dimensions, boating accessibility, oversized lot, and comprehensive renovation creates a property with exceptional long-term appeal. Showings are strictly by appointment with the Listing Agent.. All measurements, dimensions, lot size, square footage, waterfront frontage, dock dimensions, room sizes, zoning, taxes, permits, specifications, plans, renderings, and property information are believed to be accurate but are not guaranteed and should be independently verified by Buyer. Renderings, conceptual plans, floor plans, specifications, and construction updates are available upon request when applicable. This offering represents an extraordinary opportunity to secure one of Key Biscayne's waterfront residences . Whether as a primary residence, seasonal retreat, or long-term investment, this property combines one of South Florida's most desirable locations with an outstanding boating lifestyle and exceptional future value. Bring All Offers.

631 N Mashta Drive, Key Biscayne

$3,750,000

4 Beds ⋅ 4 Baths ⋅ A12049547 MLS ⋅ Island House BLDG.

Owner says sell. Wake up to the sound of the waves and endless horizon views in this breathtaking direct oceanfront Key Biscayne sanctuary. Located in the highly sought-after Island House, this rare 3-bedroom-plus-den, 4-bath home spans nearly 2,400 square feet of seamless, open-concept design. Every room is kissed by natural light, with floor-to-ceiling windows that serve as a living canvas of the Atlantic. Pour a glass of wine and step onto your private balcony to watch the sunset, or take the elevator directly down to your quiet, pristine beach. Complete with a heated oceanfront pool, fitness center, elegant secure lobby, and covered parking, this is more than a home — it is a daily vacation.

200 Ocean Lane Dr Unit #501, Key Biscayne

$6,900,000

4 Beds ⋅ 5 Baths ⋅ A12027392 MLS ⋅ Ocean Club BLDG.

One of the rarest opportunities within Ocean Club Key Biscayne, this expansive renovated two-level 4,200 SF lanai residence combines the privacy and scale of a single-family home with the effortless luxury, security, and world-class amenities of a premier oceanfront condominium, all within a 52-acre private beachfront enclave. A private elevator opens directly into a bright and sophisticated first floor designed for both grand entertaining and refined everyday living. Multiple living areas, formal and informal dining spaces, an eat-in chef’s kitchen, powder room, and a first-floor guest suite are thoughtfully arranged to create a seamless flow throughout. Four oversized terraces blur the line between indoor and outdoor living, highlighted by a spectacular garden terrace that lives like a private backyard, offering direct access to the pool deck and beach beyond. The upper level is anchored by an expansive primary suite occupying its own private wing, creating a true retreat. Two additional bedroom suites, a generous family room, and a dedicated laundry room complete the second floor. Offered with private elevator entry and three parking spaces, residents enjoy access to Ocean Club’s unrivaled collection of amenities, including beachfront service, valet, fine dining, spa and wellness facilities, fitness center, tennis and padel courts, children's playground, and 24-hour gated security. Special assessment has been paid in full.

785 Crandon Blvd Unit #205/305, Key Biscayne

$2,600,000

4 Beds ⋅ 4 Baths ⋅ A12019812 MLS ⋅ Gdns Of Key Biscayne BLDG.

Unique opportunity to own this extraordinary 4-bedroom plus den townhouse offering the lifestyle and comfort of a single-family home. Stunning and spacious living areas feature soaring high ceilings and expansive windows that fill the residence with natural light and showcase beautiful views of the lush landscaping. The spacious bedrooms, including two en-suite bedrooms, are thoughtfully located on the upper levels offering privacy from the main living and entertainment areas. The well-designed kitchen opens to an adjoining family room/den, which can easily be enclosed to create a separate living space, office... Outdoor living is a true highlight, featuring a beautifully landscaped patio that creates a private oasis perfect for relaxing or entertaining. In addition, the residence offers a spectacular rooftop terrace with beautiful city and island views, ideal for enjoying breathtaking sunsets. Two car garage with additional storage space!! Ideally located just half a block from the beach and minutes from the beach, restaurants, shops, schools and all the best of island living.

209 E Enid Dr Unit #36, Key Biscayne

$3,550,000

4 Beds ⋅ 3 Baths ⋅ A12002746 MLS ⋅ Tropical Isle Homes Sub 4 BLDG.

A beautifully remodeled residence offering a refined blend of style, comfort, and seamless indoor-outdoor living. Recently upgraded with impact windows and doors installed in February with warranty, the light-filled interiors showcase travertine flooring, fresh paint, and updated lighting throughout. The renovated kitchen features stainless steel appliances, a wine cooler, and flows effortlessly into expansive living spaces, including a formal living room and a spacious dining and family area overlooking the pool and garden. A thoughtful split floor plan enhances privacy, highlighted by a generous primary suite with a custom walk-in closet and direct pool access, along with a secondary bedroom featuring its own bath and pool entry. Additional improvements include updated bathrooms, new AC ductwork with linear vents, an upgraded electrical panel, and a tankless water heater. Outdoors, a palm-lined yard surrounds the pool within fully fenced grounds with dual aluminum gates. A new aluminum roof installed in September 2024, two AC systems, sprinkler system, and ample parking complete this well-appointed home.

255 Ridgewood Rd, Key Biscayne

$5,478,000

4 Beds ⋅ 4 Baths ⋅ A12010108 MLS ⋅ Biscayne Key Estates BLDG.

A truly exceptional Miami Modern Tropical residence set on a prime 8,010 SF corner lot, offering 3,549 SF of beautifully curated living space with 4 bedrooms and 3.5 bathrooms. Designed by architect Hervin Romney, a founding member of Arquitectonica, the home reflects a distinctive architectural vision inspired by the organic principles of Frank Lloyd Wright and the expressive forms of Antoni Gaudí, where art, design, and nature seamlessly converge. This residence captivates with its abundance of natural light, soaring high ceilings, fluid open spaces, and harmonious lines that create a sense of warmth, sophistication, and effortless flow throughout the main living areas. The beautifully remodeled kitchen and bar are a true centerpiece, featuring high-end appliances, premium finishes, refined craftsmanship, and a design that balances functionality with striking aesthetics. Step outside into your own private tropical retreat, where lush landscaping, graceful curved terraces, and a stunning swimming pool create an atmosphere of tranquility and escape. This outdoor sanctuary is perfect for both relaxation and entertaining. As an added privilege, the property includes membership to the Key Biscayne Beach Club, offering exclusive access to one of Miami’s most coveted coastal lifestyles. Key Biscayne is renowned for its pristine beaches, charming restaurants, and vibrant yet relaxed atmosphere—delivering a true island lifestyle just minutes from the city.

690 Warren Ln, Key Biscayne

$5,100,000

4 Beds ⋅ 6 Baths ⋅ A11996672 MLS ⋅ Tidemark BLDG.

Exceptionally rare beachfront, standalone, townhouse in Key Colony, Key Biscayne. One of the few Miami-Dade properties with direct beach access. Spanning over 3,200 sqft, this 4-bed, 6-bath gem offers an unparalleled island lifestyle. Highlights include a private ground-floor cabana with new AC, impact windows & doors, a private elevator for easy access across its four levels, & Subzero paneled refrigerators. The rooftop terrace, complete with an outdoor wet bar, is perfect for enjoying sunset. With 6 parking spaces, including 2 in a private garage, providing added privacy & security. Located in the prestigious Key Colony, enjoy resort-style lifestyle with multiple pools, 12 tennis courts, a fitness center, & a spa. On-site amenities include a gourmet market, beach bar, & 24-hour security.

201 Crandon Blvd Unit #174, Key Biscayne

$16,800,000

4 Beds ⋅ 4 Baths ⋅ A11990382 MLS ⋅ Mashta Island BLDG.

Welcome to your own slice of paradise! Enjoy breathtaking sunsets from your private dock on this waterfront property boasting 100 feet of direct Biscayne Bay frontage. Ideally located on Mashta Island. Set on a 15,000 SF lot, the home features 5 beds, 5 baths, including 2 bayfront primary suites with stunning views, impact windows and doors throughout. The open-concept layout flows seamlessly from the living and dining areas to the modern kitchen and out to the pool and entertainment patio, with floor-to-ceiling glass doors that open to blend indoor and outdoor living. Tranquil guest suite upstairs offering privacy and views. It also features an oversized 2-car garage, covered parking, and a spacious driveway for guests. Perfect to move in, renovate, or build your dream waterfront estate

640 S Mashta Dr, Key Biscayne

$4,500,000

4 Beds ⋅ 4 Baths ⋅ A11970482 MLS ⋅ Commodore Club South BLDG.

Expansive 4-bedroom, 3.5-bathroom residence combining Units 401 and 403, offering 2,825 sq ft of beautifully remodeled living space. This bright and airy home features spacious open-concept living and dining areas, elegant tile flooring throughout, and floor-to-ceiling windows showcasing stunning ocean views. A wraparound balcony extends from the main living areas, creating seamless indoor-outdoor living, perfect for relaxing or entertaining. The thoughtfully designed layout offers both privacy and functionality, ideal for those seeking generous oceanfront living. Includes two assigned parking spaces. The building offers direct beach access, 24-hour security and concierge services, a social room, and high-speed Wi-Fi throughout all common areas. Residents enjoy a heated swimming pool (one per building), three lighted tennis courts, a fully equipped fitness center with sauna, car wash area, and full beach service.

199 Ocean Lane Dr Unit #401, Key Biscayne

$11,495,000

4 Beds ⋅ 6 Baths ⋅ A11958326 MLS ⋅ Oceana Key Biscayne BLDG.

Extensively renovated and move-in ready 4-bedroom, 5.5-bath corner beachfront residence at Oceana Key Biscayne, offering refined architecture, thoughtful detailing, and seamless indoor-outdoor living. Floor-to-ceiling glass fills the home with natural light and frames ocean, bay, and village views enjoyed from every room and the wrap-around terraces. Architectural elements include shadow reveal wall details, layered architectural lighting and Res Italia custom doors. Custom millwork is carried throughout, with Giellesse Italian closet systems and shelving as well as Casabath Italian bathroom cabinetry. The primary suite offers sweeping ocean views, a spa-like bath with soaking tub overlooking the ocean, and two full primary bathrooms with walk-in showers. Three additional bedrooms enjoy beautiful and completely private views overlooking Biscayne Bay and the Village of Key Biscayne. The kitchen features Binova Italian cabinetry, Miele appliances, an oversized waterfall island, and a separate walk-in pantry with wine storage. The home is equipped with Savant and Lutron smart home systems with automated lighting, climate control, audio/video and blinds on every door and window. Unit has 4 parking spaces and 2 storage units. Oceana Key Biscayne provides world-class amenities including 24-hour concierge, beachfront fitness center and spa, 500ft of beach, oceanfront restaurant, tennis court, putting green, media room/cinema, valet, golf cart parking, and more.

350 Ocean Dr Unit #701N, Key Biscayne

$19,800,000

4 Beds ⋅ 9 Baths ⋅ A11934196 MLS ⋅ Cape Florida Sub Sec 3 BLDG.

Enjoying an exceptional 270ft of L-shaped water frontage facing 185-ft-wide Pines Canal and the natural beauty of Bill Baggs Cape Florida State Park, this elegant island-coastal estate is tailored to a boating lifestyle. Offering calm and naturally sheltered harbor, concrete seawall, boat lift, dockside kitchen and side-dock boat storage that preserves unobstructed water views, the property provides a sense of openness, privacy, and tranquility. Clean architectural lines, an internal garden courtyard, and generous covered terraces fill the residence with natural light and create a seamless connection to the surrounding water and landscape. This elevated home offers 4 bedrooms plus staff quarters, 5 bathrooms, and 4 half-baths within 8,240 sqft of living space on a 16,500-sqft lot. Architectural tray ceilings, refined millwork, custom wall paneling, and thoughtfully designed built-ins with abundant storage add depth and craftsmanship while maintaining a light, contemporary coastal aesthetic. Formal living and dining rooms with elegant millwork provide an ideal setting for entertaining. The kitchen is appointed with Calacatta Gold marble countertops, gas cooking, Sub-Zero and Viking appliances, and a butler’s pantry. Additional highlights include 2 family rooms, fitness center with water views, 2 garages accommodating 7+ cars/golf carts, temperature-controlled wine cellar for 1,400+ bottles, elevator, retractable screen doors, generator and saltwater heated pool.

100 Cape Florida Dr, Key Biscayne

$8,950,000

4 Beds ⋅ 7 Baths ⋅ A11911813 MLS ⋅ Oceana Key Biscayne BLDG.

Stunning Corner Residence at Oceana Key Biscayne Beautiful, light-filled 4-bedroom residence with staff quarters and 6.5 bathrooms, ideally situated in the exclusive Oceana Key Biscayne. This exceptional corner home features marble and wood flooring, custom-built closets in every bedroom, motorized blinds with sheer window treatments, and expansive wraparound terraces showcasing breathtaking ocean views. Oceana Key Biscayne offers world-class amenities, including direct beach access, resort-style pools, a state-of-the-art fitness center, spa, tennis courts, an on-site restaurant, concierge services, and 24-hour security. The residence is now vacant, ready for its new owner, and easy to show. A true island sanctuary offering the finest in luxury beachfront living.

350 E Ocean Dr Unit #301N, Key Biscayne

$25,900,000

4 Beds ⋅ 4 Baths ⋅ A11869417 MLS ⋅ Tropical Isle Homes Sub 4 BLDG.

Key Biscayne Waterfront – Unbeatable Location. Experience Miami’s skyline views from your private saltwater pool and man-made beach. This elegant four-bedroom residence features marble floors, impact-glass windows, and a modern open kitchen filled with natural light. Enjoy two electric boat slips, direct water access for kayaking or paddleboarding, and a spacious two-car garage. Currently leased until December 1, 2025.

200 Harbor Dr, Key Biscayne

$3,800,000

4 Beds ⋅ 4 Baths ⋅ A11856342 MLS ⋅ Biscayne Key Estates BLDG.

Don’t miss this unique opportunity to own a stunning oversized corner lot spanning 8,367SF! This beautifully remodeled home boasts a brand-new roof and appliances, ensuring modern comfort and peace of mind. Step inside to soaring high ceilings and a spacious open floor plan, highlighted by elegant wood floors throughout. The gourmet open kitchen is a true showstopper, perfect for cooking and entertaining in style. Designed for those who love the island lifestyle, this home offers expansive living spaces, a gorgeous pool area, and inviting outdoor areas perfect for entertaining or simply unwinding in paradise.

691 Ridgewood Rd, Key Biscayne

$5,450,000

4 Beds ⋅ 5 Baths ⋅ A11744888 MLS ⋅ The Ocean Club BLDG.

DIRECT OCEAN, BAY, SUNSET & MIAMI SKYLINE VIEWS from this rare two-level residence at The Ocean Club. Offering approx. 4,200 SF, the layout features 4 bedrooms and 5 baths, plus a spacious living room, family room, and four oversized terraces designed for effortless indoor-outdoor living. The 7th floor includes the living/dining area, kitchen, and a guest bedroom, while the 8th floor offers three additional bedrooms, three baths, and a second family room—ideal for privacy and flexible use. Marble floors, a full-service lobby, guard-gated security, deeded beach access, four assigned covered parking spaces #746, #560, #558, #647 and two storage bins complete the offering.

785 Crandon Blvd Unit #705/805, Key Biscayne

Key Biscayne 4 Bedroom Properties for Sale

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