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121 Knollwood Drive, Key Biscayne, FL 33149 - Photo 1
121 Knollwood Drive, Key Biscayne, FL 33149 - Photo 2
121 Knollwood Drive, Key Biscayne, FL 33149 - Photo 3
121 Knollwood Drive, Key Biscayne, FL 33149 - Photo 4
121 Knollwood Drive, Key Biscayne, FL 33149 - Photo 5
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$13,250,000

Price Reduced

121 Knollwood Drive, Key Biscayne, FL 33149

Cape Fla Sub Sec 2

Beds

5 Beds

Baths

4.5 Baths

Living Area

4,924 Sq Ft

Lot

0.32 acres

Built

1972

Days Listed

131

Dock / Boat AccessOcean AccessPoolPrice Reduced

Original Price

$13,850,000

Price Per Sq Ft

$2,691/sqft

Listed

Jan 2, 2026

Last Price Change

Feb 26, 2026

Garage

2 spaces

Property Type

Single Family Residence

Property Overview

This 5-bedroom waterfront single family residence at 121 Knollwood Drive, Key Biscayne, FL 33149 in the Cape Fla Sub Sec 2 community on 0.32 acres with 4,924 square feet of living area, built in 1972 is listed for $13,250,000. Notable MLS signals include Dock / Boat Access, Ocean Access, Pool.

MLS Public Remarks

Designed for those who value privacy, space, and a true connection to the water, this exceptional waterfront residence offers a rare boater’s retreat and a warm, inviting setting for family living. Tucked away on a quiet street and set on an expansive nearly 14,000-square-foot lot, the home impresses from the moment you arrive with its generous front yard and gated entry, offering both presence and privacy. Inside, a bright two-story layout unfolds with an open, airy feel, thoughtfully designed for both everyday comfort entertaining. The residence features five bedrooms, four full bathrooms, plus a cabana bath, all flowing seamlessly enhanced by abundant natural light and tranquil water views. Renovated in 2019, the home includes impact windows and doors, a beautifully updated kitchen and appliances, lighting throughout, gas generator, and a pool heater and chiller for year-round enjoyment. The outdoor living experience is truly exceptional…enjoy direct water access with a private dock, boat lift, and two dry jet-ski docks, allowing you to step straight from your backyard to open water and fully embrace the waterfront lifestyle. A detached, enclosed two-car garage adds versatility, while the gated property offers abundant parking for up to six vehicles, a rare and valuable amenity in Key Biscayne. Homes of this caliber which offer privacy, boating infrastructure, generous land, and modern upgrades are increasingly rare and best appreciated in person.

Key Biscayne Property Snapshot

Property Type

Residential

Sub Type

Single Family Residence

Stories

2

Total Baths

4.5

Building Area

5,775 sq ft

Lot Size

13,947 sq ft

Lot Profile

1/4 To Less Than 1/2 Acre Lot

Condition

Resale

MLS #

A11936017

Waterfront, Boating & Outdoor

Waterfront

Yes

Waterfront

Ocean Access, Canal Front, No Fixed Bridges

Dock

Yes

Boat Features

Private Dock, Lift

Private Pool

Yes

Pool Features

In Ground

View

Canal

Patio / Porch

Patio

Interior & Construction

Interior Features

Walk-In Closet(s)

Primary Bedroom

Dual Sinks, Master Bdrm - Ground, Master Bdrm - Upstairs, Separate Shower, Separate Tub

Rooms

Family Room, Laundry

Appliances

Electric Water Heater, Dryer, Disposal, Dishwasher, Electric Range, Microwave, Oven, Refrigerator, Trash Compactor, Washer

Flooring

Concrete

Construction

CBS

Heating

Electric

Cooling

Electric

Furnished

Unfurnished

Parking, HOA & Rules

Garage Spaces

2

Parking Features

Covered, Driveway, Garage Door Opener, Garage, Detached Garage, Detached

Community / Access

Fitness Center, Pool, Gated

Pets Allowed

Yes, Pet Restrictions Possible

Taxes, Utilities & MLS

Annual Taxes

$65,834

Tax Year

2024

Parcel Number

2452050110280

Zoning

2000

County

Miami-Dade

MLS Area

2520

Sewer

Public Sewer

Water Source

Public

Utilities

Cable Available

Photos

46

Listing courtesy of One Sotheby's International Realty

Listing Agent: Brigitte Nachtigall

The data relating to real estate for sale on this website comes in part from the Internet Data Exchange (IDX) program of the BeachesMLS. Real estate listings held by brokerage firms other than Levin Investments, Inc are marked with the IDX logo and detailed information about them includes the name of the listing broker. Data provided is deemed reliable but is not guaranteed. All information is subject to change and should be independently verified.

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221 Knollwood Drive, Key Biscayne, FL 33149
Price Reduced
36 photos

$11,600,000

221 Knollwood Drive, Key Biscayne, FL 33149

Cape Fla Sub Sec 2

5 Beds/5 Baths/3,509 Sq Ft/0.37 acres
Dock / Boat AccessCanal FrontPoolPrice Reduced
$3,306/sqft89 DOMBuilt 1972

Rare opportunity to own a 16,000 sq ft waterfront lot on one of Key Biscayne's most coveted cul-de-sacs. Nestled on a quiet, no-traffic street, this lovingly maintained residence offers an exceptional combination of location, lot size, and livability rarely found on the island. With 100 feet of direct water frontage and no fixed bridges to open water, the property is a boater's dream, simply step onto your private dock and cruise around the corner to Boater's Grill, The Cleat for lunch or sunset cocktails or out to the bay! The home's thoughtful positioning creates a generous setback from the water's edge, yielding a beautifully manicured backyard that is a true rarity on Key Biscayne. A mature mango tree anchors the lush landscaping, while the deep lot provides the kind of outdoor space that simply does not exist on most waterfront properties here. Inside, the home is bathed in natural light and flows effortlessly. The open kitchen connects seamlessly to the family room, creating a warm, inviting gathering space at the heart of the home. The ideal floor plan places the primary suite, with dual his-and-her bathrooms, on one wing alongside three additional bedrooms, while a separate guest suite ensures privacy for visitors. Impact windows and doors throughout. Two-car garage. Offered in excellent condition. 221 Knollwood Drive represents the best waterfront value on Key Biscayne. Opportunities of this caliber are exceptionally rare.

960 Mariner Drive, Key Biscayne, FL 33149
Price Reduced
79 photos

$19,500,000

960 Mariner Drive, Key Biscayne, FL 33149

Cape Fla Sub Sec 2

6 Beds/9 Baths/7,742 Sq Ft/0.35 acres
Dock / Boat AccessOcean AccessPoolNew Construction
$2,519/sqft497 DOMBuilt 2025

Discover unparalleled luxury at 960 Mariner Dr, Key Biscayne. This new architectural gem offers over 9,640 SF of living space, 7742 SF under air conditioning, on a 15,381 SF lot with 106 feet of water frontage. Featuring 6 bedrooms, 8 baths, and 2 half baths, the open-concept design boasts floor-to-ceiling glass, providing stunning views. A 4-person elevator connects all levels, including a third-floor terrace with 360-degree views of the water and Miami skyline. The chef’s kitchen, resort-style pool, summer kitchen, and private dock with direct Bay access make it perfect for entertaining. Boating enthusiasts will appreciate the ski boat crane. This estate combines modern elegance, privacy, and top-tier amenities in one of Miami’s most exclusive areas. Discover 960 Mariner Dr, a newly built waterfront masterpiece in Key Biscayne, expertly engineered for durability, luxury, and security. Constructed with 126 auger piles, poured concrete and rebar, and concrete slabs extending up to the third-floor terrace and roof, this bunker-like estate is built to last. The elevated first floor sits 11 feet above sea level, ensuring long-term resilience and peace of mind. A 4-person elevator provides seamless access to all levels, enhancing convenience and accessibility. VIDEO: https://youtu.be/TjzhKgnBr7oDesigned for state-of-the-art living, this smart home integrates Crestron automation, allowing seamless control of lighting, climate, security, and entertainment. The Flow by Moen water and plumbing monitoring system provides proactive leak detection, while commercial-grade electrical service with a dedicated FPL transformer ensures uninterrupted power supply. For boating enthusiasts, a Marine Guard system safeguards electric connections at the private dock, offering direct Biscayne Bay access, and a ski boat crane adds another layer of convenience for watercraft storage and launching.The resort-style outdoor oasis features an infinity-edge pool, a Pentair pool system with heater and lighting control, a pool drain well, and a fully equipped summer kitchen, perfect for waterfront entertaining. Security and convenience are prioritized with a commercial fire alarm system, CCTV surveillance, an electric car charger, and multiple indoor and outdoor storage areas.Inside, the residence boasts bespoke finishes, Italian cabinetry, and expansive living spaces bathed in natural light. The third-floor terrace provides 360-degree panoramic views of Biscayne Bay and the Downtown Miami skyline, creating an unforgettable backdrop for sunrise and sunset.With unparalleled craftsmanship, cutting-edge technology, and world-class amenities, 960 Mariner Dr is more than a home it is a fortress of modern luxury, offering the ultimate waterfront lifestyle in one of Miami’s most exclusive enclaves.