6603 GULFSIDE ROAD LONGBOAT KEY FL 34228 MLS #A4648957

6603 GULFSIDE ROAD
LONGBOAT KEY, FL, 34228
$15,000,000
5 Beds
5.5 Baths
4,925 SqFt
0.39 Acres
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MLS #A4648957 image #0
Under Construction. Just steps from the sand along Longboat Key’s prized coastline, the construction of a modern architectural showpiece is now complete and ready for living the ultimate lifestyle. Majestically poised on over a third of an acre, this modern residence’s visual presentation was intentionally and expertly planned with no detail overlooked. Expansive walls of glass take full advantage of the dramatic Gulf views that stretch across the horizon and set the stage for viewing memorable sunsets in brilliant hues of yellows, oranges and reds. The sophisticated coastal aesthetic has been cohesively designed to evoke a peaceful ambiance, captivate the senses, and create harmonious spaces that inspire and uplift. This exceptional beachfront estate offers a light-filled floor plan of 4,925 sq. ft. and provides five bedrooms, six baths, an executive office and a den. Encompassing nearly 1,000 sq. ft., the living, dining and kitchen area is simply breathtaking with walls of glass on two sides and cerulean blue water panoramas stretch as far as the eye can see. Style and comfort easily flow throughout the residence with its crisp clean lines and spacious open areas filled with natural light, balanced by organic materials and earthy neutral tones to create an open, airy ambiance. From sleek Walker Zanger porcelain tile to custom cabinetry and polished nickel fixtures, the finishes are top-tier. The kitchen façade is artistically impressive and features everything you’d expect in a home of this caliber with a large waterfall-edge island and premium Sub-Zero and Wolf appliance package including double ovens, induction cooktop, and full-size temperature-controlled wine storage. The owner’s retreat is a true showstopper with floor-to-ceiling glass sliders that open wide to a sweeping terrace perched high above the water. Inside, the suite offers a fully customized wardrobe room and a resort-inspired bath featuring tiled walls, a walk-in shower with multiple heads, a freestanding designer tub, dual floating vanities, and a private water closet. Upstairs, an executive office and three generous bedroom suites—each with its own walk-in closet—gives plenty of space for family or guests. A fourth bedroom shares a cozy den, perfect for lounging or movie nights. This incredible residence is well suited for entertaining, whether enjoying small intimate gatherings or hosting elaborate sunset soirees. The enormous ground-level outdoor space is highlighted by a 36-foot lap pool, sun shelf, heated spa, and a fully equipped summer kitchen with a grilling station. Additionally on this level are a three-car garage, an outdoor shower, and an elevator to all 3 levels plus a staircase in a glass enclosed entry. Living along the water’s edge introduces magical nuances with the dawning of every new day. The sights and sounds in one of nature’s most beautiful settings will lull you into peaceful bliss. Life on the water is truly a dream come true—a place to be cherished and appreciated for years to come.

Property Details

Price:
$15,000,000
MLS #:
A4648957
Status:
Active
Beds:
5
Baths:
5.5
Type:
Single Family
Subtype:
Single Family Residence
Subdivision:
SLEEPY LAGOON
Neighborhood:
34228longboatkey
Listed Date:
Apr 17, 2025
Finished Sq Ft:
4,925
Total Sq Ft:
6,225
Lot Size:
16,893 sqft / 0.39 acres (approx)
Year Built:
2026
WaterfrontPoolNewconstruction34228 – Longboat Key34228longboatkeySleepy LagoonNone1 Month

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Schools

Interior

Appliances
Built-In Oven, Convection Oven, Dishwasher, Disposal, Electric Water Heater
Bathrooms
5 Full Bathrooms, 1 Half Bathroom
Cooling
Central Air
Flooring
Ceramic Tile
Heating
Central
Interior Features
Ceiling Fan(s), Eating Space In Kitchen
Laundry Features
Laundry Room
Levels
One

Exterior

Attached Garage YN
1
Construction Materials
Block, Metal Frame
Covered Spaces
3
Direction Faces
West
Exterior Features
Balcony
Garage Spaces
3
New Construction YN
1
Roof
Other
Spa Features
Heated, In Ground
Waterfront Features
Beach, Gulf/Ocean

Financial

Tax Year
2024
Taxes
$44,748

Map

Community

Subdivisions in LONGBOAT KEY

Market Summary

Current real estate data for Single Family in LONGBOAT KEY as of Aug 10, 2026
132
Single Family Listed
204
Avg DOM
1,004
Avg $ / SqFt
$2,955,100
Avg List Price

Property Summary

    Located in the SLEEPY LAGOON subdivision, 6603 GULFSIDE ROAD LONGBOAT KEY FL is a Single Family for sale in LONGBOAT KEY, FL, 34228. It is listed for $15,000,000 and features 5 beds, 6 baths, and has approximately 4,925 square feet of living space, and was originally constructed in 2026. The current price per square foot is $3,046. The average price per square foot for Single Family listings in LONGBOAT KEY is $1,004. The average listing price for Single Family in LONGBOAT KEY is $2,955,100. To schedule a showing of MLS#a4648957 at 6603 GULFSIDE ROAD in LONGBOAT KEY, FL, contact your CENTURY 21 Carioti agent at 800-783-8847.

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6603 GULFSIDE ROAD
LONGBOAT KEY, FL