50 Cecilia Drive, Muttontown, NY 11791

$5,498,000

An Exceptional New Construction Estate in Muttontown, located within the renowned Syosset School District. 'The Diamond' sets a striking new benchmark for refined living. This exquisite 8,000-square-foot residence offers seven bedrooms, 15 rooms and a fresh, contemporary layout designed for today’s most elevated lifestyles. Meticulously envisioned, 'The Diamond' reflects an… Read More extraordinary level of craftsmanship and an aesthetic precision that blends seamlessly with classic architectural detailing. Expansive sweeping light-filled interiors create a home that is both sophisticated and welcoming. Generous ceiling heights, dramatic walls of glass, and a seamless flow between indoor and outdoor spaces define the mansion. A grand courtyard entrance leads to custom-crafted oversized iron doors that dramatically unveil a breathtaking two-story entry foyer. The formal dining room features a connoisseur’s wine center with smoky glass accents that shimmer with understated drama, and a serving buffet crowned by a sculptural hanging etagere. The grand living room is anchored by a commanding two-sided modern fireplace that offers open views of the lush 2 acre property. The bespoke chef’s kitchen serves as a true centerpiece, equipped with premium Wolf and Sub-Zero appliances, custom cabinetry, and a spacious layout ideal for both everyday living and large gatherings. A fully equipped scullery kitchen adds an additional layer of convenience and sophistication for those who entertain on a grand scale. The main level further unfolds with guest quarters, a private study, state-of-the-art media room, and a secondary staircase. Ascending to the primary suite is to enter a private world of luxury: a serene balcony overlooking the property, a spa-inspired bath, a private sitting room, and multiple expansive walk-in closets befitting the most discerning wardrobe collections. The second level continues with a spacious lounge and four additional en-suite bedrooms, each a haven of comfort and privacy. Outdoor living is equally impressive, with fully approved plans to consider upgrades for a resort-style spa pool and an open-air pavilion complete with its own kitchen creating an alfresco realm of unparalleled leisure. The 10-foot lower level also stands ready to fulfill any vision. 'The Diamond' is not merely a home, it is a residence designed for the discerning, where high-style luxury meets the ease and functionality of everyday living. Construction has commenced on this singular masterpiece. Read Less

Listing Courtesy of Daniel Gale Sothebys Intl Rlty, 516-238-7396.

Listing Snapshot

Days Online

Last Updated

Jun 8, 2026

Property Type

Single Family Residence

Beds

Full Baths

Partial Baths

Square Ft.

8,000

Year Built

2026

MLS Number

945621

30 Days Snapshot Of 11791

$1.92M

+35%

(avg) sold price

+20%

homes sold

161

+11%

(avg) days on market

Snapshot

Area Map

Additional Details

Appliances & Equipment

Description: "ENERGY STAR Qualified Appliances"

Basement

Description: "Full", "Walk-Out Access"

Building

Area: 8000, Architecture: "Mini Estate", Construction Materials: "Stone", "Stucco", Year Built: 2026, Effective Year built: 2026

Cooling

Details: "Central Air", "ENERGY STAR Qualified Equipment"

Exterior Features

Features: "Courtyard", "Juliet Balcony", "Lighting", Patio Features: "Patio", "Terrace"

Fireplaces

Total Fireplaces: 1

Floors

Flooring: "Hardwood"

Garage

Garage Spaces: 3

Heating

Heating: "ENERGY STAR Qualified Equipment", "Natural Gas", "Radiant Floor"

Laundry

Description: "Laundry Room"

Lot

Features: "Landscaped", "Level", "Private", "Sprinklers In Front", "Sprinklers In Rear", "Views", Acres: 2.0034

Parking

Parking Total: 10

Pool

Private Pool

Utilities

Sewer: "Cesspool", Water Source: "Public", Utilities: "Natural Gas Available"

Find The Perfect Home

'VIP' Listing Search

Whenever a listing hits the market that matches your criteria you will be immediately notified.

Join The List

Mortgage Calculator

Selling price

Down payment

Term (years)

Interest rate (%)

Monthly Payment

50 Cecilia Drive

'VIP' Listing Search

Schools In The Area

Similar Listings

Find My Dream Home

1. Neighborhoods

2. Home Type

3. Send