Framing almost complete on this singular masterpiece! Ready Spring 2027 Time To Customize! 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 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.
New construction
$5,498,000
50 Cecilia Drive, Muttontown, NY 11791
7beds
8,000sqft
Single Family Residence, Residential
Built in 2026
2 Acres Lot
$-- Zestimate®
$687/sqft
$-- HOA
What's special
Expansive sweeping light-filled interiorsSpa-inspired bathFour additional en-suite bedroomsGrand courtyard entrancePrivate studyCustom-crafted oversized iron doorsSecondary staircase
- 131 days
- 754
- 25
Zillow last checked:
Listing updated:
Listed by:
Daniel Gale Sothebys Intl Rlty 516-677-0030,
Valerie A. Rosenblatt PSA 516-238-7396
Source: OneKey® MLS as distributed by MLS GRID,MLS#: 945621
Facts & features
Interior
Bedrooms & bathrooms
- Bedrooms: 7
- Bathrooms: 8
- Full bathrooms: 6
- 1/2 bathrooms: 2
Heating
- ENERGY STAR Qualified Equipment, Natural Gas, Radiant Floor
Cooling
- Central Air, ENERGY STAR Qualified Equipment
Appliances
- Included: ENERGY STAR Qualified Appliances
- Laundry: Laundry Room
Features
- First Floor Bedroom, First Floor Full Bath, Bidet, Built-in Features, Cathedral Ceiling(s), Central Vacuum, Chandelier, Chefs Kitchen, Crown Molding, Double Vanity, Eat-in Kitchen, Entertainment Cabinets, Entrance Foyer, Formal Dining, High Ceilings, His and Hers Closets, In-Law Floorplan, Kitchen Island, Open Floorplan, Pantry, Primary Bathroom, Quartz/Quartzite Counters, Recessed Lighting, Smart Thermostat, Soaking Tub, Sound System, Tray Ceiling(s), Walk-In Closet(s), Whole House Entertainment System, Wired for Sound
- Flooring: Hardwood
- Doors: ENERGY STAR Qualified Doors
- Windows: ENERGY STAR Qualified Windows, Floor to Ceiling Windows, Wall of Windows
- Basement: Full,Walk-Out Access
- Attic: Full
- Number of fireplaces: 1
- Fireplace features: Family Room, Gas
Interior area
- Total structure area: 8,000
- Total interior livable area: 8,000 sqft
Property
Parking
- Total spaces: 10
- Parking features: Driveway, Electric Vehicle Charging Station(s), Garage, Oversized, Private
- Garage spaces: 3
- Has uncovered spaces: Yes
Features
- Patio & porch: Patio, Terrace
- Exterior features: Courtyard, Juliet Balcony, Lighting
- Has private pool: Yes
Lot
- Size: 2 Acres
- Features: Landscaped, Level, Private, Sprinklers In Front, Sprinklers In Rear, Views
Details
- Parcel number: 242915A0020150
- Special conditions: None
Construction
Type & style
- Home type: SingleFamily
- Architectural style: Mini Estate
- Property subtype: Single Family Residence, Residential
Materials
- Stone, Stucco
Condition
- New Construction,To Be Built,Under Construction
- New construction: Yes
- Year built: 2026
- Major remodel year: 2026
Utilities & green energy
- Sewer: Cesspool
- Water: Public
- Utilities for property: Natural Gas Available
Community & HOA
HOA
- Has HOA: No
Location
- Region: Muttontown
Financial & listing details
- Price per square foot: $687/sqft
- Tax assessed value: $1,210,000
- Date on market: 4/21/2026
- Cumulative days on market: 131 days
- Listing agreement: Exclusive Right To Sell
Estimated market value
Not available
Estimated sales range
Not available
Not available
Price history
| Date | Event | Price |
|---|---|---|
| 4/21/2026 | Listed for sale | $5,498,000+243.6%$687/sqft |
Source: | ||
| 9/3/2024 | Sold | $1,600,000-8.6%$200/sqft |
Source: | ||
| 6/26/2024 | Pending sale | $1,750,000$219/sqft |
Source: | ||
| 5/24/2024 | Price change | $1,750,000-5.4%$219/sqft |
Source: | ||
| 4/28/2024 | Listed for sale | $1,850,000+44.5%$231/sqft |
Source: | ||
| 2/11/2021 | Sold | $1,280,000-7.2%$160/sqft |
Source: Public Record Report a problem | ||
| 9/21/2020 | Price change | $1,380,000-1.4%$173/sqft |
Source: Owner Report a problem | ||
| 8/20/2020 | Listed for sale | $1,399,000$175/sqft |
Source: Owner Report a problem | ||
Public tax history
| Year | Property taxes | Tax assessment |
|---|---|---|
| 2024 | -- | $1,210 +2.5% |
| 2023 | -- | $1,180 +2.4% |
| 2022 | -- | $1,152 |
| 2021 | $35,630 +3.6% | -- |
| 2020 | $34,395 -8.9% | $2,205 -6.6% |
| 2019 | $37,737 | $2,362 -13.9% |
| 2018 | $37,737 +4.8% | $2,743 |
| 2017 | $35,996 +6.6% | $2,743 |
| 2016 | $33,752 +616.1% | $2,743 |
| 2015 | $4,713 +6.7% | $2,743 |
| 2013 | $4,419 +6.8% | $2,743 |
| 2012 | $4,137 -82% | $2,743 -12.5% |
| 2011 | $23,015 +2.8% | $3,135 -2.1% |
| 2010 | $22,381 | $3,202 -16.4% |
| 2009 | -- | $3,832 -0.7% |
| 2008 | -- | $3,859 +6% |
| 2006 | -- | $3,641 -40.7% |
| 2005 | -- | $6,142 -42.8% |
| 2004 | -- | $10,740 |
| 2003 | -- | $10,740 -42.4% |
| 2002 | -- | $18,650 |
| 2001 | -- | $18,650 |
| 2000 | -- | $18,650 |
Find assessor info on the county website
Monthly payment
Climate risks
Neighborhood: 11791
Nearby schools
Schools provided by the listing agent
- Elementary: Robbins Lane Elementary School
- Middle: H B Thompson Middle School
- High: Syosset Senior High School
Source: OneKey® MLS as distributed by MLS GRID. This data may not be complete. We recommend contacting the local school district to confirm school assignments for this home.





