50 Cecilia Drive, Muttontown, NY 11791

50 Cecilia Drive, Muttontown, NY 11791

$5,498,000 · 7 bed · 8 bath · 8,000 sq ft · built 2026 · MLS# 945621 · Active

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…

Single-family homes in the Syosset Central School District sold for a median of $1,315,000 (typically $1,050,000–$1,760,000) across 259 recorded sales between Oct 6, 2025 and Oct 2, 2026, up 7.7% on the 12 months before. This home's $5,498,000 list price sits in the luxury single-family tier for the Syosset Central School District.

ZIP 11791 has about 3.7 months of single family inventory — seller's market. Demand is outpacing supply, so homes sell quickly with firm pricing and limited room to negotiate.

OneKey MLS (recorded LI sales, trailing 12mo) + actual tax

Listings courtesy of OneKey® MLS as distributed by MLS GRID.

Based on information submitted to the MLS GRID as of October 11, 2026 3:30 am. All data is obtained from various sources and may not have been verified by broker or MLS GRID. Supplied Open House Information is subject to change without notice. All information should be independently reviewed and verified for accuracy. Properties may or may not be listed by the office/agent presenting the information.

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Muttontown Market Trend

Muttontown has tightened over the past 2 years: the median sale price has advanced roughly 13% year over year to near $1.31M, and sales have generally been closing faster. That combination points to conditions favoring sellers — and if it continues, further firming is possible.

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Looking for off-market opportunities or a property attorney's read on this listing? Contact Joseph DeVito — Lic. R.E. Associate Broker + NY-licensed real estate attorney.