89 Mill River Road, Upper Brookville, NY 11771

$2,199,000 · 3 bed · 3 bath · 3,000 sq ft · built 2025 · MLS# 949536 · Active

Upper Brookville. Brand New Construction on 5 Serene Acres. Move Right In to this Warm & Comfortable Sun Drenched Home! State of the Art Chef's Kitchen w Top of the Line Wolf & Sub Zero Stainless Steel Appliances Throughout. Oak Wood Floors Throughout Entire 2nd Floor. Primary Suite with Brand New Bathroom w His & Her Sinks, Oversized Shower, Luxurious Free Standing Tub & Private Water Closet. 2 Walk-In Closets in Primary Bedroom. All Closets Throughout Home Have Been Outfitted with Luxurious Closet System. New Laundry Room Conveniently Located on…

Single-family homes in the Oyster Bay-East Norwich Central School District sold for a median of $1,500,000 (typically $940,000–$2,275,000) across 84 recorded sales between Oct 8, 2025 and Sep 22, 2026, up 15.8% on the 12 months before. This home's $2,199,000 list price sits in the upper single-family tier for the Oyster Bay-East Norwich Central School District.

ZIP 11771 has about 5.4 months of single family inventory — balanced market. Supply and demand are roughly even, so buyers and sellers share leverage with fair, predictable pricing.

At about $27,295 a year, this home's property tax runs roughly 44% above the $19,000 typical for Oyster Bay-East Norwich Central School District. Nassau assessments run on a multi-year cycle, so the assessed value behind this bill can lag what the home actually sells for today. A sale does not automatically reset it, and exemptions such as STAR, Senior or Veteran move the number as well — a new owner's bill is often not the same as the seller's.

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