523 N Midland Avenue Rare 5.3-Acre Estate in Upper Nyack – A Unique Development or Dream Home Opportunity Discover a one-of-a-kind chance to own 5.3 acres of stunning, level, park-like property in highly sought-after Upper Nyack, complete with seasonal Hudson River views. This expansive parcel features a beautiful, historic stone wall bordering the front of the property and offers subdivision potential—approved for half acre lots, making it ideal for developers or those seeking a private estate with room to grow. The existing home has undergone major foundational upgrades, including brand-new footings and underground electrical wiring, along with new electric panels already installed. Town-approved architectural plans are included and feature luxurious details such as a master suite, music room, elevator, butler’s pantry, screened-in porch. There is a detached two-car garage. Whether you're envisioning a private retreat or a development opportunity, this property combines natural beauty, valuable infrastructure, and exceptional potential—all just minutes from the river, village shops, and Nyack's vibrant lifestyle.