21st Century Development brings over 20 years of New York metropolitan area success and expertise to the Hudson Valley. With outstanding customer service and development experience, 21st Century Development builds quality housing at an affordable price. Located in Greene County, just South of Albany on the banks of the Hudson River, this picturesque part of New York is covered with miles of breathtaking unspoiled beauty, including many acres of sprawling woods, flowing creeks, rolling hills, with spectacular views of the Catskill Mountains as a backdrop.