Professional Custom Home Building, Project and Estate Management Services in the Hamptons, New York. Whether constructing a new home from the ground up, or simply making renovations to the home you live in, at Arch Group Building Company, we understand, that choosing a contractor may be the most important decision you will make in the foreseeable future. Arch Group Building Company has assembled the best team of home remodeling and construction professionals available to meet your needs and desires. We build each home closely collaborating with the architects, engineers and designers.The highest quality standards are achieved by hiring extremely skilled subcontractors and trusted vendors, along with hands on supervision. Value Engineering is implemented at all phases of design and construction along with a competitive bidding system during the preliminary and final budget process to control costs without impacting the aesthetics of the home.When you work with us, you’ll get the results you expect on time and on budget.