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William A. Kelly & Company is a family-owned construction management and general contracting firm based in Katonah, New York, offering a full range of custom construction services for commercial and residential buildings. With a reputation for on-time and on-budget performance, our continued commitment to quality has served clients for decades. As an authorized Nucor Building Systems builder, we design and offer custom construction that suits your unique building requirements. Our personal touch and hands-on approach ensure a positive construction experience for our clients.