General Info

603 Contracting is a professional general contractor based in Derry, NH, serving homeowners and businesses across Southern New Hampshire. We specialize in residential remodeling, additions, kitchen and bath upgrades, basement finishing, new home construction, and commercial tenant improvements. Known for clear communication, high-quality craftsmanship, and reliable service, our team is committed to delivering exceptional results on every project. Whether you're updating your home or building out a commercial space, 603 Contracting is your trusted local partner.