ELECTRICAL CONTRACTORS IN SALEM, NH Headquartered in Salem, NH, Cornerstone Electrical Services proudly offers all-day electrical services, outstanding professionalism, and first-rate customer service. When you partner with our electrical contractor company, here’s what you can expect: ? Expert Electricians ? Up-Front Pricing ? 24/7 Availability For professionals specializing in installations, repairs, and maintenance electrical services for your home or business, turn to Cornerstone! You can read testimonials from our satisfied customers here and more about our service level guarantee here.