Call us now and we'll work to schedule a technician the same day, across every trade we handle.
Book A ServiceCommercial Electrical Services in Salem, NH
Trusted Commercial Electrical Solutions Across Southern NH & Northern MA
Cornerstone Services is a licensed and insured commercial electrical contractor serving businesses in Salem, NH and throughout southern New Hampshire and northern Massachusetts. More than 1,250 five-star reviews across Google, HomeAdvisor, Facebook, and Yelp reflect the standard we hold ourselves to on every job.
Every commercial electrical job we complete is priced per job, not per hour. The number we quote is the number you pay at completion, with no adjustments and no hidden fees. Every completed job is also backed by a signed workmanship warranty under our quality assurance policy, giving you documented protection on our work.
Our technicians provide fast, precise electrical solutions throughout the following communities:
- Rockingham County, NH
- Hillsborough County, NH
- Essex County, MA
Our commercial electricians know how urgent electrical problems can be and how specific your operating requirements are. We serve a wide range of professional settings, including:
- Retail Stores
- Offices
- Restaurants
- Medical Facilities
- Schools
- Warehouses
- Industrial Facilities
- And more!
Need a commercial electrician in Salem, NH today? Call (603) 874-1402 and we’ll work to get someone out the same day.
Premier Commercial Lighting Services
Your company’s lighting choices can have a direct impact on employee productivity, safety, and customer experience. Our commercial electrical contractors can provide a lighting analysis and help you decide on the best lighting for your company’s needs.
Our commercial lighting installation services include parking lot, security, and safety lighting, as well as practical and design lighting solutions. Before starting the installation process, we’ll inspect your current electrical system and confirm it can handle new lighting loads. If you run into issues with your lights down the road, our commercial lighting services also include timely repairs so you can keep your business running.
LED retrofit and energy-efficient lighting upgrades are among the most common improvements we handle for Salem, NH businesses. Switching to LED can reduce operating costs over time and may qualify for utility rebates. We assess your current setup, recommend the right fixture types and controls, and handle the full installation.
Effective & Reliable Commercial Wiring Services
When you hire us for commercial electrical services, our electricians provide clear recommendations on the best layout and quality installation of new wiring and rewiring solutions to suit your business and industry. All our professionals know how to read blueprints and can safely troubleshoot problems with circuits, switchgear, controls, and lighting systems. Commercial and industrial settings frequently run three-phase power systems and high-capacity panels that require a contractor with the right experience. Our team handles both.
If you notice wiring issues such as electrical sparks, heat, or smoke coming from your outlets or fixtures, or circuit breakers frequently tripping, it’s time to schedule commercial wiring services. We’ll closely inspect your electrical system to find the root cause and then perform targeted repairs. We also provide electrical panel upgrades and wiring services as part of renovation and new-construction projects. Fire and smoke alarm wiring into your building’s mains is available as well, giving you hardwired early warning coverage that plug-in units can’t match.
Dependable Commercial Surge Protection Services
Plug-in surge protectors can only do so much to protect your devices from high-voltage events. One thunderstorm or utility disturbance can cause damage requiring costly repairs. Whole-building surge protection installed at the panel level provides broader coverage than individual plug-in units. Our commercial surge protection services help reduce the chance of damage to your equipment, wiring, and data records. When an irregularity in the power supply is detected, the surge protector diverts excess voltage safely away, protecting everything connected to your system.
Professional Services for Phone, Cable, & Data Systems
Our commercial electricians can install all your communication wiring for telephone, cable, and data services. We can add new sockets or move existing ones to more convenient locations to accommodate new equipment or a reconfigured workspace.
Commercial Backup Power Generator Installations
Installing a commercial generator can help your business keep equipment operating, devices connected, and security systems functioning during an outage. When the main power goes out, your generator can auto-start, providing a seamless transition to backup power. Once the utility supply is restored, it can switch off automatically.
Generator sizing for a commercial facility depends on your critical load requirements. When you hire us for generator installation, we consult with you on the right capacity to cover your communication, data, security, refrigeration, production line, medical equipment, and other essential systems. Getting the sizing right from the start helps you avoid costly corrections later.
Safety Inspections & Code Compliance
Keeping your electrical systems operating safely isn’t optional. We perform commercial electrical safety inspections to identify issues before they become hazards, then carry out any required repairs or upgrades to bring your systems up to current safety and code compliance standards.
Commercial electrical systems in New Hampshire and Massachusetts must comply with the National Electrical Code (NEC) as adopted by each state. Our inspections verify current compliance and flag any violations that need to be addressed. Code requirements can also shift when a building changes use. A space converted from retail to medical or industrial use typically requires a full electrical assessment. Our commercial electrical contractors handle change-of-use refits from end to end, covering all the reconfiguration your new operational demands require.
Why Salem, NH Businesses Choose Cornerstone Services
Salem businesses have straightforward options when they need a commercial electrician, and we compete on specifics, not promises. Here’s what that looks like in practice.
Our per-job pricing means the number we quote is the number on your invoice. No hourly overruns and no surprise line items after the fact. Every completed job carries a signed workmanship warranty under our quality assurance policy. Same-day service is available for businesses that need help quickly, and our 24/7 on-call staff handles scheduling, questions, and urgent needs around the clock.
Every worker we send to your property has passed a background check before arriving on site. Financing options are available for larger projects, and we run monthly promotions that create opportunities to save on scheduled services. Ask about current terms when you schedule.
Beyond electrical, Cornerstone Services handles plumbing, HVAC, cleaning, and handyman work under one roof. Commercial clients who work with us coordinate one contractor across multiple trades instead of managing separate vendors. Every trade comes under the same pricing structure and the same signed warranty. More than 1,250 five-star reviews across Google, HomeAdvisor, Facebook, and Yelp show how that level of accountability adds up over time.
FAQs About Commercial Electrical Services
What Qualifies as Commercial Electrical Work?
Commercial electrical services typically involve wiring, lighting, power distribution, and systems serving business properties such as offices, retail spaces, medical facilities, and industrial buildings. It differs from residential service in scale, code requirements, and uptime expectations.
When Should I Call a Commercial Electrical Contractor Instead of a Regular Electrician?
If your project involves large-scale installations, three-phase power systems, production equipment, high-capacity panel upgrades, or business continuity concerns, you’ll want a contractor experienced in commercial and industrial electrical design and service. The code requirements and safety complexity at the commercial level are meaningfully different from residential work.
Do You Serve Industrial Facilities?
Yes. Our industrial electrician services cover heavy machinery wiring, motor controls, factory lighting, power distribution upgrades, and preventive maintenance plans for large-scale operations. If you’re not sure whether your facility qualifies, call us and we’ll give you a straight answer.
The Cornerstone Difference: Built on Trust. Backed by Service.
The service standards behind the thousands of positive experiences our customers share year after year.
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Flat-Rate Pricing
The price you're quoted before the job begins is the price you pay at completion, no hourly adjustments, no surprise charges.
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On-Time Arrival
Service vehicles are staged at multiple locations so we show up when we say we will, not hours after your window closes.
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Signed Workmanship Warranty
Every job comes with a signed warranty under our quality assurance policy. You get a written record of what the work covers.
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Background-Checked Workers
Every technician passes a background check before they step onto your property, regardless of the trade or type of job.
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Same-Day Scheduling
Call us and we'll work to get a technician out the same day. Our on-call staff is available 24 hours a day, every day of the week.
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Clean Job Sites
Your home or business will be left clean when we're done. Technicians are responsible for cleaning up after every job, no exceptions.
1,250+ Five-Star Reviews & Counting
We let our work speak for itself. From quick repairs to major installs, our customers say it best.
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Paul Quinn did electrical work for me and he was the best!Nicola Sullivan
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Michael with Cornerstone Services was excellent to work with.Jamie Fasbender
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He was very professional and explained all that he was doing.Mary Duford
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Showed up as agreed and was very informative.John Cote
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Fast response and very professional.Anne Butterworth
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On time. Thorough. Kind. Positive attitude in this awful heat.N N
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Cornerstone came promptly and fixed them.Marilyn Frank
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He and his partner PJ worked quickly and efficiently to solve a dryer vent issue we had been experiencing.Pierre Thelusma
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Took care of our electrical needs with ease!Peter Larocque
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He was quick, thorough, professional, and made sure everything was done right.Jess Nichol
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10/10 experience and so happy we got in touch with him and this company!Anthony Capozzi
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They were so neat, you would never know there was a problem.Bill Mullen
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Paul is always friendly, polite, and professional.Cindy Marcin
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Paul was efficient and expert at correcting the problem and ensuring all was well.Woodrow Cook
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He went above and beyond for me when some unforeseen issues arose with my bathtub install.Susan Hevey
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Tech was on time, friendly, and competent.Vincent JJ Balukonis
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He was very thorough and quickly corrected the issue.Gary Chisholm
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Josh was very prompt with his services and explained things clearly.Kim Mcanany
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Arnold is a pleasure to work with.Esther Bradbury
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Jason is always great and knowledgeable and friendly.Mark Duell