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FeaturedTaking CallsElectricians in Manchester, New Hampshire

Denisco Electric

Top Spot in Manchester Today 5.00 (121 reviews)(603) 505-2256

Denisco Electric

Denisco Electric is an electrical contractor in Manchester serving residential and commercial properties. Owner-operator TJ leads its projects.

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Business Highlights
  • Over 10 years of industry experience.
  • Fully licensed, bonded and insured.
Service Area

Amherst, Auburn, Hooksett, Bedford, Goffstown, Manchester and Londonderry.

Featured Local Business

Denisco Electric is one of 8 electricians ProsGrade lists in Manchester, New Hampshire.

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Featured on ProsGrade
Listing details

10 services listed, including Electrical service upgrades, Complete house rewiring and Electric heat installation. Open weekdays, closed on weekends. Rated 5.0 from 121 reviews.

  • Verified listing details
  • Service information
  • Customer review signals
  • Photo gallery
  • Public contact information
  • Published local profile

How This Business Compares

How Denisco Electric compares with the other 7 electricians on ProsGrade in Manchester, using public Google ratings and review counts.

  • Ranks in the top quarter of the 8 Manchester electricians on ProsGrade by Google rating and review volume.
  • Rated 5.0 on Google, at or above the 4.9 average of other Manchester electricians on ProsGrade.
  • Has more Google reviews (121) than 6 of the 7 other Manchester electricians on ProsGrade.
  • One of 7 Manchester electricians on ProsGrade rated 4.7 or higher from at least 10 reviews.

Services Covered

10 services
  • Electrical service upgrades100-amp to 200-amp or 400-amp service; new meter sockets.
  • Complete house rewiringNew copper wiring; grounded outlets.
  • Electric heat installationBaseboard, wall-mounted and radiant floor heating.
  • Circuit breaker panel replacementsNew breaker panels; surge protection.
  • Cat6 Ethernet installationCategory 6 cabling, wall plates and patch panels.
  • Electric vehicle charger installationLevel 2 chargers; dedicated 240-volt circuits.
  • Knob-and-tube removalNew copper wiring, grounded outlets and modern circuit breakers.
  • Heat pump installation (mini splits)Dedicated circuits, load calculations and outdoor disconnects.
  • LED commercial lightingInstallation and retrofits.
  • LED parking lot lightingInstallation and upgrades.

Reviews

What customers say

Customers praise Denisco Electric’s professional service, clear explanations and communication, and efficient, careful work; several also mention thorough cleanup. One customer appreciated an after-hours emergency visit and the installation of a home electric-car charger.

Customer Reviews

Victor A Fanas Burgos

Absolutely the best electrician I’ve worked with. Professional, knowledgeable, and very reliable. The work was done safely, efficiently, and exactly as promised. They took the time to explain everything clearly and made sure the job was done right the first time. Fair pricing, great communication, and top-quality workmanship. I highly recommend them to anyone looking for an honest and skilled electrician.
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Helen Parreira

Can’t recommend Denisco enough, came out for an emergency after hours call for us to make sure we were okay and had what we needed. Honest and fairly priced. They did a great job installing our home electric car charger and it has made life so much easier.
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Rolaundo Wright

Professional, responsive, and great workmanship. Trevor and Dillan did an excellent job, worked efficiently, and cleaned up thoroughly when they were done. Communication throughout the process was clear and easy with the owner TJ. I’d absolutely request this crew again for future projects. Highly recommend.
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David Cote

Denisco Electric was outstanding from start to finish. Their team was prompt, professional, and clearly knowledgeable, taking the time to explain what needed to be done and then completing the work efficiently and safely. They arrived when they said they would, cleaned up thoroughly, and the quality of the workmanship shows they take real pride in what they do. It is great to work with a fully licensed, insured local company that genuinely focuses on customer service and getting the job done right. I will definitely be calling them for future electrical projects and highly recommend them to anyone looking for a reliable electrician in the Manchester/Concord area.
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Hsiu Chang

Is 2025 and I've been using mr TJ and his company since 2018. He's helping me updating my electric panel because the summers are getting harder and I need more window AC. Thank you so much for great work as always. Also I really appreciate you installing the 5 head mini split by Samsung at a single-family home
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Frequently Asked Questions

How long does a complete house rewire take?

Most projects take several days to a week, depending on the home's size and wiring accessibility.

How are Denisco Electric's service upgrades handled?

The process includes permitting through final inspection. A temporary power shutdown is required during installation.

Does Denisco Electric install an entire mini-split system?

It handles the electrical portion and coordinates with HVAC professionals for the mechanical installation.

Can knob-and-tube removal require wall access?

Some access may be required to remove old wiring and install new circuits; the crew works to minimize disruption.