Verified record
Denisco Electric is a Manchester electrical contractor run by Thomas "TJ" Denisco, working both sides of the border: his New Hampshire electrician licence 13599 and his Massachusetts licence 2859 are both verified active in their state registries. Its Google profile is 5 stars from 126 ratings, and the Better Business Bureau shows no complaints on file. Customers describe a small crew they see repeatedly — Mike, Dylan, Dalton, Trevor, John on the vans, Jayme handling scheduling — and that continuity is a theme in the reviews. A March 2026 customer who has used the company for home and business since 2019 pointed to the same crew still being there as the thing that told them most about the firm. The work spans small fixes to whole-building jobs. Recent reviews cover recessed lighting laid out room by room and finished in a day, an outdoor electrical box, a GFCI outlet diagnosed and repaired in one visit, and a panel replacement. A June 2026 customer researching EV chargers said Denisco was the only one of three companies to return the call, then handled the install once the car arrived. In a 2023 review, a landlord described an 11-family apartment building split into 12 separate meters and panels; another that year had two whole-house generators installed, and a 2026 reviewer had a knob-and-tube replacement done after being told elsewhere it could not be done. Urgent work shows up too. In a December 2024 review, a customer with a smoking basement outlet said the owner answered immediately and had an electrician there within a couple of hours; in a 2021 review, a Manchester commercial building with partial power loss had the fault traced across both the building and the utility transformer, with the company coordinating the Eversource side. Pricing draws consistent comments: quotes that match the invoice, one January 2025 customer billed less than the quote, and several reviewers calling the rates fair for the trade. Scheduling can be the constraint — in a 2022 review, a customer was quoted a month's wait, then called back within days when a slot opened. For residential and light commercial electrical work in southern New Hampshire — panels, lighting, EV chargers, generator hookups — the record here is unusually clean and consistent. Get the estimate in writing as customers describe, and ask where you fall in the schedule if the job is not urgent.
“I've used Denisco Electric for a bunch of work at my place. They've always been honest and gave me the best prices.”
Very professional and thoughtful. Priced very reasonable. Will be using again
Dylan & Dalton were top notch professionals. They consulted me every step of the way. My light fixtures look amazing…they were meticulous in every detail. Highly recommend!!!
We used Denisco Electric to install new indoor lighting and an outside electrical box at our home. The electricians that did the work at our home were very courteous and professional from start to finish. I would highly recommend Denisco Electric for any electrical work you need done.
I needed a EV charger installed a my home. Didn’t have the car yet but was researching. Through a google search I found 3 businesses that advertise they install chargers. I emailed or called the 3. Owner TJ was the only business that returned my call. TJ he explained the process with clarity. Then just a couple of weeks later I bit the bullet and bought my first EV. The charger install went smoothly. The workers that came were terrific, efficient, professional and informative. Highly recommend Denesico Electric.
Love my new recess lighting. Always a pleasure working with TJ Denisco and his whole company.
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1 change recorded — last scanned Aug 23, 2026.
Emergency arrival4.8
Repair over replace4.6
Same-day response4.0
Large institutional jobs2.8
Old-house wiring5.0
Emergency speed2.6
Sewer laterals3.2