Denisco Electric

Denisco Electric describes itself on its website as a Manchester, New Hampshire electrical contractor, owner-operated by TJ, doing residential and commercial service upgrades, whole-house rewires, panel replacements, EV chargers and mini-split heat pumps. Thomas J Denisco's New Hampshire electrician licence, number 13599, is active on the state registry, and his Massachusetts electrician licence, number 2859, is active on the state registry as well. On Google it holds a 5-star average from 126 ratings. A customer researching an EV charger said owner TJ was the only one of three businesses to return the call, that he explained the process, and that the charger install later went smoothly. A customer said Denisco installed new indoor lighting and an outside electrical box at their home. A customer said Dylan and Dalton consulted them every step of the way on new light fixtures. A 2026 customer said TJ quoted a recessed lighting job clearly and walked them through the process, and that everything was completed in one day. A 2025 customer said John arrived on time when their GFCI outlet stopped working and quickly diagnosed the problem. A 2024 customer said the owner answered immediately when a basement plug was smoking, and that Mike came out within a couple hours and fixed the outlet. A 2023 customer said the company separated their 11-family apartment building into 12 different meters. A 2021 customer said TJ came out to diagnose a partial loss of power at a commercial building in Manchester and coordinated with Eversource. A 2025 Reddit commenter in r/newhampshire said they had used Denisco Electric for a bunch of work at their place and called the company honest.