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Spark runs on named electricians. Across 466 Google ratings averaging 4.9, the same handful of first names keep coming back — Tim, Sean, Alan, Justin — usually attached to a specific job: a panel swapped, a hot tub wired, a generator transfer switch fitted, GFCI outlets added in a kitchen. The Londonderry company's New Hampshire electrician licence is active, held by Justin A Smith. The everyday work is broad. Recent customers describe an electric panel replaced along with a whole-house surge protector in a house the prior owner had, in one reviewer's words, "micky moused" together; a hot tub wired and a subpanel replaced; and a call where the technician chased a tripping pool-filter breaker and concluded the fault was the pump motor rather than the wiring. In October 2025, a customer whose well-pump breaker kept tripping said the diagnostic pointed at the well but also turned up a separate problem in the breaker box that needed resolving. Generators recur throughout, including one installed in cold driving rain in December 2024 by a crew that vacuumed up inside before leaving. Two accounts pull the other way, and both concern wiring nobody can see. In November 2025 a customer wrote that they had been told no wires ran behind a service box, found that they did, and put it bluntly: "Got lucky and didn't die." In October 2025 the owner of a three-unit multi-family described paying $7,400 to have the panels separated, upgraded and rewired to the correct units — then, a few years later, a tenant in a small one-bedroom seeing winter bills as high as $580 a month. Another electrician found the circuits had not all been transitioned to the right unit, and bringing that electrician in voided the five-year warranty. Price reads differently depending on who you ask. Several customers call the pricing reasonable, and an August 2025 reviewer said Spark had the best price around for grounding an above-ground pool and installing a subpanel. In a December 2025 New Hampshire thread, one commenter called the company knowledgeable but very pricey while another in the same thread said its rates were reasonable. Scheduling is the consistent bright spot: a September 2025 hot tub hookup where the quote visit and the crew arrived the same day and the work was done in a few hours; a 2022 co-op call answered with an arrival at 9:03 for a 9:05 appointment; full price quotes given before the work starts. For panels, generators, hot tubs and everyday troubleshooting this is a busy shop with a deep, recent review history and an active licence. On anything that changes how the house is wired — a panel separation, a rewire, work behind a service box — get the scope in writing, ask what a second opinion would do to the warranty, and have the finished work inspected.
“I’ve used Spark Electric in the past. They’re very thorough and their rates are reasonable.”
“Spark was super knowledgeable about everything I asked them about, but they were also very pricey”
“Spark Electric in Londonderry. Top notch humans.”
Alan and Olivia provided outstanding service. They quickly found and fixed the electrical issue we were having, and they also replaced an old outlet. We really appreciate that all of our outlets and AC units are now working properly. We are very grateful for Alan and Olivia’s professionalism, expertise, and excellent service. Thank you. The Herrera family.
Spark Electric did amazing work upgrading our kitchen outlets to GFCI and also replacing our electric panel, with full house surge protector. We have peace of mind here now, especially since the poor house we bought a few years back was “micky moused”together by the prior owner! I can sleep at night now knowing that Spark Electric did such a great job bringing the house up to code. The crew was very professional and explained the process and expectations to us perfectly, (Big thanks to Derek and Tim). Sherrilynn was also very helpful with finding us the best appointment times to fit into our busy schedule. This is a company we will be using for all future electrical needs and will recommend to everyone! Thanks Justin/Spark Electric for a wonderful experience upgrading our home. 😊
The Spark crew was outstanding both office and field. By far the best electric contractor I've ever dealt with. Can't say enough about them. Highly recommend them.
We were extremely impressed with Spark Electric. They wired a hot tub for us and replaced a subpanel, and the entire experience was outstanding. Their team was professional, knowledgeable, and efficient from start to finish. The quality of their work was excellent, and they provided great customer service throughout the project. I highly recommend Spark Electric to anyone looking for reliable and professional electrical work.
Evaluated issue with circuit breaker tripping for pool filter. Diagnosed motor issue, not electrical.
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Certified attributes are verified against the public registry. Others are the business's own statement.
1 change recorded — last scanned Aug 23, 2026.
EV chargers, hot tubs, and pool circuits5.0
Knob-and-tube replaced5.0
Old-house wiring5.0
Emergency arrival4.8
Water heater swaps3.4
Emergency speed2.6
Large institutional jobs2.8
Same-day response4.0