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Top-Rated Electrical wiring or panel upgrade pros in Londonderry - Updated Nov 2026

George E. Maihos Electric
4.4(
58
)
Electrical Wiring or Panel Upgrade

Serving Londonderry, NH and surrounding areas

Approved

In business since 1980

Free estimates

Emergency services offered

"George was great. He was responsive, informative, fair, and even got someone else to eventually pay for the work he did! Can not beat it!The electrical panel at my house shorted out and we were without power. This is especially difficult for my family because we have two children and need electricity to get water. We called him the morning it happened, he came out that night to look at it, and by lunch, the next day we had a new panel and power was back on. George also let us know that our panel failed because of faulty workmanship on the part of the utility company and that we should approach them for reimbursement. Our homeowner insurance told us that the utility would never pay and to file a claim. Our deductible was half the total cost of the project and we did not want our rates to go up when we renew. So with George help we submitted information to the utility and requested reimbursement. In less than a week they agreed to reimburse us for the full amount of the cost to replace the panel. They even covered the permitting fee. It was a thousand times easier than I would have ever guessed.We would not even have known it was an option to the hold the utility company accountable, or what information we would need to prove our case without George help. Hopefully nothing ever goes wrong again, but if it does we will definitely hire George again."
Response time7 hrs
Recommended by100%of homeowners
Avatar for ARETE ELECTRIC
ARETE ELECTRIC
5.0(
20
)
Electrical Wiring or Panel Upgrade

Serving Londonderry, NH and surrounding areas

Approved

Super Service Award Winner

In business since 2012

Free estimates

Credit card accepted

"Very professional work. They installed the breaker panel, outlets, lighting and mini-split in our newly constructed garage/workshop. The work they did was so good we had them come back and install another mini-split in our home basement. We highly recommend them!"
Response time2 days
1 neighbors recently requested a quote
Recommended by5%of homeowners
J.W. Chick Electric
4.8(
69
)
Electrical Wiring or Panel Upgrade

Serving Londonderry, NH and surrounding areas

Approved

In business since 2003

Free estimates

Credit card accepted

"Great job! Worked late into the day to ensure job was done. Total panel upgrade, lights added to the garage and corrected circuit issues in the kitchen including running a new, dedicated line. Clean up couldâ ve been better but thatâ s a minor issue as compared to the job done. Would hire again without a doubt"
Response time3 days
12 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Pellerin Electric, LLC
Pellerin Electric, LLC
4.6(
84
)
Electrical Wiring or Panel Upgrade

Serving Londonderry, NH and surrounding areas

Approved

In business since 2006

Free estimates

Warranties offered

"Upgraded the service to the house, grounds, new/larger primary panel, sub-panel installed in garage, exterior generator wired. Very neat/clean work, very quick. Very happy."
2 neighbors recently requested a quote
Recommended by98%of homeowners
Avatar for The Speedy Sparky LLC
The Speedy Sparky LLC
5.0(
8
)
Electrical Wiring or Panel Upgrade

Serving Londonderry, NH and surrounding areas

Approved

In business since 2023

Free estimates

Warranties offered

"Aubrey is great. We set an appointment which he was prompt for. He estimated the time which he was also right on the money, and the work was done neat, clean, and everything tested perfectly. This is the second time I have had him do some work for me and will call him for anything else electrical that I have."
Camper outlet & breakers
Camper outlet & breakers
Response time11 hrs
Response rate90%
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FAQs for electrical wiring or panel upgrade projects in Londonderry, NH

Yes, a licensed electrician is essential for this project. Running an electrical service from the road to your house involves connecting to utility power lines, complying with national and local electrical codes, and safely handling high-voltage systems. 

Licensed professionals understand proper wire sizing, grounding requirements, and voltage drop calculations needed for safe installation. Most jurisdictions require permits and inspections that only certified professionals can obtain. The safety risks and potential for property damage make this project inappropriate for DIY attempts.

Overhead installations are less expensive than underground options. For a 1000-foot run, overhead service costs between $8,000 and $15,000, while underground service ranges from $10,000 to $25,000. 

Overhead lines require less labor and fewer materials since they don't need trenching or conduit. However, underground lines offer better protection from weather events and aesthetic benefits. Your decision should balance your budget constraints with long-term reliability and visual preferences.

You might need to upgrade your electrical panel depending on your power requirements. If your existing panel cannot handle the additional load from the extended service, upgrading to a 200-amp service (costing $750 to $2,000) may be necessary. 

A licensed electrician can evaluate your current system and determine if an upgrade is required. Factors include what you'll be powering at the end of the line, existing electrical demand, and whether voltage drop over the distance will affect performance.

Running electric service from the road to a house requires electrical permits from your local building department, costing between $500 and $2,000 depending on your location. You may also need excavation permits for trenching work if installing an underground service. Your utility company will have its own application process for connecting to its grid. A licensed electrical contractor can handle all the necessary permit applications as part of their service, ensuring your installation meets all local code requirements.

The Londonderry, NH homeowners’ guide to electrical wiring or panel upgrades

From average costs to expert advice, get all the answers you need to get your job done.