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Electrical wiring or panel upgrade pros in Portsmouth

Diamond Electrical Contractors, LLC

204 Saint James Avenue
4.83(
75
)
Approved Pro

Diamond Electrical Contractors, LLC

204 Saint James Avenue
4.83(
75
)
Approved Pro
Customers say: Quick response
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
24 local quotes requested

We are not currently offering smaller electrical services, including outlets, fixtures, running wire or panels for things that are not in the home like rvs or boats. We only service electrical panel upgrades within the home and the average cost for this service is around 5000$ but cost will go up or vary according to scope of project. At Diamond Electrical Contractors, LLC our training and experience is second to none. For electrical work you can trust, call the professionals at Diamond Electrical Contractors today!

"I am writing to express my sincere appreciation for the outstanding work performed by Diamond Electric during a recent electrical service upgrade at our property. From start to finish, the entire crew demonstrated professionalism, punctuality, and exceptional craftsmanship. They arrived on time, communicated clearly throughout the process, and completed the work efficiently and safely. What stood out most was their attention to detail—even the smallest aspects of the job were handled with care and precision. It’s not often that you come across contractors who combine technical expertise with such a strong commitment to quality and customer satisfaction. I would not hesitate to work with them again, and I highly recommend their services to anyone in need of electrical work."

David R on July 2025

We are not currently offering smaller electrical services, including outlets, fixtures, running wire or panels for things that are not in the home like rvs or boats. We only service electrical panel upgrades within the home and the average cost for this service is around 5000$ but cost will go up or vary according to scope of project. At Diamond Electrical Contractors, LLC our training and experience is second to none. For electrical work you can trust, call the professionals at Diamond Electrical Contractors today!

"I am writing to express my sincere appreciation for the outstanding work performed by Diamond Electric during a recent electrical service upgrade at our property. From start to finish, the entire crew demonstrated professionalism, punctuality, and exceptional craftsmanship. They arrived on time, communicated clearly throughout the process, and completed the work efficiently and safely. What stood out most was their attention to detail—even the smallest aspects of the job were handled with care and precision. It’s not often that you come across contractors who combine technical expertise with such a strong commitment to quality and customer satisfaction. I would not hesitate to work with them again, and I highly recommend their services to anyone in need of electrical work."

David R on July 2025


Avatar for B and H Electric, LLC

B and H Electric, LLC

35 Daniel Dr
5.00(
3
)
Approved Pro

B and H Electric, LLC

35 Daniel Dr
5.00(
3
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
2 years of experience

You can depend on us to provide a high quality service at a fair and honest price. We understand that the future of our business depends upon our reputation and that is why customer service is by far our highest priority. If you are looking for a professional you can trust, please call today to schedule a no-obligation estimate!

"Very friendly and took that time to make sure everything was done just right."

Paula M on December 2023

You can depend on us to provide a high quality service at a fair and honest price. We understand that the future of our business depends upon our reputation and that is why customer service is by far our highest priority. If you are looking for a professional you can trust, please call today to schedule a no-obligation estimate!

"Very friendly and took that time to make sure everything was done just right."

Paula M on December 2023


Matthew Wilson Electric

270 Ash Swamp Rd
4.97(
30
)
Approved Pro

Matthew Wilson Electric

270 Ash Swamp Rd
4.97(
30
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
6 years of experience

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!

"Matthew is very pleasant and competent. I will gladly use his service again."

Janet S on August 2024

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business!

"Matthew is very pleasant and competent. I will gladly use his service again."

Janet S on August 2024


Avatar for PEAK POWER NH LLC

PEAK POWER NH LLC

20 Oak St.
5.00(
25
)
Approved Pro

PEAK POWER NH LLC

20 Oak St.
5.00(
25
)
Approved Pro
Customers say: Quick response
25 years of experience
Free onsite estimate

We're dedicated to providing our clients with the very best in installation, service, and repair for your heating and cooling needs. Our company is built on honesty and integrity. We specialize in central A/C and cooling systems as well as heating and furnace systems. We take pride in the quality of our work and our commitment to outstanding results. We look forward to building long-term relationships with our clients, and guarantee your satisfaction.

"Very quick to respond and was out to my house within an hour of putting in the request. Could also perform the work that week. "

Dave M on August 2025

We're dedicated to providing our clients with the very best in installation, service, and repair for your heating and cooling needs. Our company is built on honesty and integrity. We specialize in central A/C and cooling systems as well as heating and furnace systems. We take pride in the quality of our work and our commitment to outstanding results. We look forward to building long-term relationships with our clients, and guarantee your satisfaction.

"Very quick to respond and was out to my house within an hour of putting in the request. Could also perform the work that week. "

Dave M on August 2025


Avatar for Mr. Wilson Electric Inc

Mr. Wilson Electric Inc

37 HIGH ST
5.00(
1
)
Approved Pro

Mr. Wilson Electric Inc

37 HIGH ST
5.00(
1
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
1 years of experience

With over 12 years of experience, we take pride in our attention to detail. We offer high quality worksmanship in order to make sure all of the clients needs are met and addressed. We go above and beyond to make sure we are informing the client. We pride our company on high quality work and always arrive on time. We understand that when it comes to electricity, there's no room for error, which is why we provide service you can trust – every time. Give us a call today, we look forward to working with you!

"On time Returns calls Over comes problems. Good personallity"

ALEX Z on June 2024

With over 12 years of experience, we take pride in our attention to detail. We offer high quality worksmanship in order to make sure all of the clients needs are met and addressed. We go above and beyond to make sure we are informing the client. We pride our company on high quality work and always arrive on time. We understand that when it comes to electricity, there's no room for error, which is why we provide service you can trust – every time. Give us a call today, we look forward to working with you!

"On time Returns calls Over comes problems. Good personallity"

ALEX Z on June 2024


Avatar for Copper and Oak LLC

Copper and Oak LLC

9 Arrowhead Dr
5.00(
4
)
Approved Pro

Copper and Oak LLC

9 Arrowhead Dr
5.00(
4
)
Approved Pro
Customers say: Quick response
28 local quotes requested
5 years of experience

At Copper and Oak LLC our priorities are customer service and quality work. We pride ourselves on building lasting relationships with our clients. Call us for an estimate. We look forward to working with you!

"Everything went perfectly from start to finish. We have high cathedral ceilings in our home that required staging to hang three large, heavy fixtures and it all went flawlessly! Chris and his team were professional, neat, and fairly priced. Highly recommend. "

Linda E on June 2025

At Copper and Oak LLC our priorities are customer service and quality work. We pride ourselves on building lasting relationships with our clients. Call us for an estimate. We look forward to working with you!

"Everything went perfectly from start to finish. We have high cathedral ceilings in our home that required staging to hang three large, heavy fixtures and it all went flawlessly! Chris and his team were professional, neat, and fairly priced. Highly recommend. "

Linda E on June 2025


Avatar for Higgz Electric, LLC

Higgz Electric, LLC

14 Stanley Pond Drive
5.00(
2
)
Approved Pro

Higgz Electric, LLC

14 Stanley Pond Drive
5.00(
2
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
17 local quotes requested

We take great pride our experience, expertise, quality and customer service that we provide to meet your needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer a professional manner. Our reputation is based on service, safety and quality, regardless of how large or small the job.

"Replaced a broken light fixture in the back of my home. He made a suggestion for a motion sensor light which I hadn't had before. Very respectful in my space while I was working."

Daniel K on May 2023

We take great pride our experience, expertise, quality and customer service that we provide to meet your needs. It is our mission to provide excellent workmanship and complete customer satisfaction from start to completion of a project. In order to understand the needs and expectations of our customers, we take great care to work and communicate with every customer a professional manner. Our reputation is based on service, safety and quality, regardless of how large or small the job.

"Replaced a broken light fixture in the back of my home. He made a suggestion for a motion sensor light which I hadn't had before. Very respectful in my space while I was working."

Daniel K on May 2023


Avatar for ARETE ELECTRIC

ARETE ELECTRIC

10 Nicole Dr
5.00(
16
)
Approved Pro

ARETE ELECTRIC

10 Nicole Dr
5.00(
16
)
Approved Pro
Customers say: Quick response
13 years of experience
Free onsite estimate

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Book with us online or feel free to give us a call today!

"Professional work. Reasonable pricing. Great to work with"

Kevin S on May 2025

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Book with us online or feel free to give us a call today!

"Professional work. Reasonable pricing. Great to work with"

Kevin S on May 2025


Avatar for MW Driscoll Electric, LLC

MW Driscoll Electric, LLC

6 Hunter Ct
5.00(
2
)
Approved Pro

MW Driscoll Electric, LLC

6 Hunter Ct
5.00(
2
)
Approved Pro
25 years of experience
Free onsite estimate

We offer over 30 years of experience in the electrical industry. We take on a wide range of electrical projects to include full installation for additions and remodels as well as wiring and panel upgrades and a variety of other jobs. We're committed to providing a personalized service for each individual project we take on & look forward to building strong, long-term relationships with our clients and guarantee your satisfaction.

"Mike was excellent! He put in a ceiling light (where there was no light before), replaced a ceiling light and put in a new outlet. He was efficient, courteous and most importantly did the job well! We will definitely hire him again. "

Ashley C on July 2025

We offer over 30 years of experience in the electrical industry. We take on a wide range of electrical projects to include full installation for additions and remodels as well as wiring and panel upgrades and a variety of other jobs. We're committed to providing a personalized service for each individual project we take on & look forward to building strong, long-term relationships with our clients and guarantee your satisfaction.

"Mike was excellent! He put in a ceiling light (where there was no light before), replaced a ceiling light and put in a new outlet. He was efficient, courteous and most importantly did the job well! We will definitely hire him again. "

Ashley C on July 2025


Avatar for Granite State Solar

Granite State Solar

57 Ryan Rd
New on HomeAdvisorNew on HomeAdvisor
Approved Pro

Granite State Solar

57 Ryan Rd
New on HomeAdvisorNew on HomeAdvisor
Approved Pro
141 local quotes requested
17 years of experience

Granite State Solar creates resilient energy systems for homes and businesses throughout New Hampshire. We meet your energy needs with custom generator, battery backup and solar panel installations.

Granite State Solar creates resilient energy systems for homes and businesses throughout New Hampshire. We meet your energy needs with custom generator, battery backup and solar panel installations.

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FAQs for electrical wiring or panel upgrade projects in Portsmouth, NH

Electrical wiring can last between 50 and 70 years if properly installed and maintained. However, factors like moisture damage and overloading outlets can shorten this lifespan. To extend your wiring's life, unplug electronics when not in use, avoid overloading outlets, and schedule regular electrical inspections every five to ten years.

If your house was built in the 1960s and hasn't been rewired, it likely needs it. Older homes may have outdated wiring like knob-and-tube, which poses fire risks due to flammable insulation. Rewiring ensures safety and may also require updating your circuit panel, outlets, switches, and fixtures. Contact a local electrician to help with your rewiring needs.

Yes, rewiring your house is worth it, especially if your wiring is outdated. It improves safety by reducing fire risks and can increase your property's value. However, you may not need a full rewire. A home inspector can tell you if a partial rewire will bring your home up to code.

Yes, you can sometimes rewire a house without removing walls. Electricians might access wiring through attics, basements, or crawl spaces, or make small holes to run new wires. However, this isn't always possible, and in some cases, removing sections of walls is necessary to ensure the wiring is installed safely and meets code.

A house should typically be rewired every 25 years to maintain safety. Over time, wiring deteriorates, increasing fire risks. Regular electrical inspections every five to ten years help assess the need for rewiring. Staying proactive with maintenance ensures a safe, efficient electrical system and prevents potential hazards before they become serious issues.

The Portsmouth, 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.