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    Verified electrical services reviews

Find Electricians in Hopkinton

Avatar for Cotti-Johnson Heating-Cooling-Electrical

Cotti-Johnson Heating-Cooling-Electrical

30 Waverly St
4.68(
155
)
Approved Pro

Cotti-Johnson Heating-Cooling-Electrical

30 Waverly St
4.68(
155
)
Approved Pro
Customers say: Super punctual
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
980 local quotes requested

Experiencing issues with your heating, air conditioning, plumbing, or electrical systems? Cotti-Johnson is your reliable one-stop shop for all home comfort needs. From simple fixes to large-scale projects, our professional team handles everything with honesty and expertise. We offer 24/7 emergency services and specialized design services for landscape and indoor lighting. Trust us for top-notch, efficient, and transparent service. Visit our website at callcotti.com or call us at (833) 826-8844 to see how we can improve your home's comfort and efficiency.

"Happy with the work, and the customer service. Will definitely call on them for future work."

Fran P on June 2025

Experiencing issues with your heating, air conditioning, plumbing, or electrical systems? Cotti-Johnson is your reliable one-stop shop for all home comfort needs. From simple fixes to large-scale projects, our professional team handles everything with honesty and expertise. We offer 24/7 emergency services and specialized design services for landscape and indoor lighting. Trust us for top-notch, efficient, and transparent service. Visit our website at callcotti.com or call us at (833) 826-8844 to see how we can improve your home's comfort and efficiency.

"Happy with the work, and the customer service. Will definitely call on them for future work."

Fran P on June 2025


Avatar for Nicholson Plumbing Heating & Air Conditioning Inc

Nicholson Plumbing Heating & Air Conditioning Inc

71 Whitney Street
4.54(
560
)
Approved Pro

Nicholson Plumbing Heating & Air Conditioning Inc

71 Whitney Street
4.54(
560
)
Approved Pro
Customers say: Super punctual
51 local quotes requested
25 years of experience

Nicholson Plumbing, Heating & Air Conditioning is the company of choice for all your plumbing, heating and air conditioning repair and replacement needs. Our commitment is to you, our customer, and to provide you with outstanding plumbing and HVAC service. You can rest assured with our 100% satisfaction guarantee, 24-hour emergency service, solid warranty and highly trained technicians. Serving the Metro West, MA's service and installation needs. Fully Licensed in MA Plumbing and Gas Fitting. Lic# 30207. Universal EPA Certified & 410A Certified. Fully Insured. Nicholson Plumbing, Heating & Air Conditioning offers a 5% senior discount on service repairs.

"Went very well and got more information than with other companies."

Susan H on April 2025

Nicholson Plumbing, Heating & Air Conditioning is the company of choice for all your plumbing, heating and air conditioning repair and replacement needs. Our commitment is to you, our customer, and to provide you with outstanding plumbing and HVAC service. You can rest assured with our 100% satisfaction guarantee, 24-hour emergency service, solid warranty and highly trained technicians. Serving the Metro West, MA's service and installation needs. Fully Licensed in MA Plumbing and Gas Fitting. Lic# 30207. Universal EPA Certified & 410A Certified. Fully Insured. Nicholson Plumbing, Heating & Air Conditioning offers a 5% senior discount on service repairs.

"Went very well and got more information than with other companies."

Susan H on April 2025


Avatar for FM Generator

FM Generator

35 Pequit St
4.70(
20
)
Approved Pro

FM Generator

35 Pequit St
4.70(
20
)
Approved Pro
Customers say: Super punctual
Recommended by 90% of Angi customers
Recommended by 90% of HomeAdvisor customers
33 local quotes requested

We are a full-service home generator provider offering turnkey residential installations, service contracts, and emergency response, we also install whole home backup batteries.***WE DO NOT SERVICE PORTABLE GENERATORS** Family owned and operated, we have sold, installed and serviced generators for over 40 years! Our history is working with commercial generators, so we know the importance of reliability! Reliability is our product which is why we sell Fortress, an exclusive Briggs and Stratton brand of home generators. We can even save you money on a smaller generator with the Symphony II Home Power Management System! FM Generator - Keeping Families Powered for over 40 years! **Fully installed automatic home power system packages starting at $7,500**

"They were able to send someone to the house within a few days of initial contact. He wasn’t able to troubleshoot the problem directly but he was able to reach out to someone who could and everything was taken care of quickly and efficiently. Would absolutely contact them again in the future!"

Amanda F on January 2025

We are a full-service home generator provider offering turnkey residential installations, service contracts, and emergency response, we also install whole home backup batteries.***WE DO NOT SERVICE PORTABLE GENERATORS** Family owned and operated, we have sold, installed and serviced generators for over 40 years! Our history is working with commercial generators, so we know the importance of reliability! Reliability is our product which is why we sell Fortress, an exclusive Briggs and Stratton brand of home generators. We can even save you money on a smaller generator with the Symphony II Home Power Management System! FM Generator - Keeping Families Powered for over 40 years! **Fully installed automatic home power system packages starting at $7,500**

"They were able to send someone to the house within a few days of initial contact. He wasn’t able to troubleshoot the problem directly but he was able to reach out to someone who could and everything was taken care of quickly and efficiently. Would absolutely contact them again in the future!"

Amanda F on January 2025


Avatar for RC Electric

RC Electric

199 Elm St
5.00(
3
)
Approved Pro

RC Electric

199 Elm St
5.00(
3
)
Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
32 local quotes requested

We are a Massachusetts based electrical contractor working throughout the commonwealth with over 25 years of experience. Specialize in providing homeowners with top quality work and a wonderful experience along the way! We are licensed, fully insured and provide free estimates to all. Our team is very knowledgeable and understands the codes put into place by the National Electric Code as well as Massachusetts amendments that are added and enforced. Electrical projects can be very tricky and quite intimidating at times if you are unfamiliar with the trade or uncertain how to go about a certain project. This is why on all of our jobs we strive to connect and explain every option available that suits specific wants and needs. We are very proud of our workmanship, cleanliness and approach to all of our customers. Our goal is to have a 110% satisfied customer that is happy to have worked with us and will continue to call us again in the future! Some services include but are not limited to - -Panel Changes -Service Repairs/Upgrades -Remodels/Additions -Electrical Diagnosis -Recessed Lighting /Outdoor Lighting Design -Smart Home Applications -Switching/Receptacles/Hubs -Generator Setups -Surge Protection -Safety Inspections/Smoke Detectors -Knob+Tube Demo If you are interested in speaking with us about your next project give us a call or send an email and we will schedule a time to meet and go over all your options! Thank you for the opportunity to work with us, we look forward to hearing from you!

"Really well, very professional and in a timely manner."

Judy W on April 2024

We are a Massachusetts based electrical contractor working throughout the commonwealth with over 25 years of experience. Specialize in providing homeowners with top quality work and a wonderful experience along the way! We are licensed, fully insured and provide free estimates to all. Our team is very knowledgeable and understands the codes put into place by the National Electric Code as well as Massachusetts amendments that are added and enforced. Electrical projects can be very tricky and quite intimidating at times if you are unfamiliar with the trade or uncertain how to go about a certain project. This is why on all of our jobs we strive to connect and explain every option available that suits specific wants and needs. We are very proud of our workmanship, cleanliness and approach to all of our customers. Our goal is to have a 110% satisfied customer that is happy to have worked with us and will continue to call us again in the future! Some services include but are not limited to - -Panel Changes -Service Repairs/Upgrades -Remodels/Additions -Electrical Diagnosis -Recessed Lighting /Outdoor Lighting Design -Smart Home Applications -Switching/Receptacles/Hubs -Generator Setups -Surge Protection -Safety Inspections/Smoke Detectors -Knob+Tube Demo If you are interested in speaking with us about your next project give us a call or send an email and we will schedule a time to meet and go over all your options! Thank you for the opportunity to work with us, we look forward to hearing from you!

"Really well, very professional and in a timely manner."

Judy W on April 2024


Avatar for Wired Electrical Contractors, Inc.

Wired Electrical Contractors, Inc.

277 MAIN ST
4.91(
196
)
Approved Pro

Wired Electrical Contractors, Inc.

277 MAIN ST
4.91(
196
)
Approved Pro
Super Service Award
Customers say: Quality work
Recommended by 95% of Angi customers
Recommended by 95% of HomeAdvisor customers
83 local quotes requested

At WIRED Electrical Contractors, we’re pursuing excellence: from your initial consultation to our superior warranties and follow-through. Owned and operated by master electrician Paul Crowley, our team of trained and certified master electricians provide MetroWest MA homeowners with quality craftsmanship, upfront pricing, and attentive responsiveness throughout every project phase. Our focus on quality has earned us the Angi Super Service Award for ten years running. We are a full service residential electrical contractor. We specialize in home EV charging installations and are Tesla trained and certified. We are also certified installers with Qmerit, Chargepoint, and ClipperCreek.

"Paul was on time and got to work right away. He was very respectful of my home and put on boot covers as soon as he entered and placed a plastic protecter on the floor beneath where the fan was to be installed. Very neat and clean. While performing the installation, he informed me that the mounting bracket that was used for the original fan was only rated for a light fixture and showed me the difference between the screws used for the current bracket and the proper one. He quoted a price for the proper bracket and I gladly obliged. He also installed a new wall switch that controls both the fan and light kit wirelessly. The final results are perfect. Before he left, I asked him about replacing my noisy bathroom fan with something quiet and with a heater. Since a new line to a circuit breaker would have to be dropped, he checked out my electrical panel. He informed me that my current electrical panel was not up to code and who ever worked on the panel to add new breakers overloaded the panel (22 breakers in a 20 breaker panel). He was not pushy at all in having the panel upgraded to the proper size but did inform me of potential issues I could have in the future and that it is not up to code. I am extremely satisfied with the job Paul did and I plan on having Paul perform the other needed services I require. A+."

Michael L on June 2018

At WIRED Electrical Contractors, we’re pursuing excellence: from your initial consultation to our superior warranties and follow-through. Owned and operated by master electrician Paul Crowley, our team of trained and certified master electricians provide MetroWest MA homeowners with quality craftsmanship, upfront pricing, and attentive responsiveness throughout every project phase. Our focus on quality has earned us the Angi Super Service Award for ten years running. We are a full service residential electrical contractor. We specialize in home EV charging installations and are Tesla trained and certified. We are also certified installers with Qmerit, Chargepoint, and ClipperCreek.

"Paul was on time and got to work right away. He was very respectful of my home and put on boot covers as soon as he entered and placed a plastic protecter on the floor beneath where the fan was to be installed. Very neat and clean. While performing the installation, he informed me that the mounting bracket that was used for the original fan was only rated for a light fixture and showed me the difference between the screws used for the current bracket and the proper one. He quoted a price for the proper bracket and I gladly obliged. He also installed a new wall switch that controls both the fan and light kit wirelessly. The final results are perfect. Before he left, I asked him about replacing my noisy bathroom fan with something quiet and with a heater. Since a new line to a circuit breaker would have to be dropped, he checked out my electrical panel. He informed me that my current electrical panel was not up to code and who ever worked on the panel to add new breakers overloaded the panel (22 breakers in a 20 breaker panel). He was not pushy at all in having the panel upgraded to the proper size but did inform me of potential issues I could have in the future and that it is not up to code. I am extremely satisfied with the job Paul did and I plan on having Paul perform the other needed services I require. A+."

Michael L on June 2018


Avatar for Nascimento Electric

Nascimento Electric

161 W Mountain St
5.00(
7
)
Approved Pro

Nascimento Electric

161 W Mountain St
5.00(
7
)
Approved Pro
Super Service Award
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
31 local quotes requested

We specialize in electrical services, repairs, installs, troubleshooting, lighting, panel upgrades, ceiling fans, EV/Electric Charging Stations, and more! We guarantee your satisfaction, and we won’t leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Check out all the services we offer below and call -or- click to schedule a free estimate today!

"Jean was very responsive, punctual and professional. He was superb in communication, answering all of my questions promptly. He was highly flexible and came up with solutions when needed. He paid great attention to details, and had wonderful finishing touches. He cleaned up after work thoroughly and generally showed utmost care and respect to your property. Such a nice person to work with. Highly recommended and will definitely hire again!"

Takao I on February 2025

We specialize in electrical services, repairs, installs, troubleshooting, lighting, panel upgrades, ceiling fans, EV/Electric Charging Stations, and more! We guarantee your satisfaction, and we won’t leave until the job is done right. We pride ourselves on the quality work we provide, while delivering great customer service! Check out all the services we offer below and call -or- click to schedule a free estimate today!

"Jean was very responsive, punctual and professional. He was superb in communication, answering all of my questions promptly. He was highly flexible and came up with solutions when needed. He paid great attention to details, and had wonderful finishing touches. He cleaned up after work thoroughly and generally showed utmost care and respect to your property. Such a nice person to work with. Highly recommended and will definitely hire again!"

Takao I on February 2025


Avatar for VMA Electric Inc

VMA Electric Inc

81 Maple St
4.83(
445
)
Approved Pro

VMA Electric Inc

81 Maple St
4.83(
445
)
Approved Pro
Super Service Award
Customers say: Super punctual
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
241 local quotes requested

Medium size Electrical Company based out of Metrowest Area. Currently have 9 licensed employees. Always free estimates. All pricing is based on specific work.

"The installation went quickly and easily for us, and the level 2 charger is just where we need it. I am grateful that I can park, get charging, and be in the house with a cup of tea within a few short minutes. It is so convenient, and the car charges quickly. The VMA installers were so helpful in getting me started once the installation was finished. We have had VMA do quite a few household projects for us, and everything about them is excellent, from scheduling, to the actual work, and to billing. Highly recommend!"

Rosalind F on September 2025

Medium size Electrical Company based out of Metrowest Area. Currently have 9 licensed employees. Always free estimates. All pricing is based on specific work.

"The installation went quickly and easily for us, and the level 2 charger is just where we need it. I am grateful that I can park, get charging, and be in the house with a cup of tea within a few short minutes. It is so convenient, and the car charges quickly. The VMA installers were so helpful in getting me started once the installation was finished. We have had VMA do quite a few household projects for us, and everything about them is excellent, from scheduling, to the actual work, and to billing. Highly recommend!"

Rosalind F on September 2025


Avatar for Rodenhiser Home Services

Rodenhiser Home Services

325 Hopping Brook Rd
4.39(
506
)
Approved Pro

Rodenhiser Home Services

325 Hopping Brook Rd
4.39(
506
)
Approved Pro
Customers say: Super punctual
402 local quotes requested
97 years of experience

When it comes to great service for your home or business, it doesn't get better than the professionalism and dedication of Rodenhiser. It's an unsurpassed level of service built on a promise that ensures you get the very best - when you call Rodenhiser your satisfaction is guaranteed. With 90+ years of delighted residential and commercial clients, you can be sure that it's a promise that Rodenhiser delivers on every day.

"The work was done correctly and promptly, but quite expensive. On the plus side, he presented all the options and didn't really try to upsell. Just the facts."

Stephen M on August 2024

When it comes to great service for your home or business, it doesn't get better than the professionalism and dedication of Rodenhiser. It's an unsurpassed level of service built on a promise that ensures you get the very best - when you call Rodenhiser your satisfaction is guaranteed. With 90+ years of delighted residential and commercial clients, you can be sure that it's a promise that Rodenhiser delivers on every day.

"The work was done correctly and promptly, but quite expensive. On the plus side, he presented all the options and didn't really try to upsell. Just the facts."

Stephen M on August 2024


Avatar for Heritage Home Service

Heritage Home Service

109 Washington St
4.29(
21
)
Approved Pro

Heritage Home Service

109 Washington St
4.29(
21
)
Approved Pro
Customers say: Quality work
265 local quotes requested
39 years of experience

Heritage Home Service is proud to serve residents from Massachusetts. We are the area’s premier home services provider and for 35+ years, we’ve brought the Heritage touch to homes throughout the state.

"I was told that the fee to simply come into my house to assess my furnace (that was not working) would be $260 on a Wednesday afternoon... and I was told this fee would not be absorbed into the work if I chose to have it done. If this company charges such an exorbitant assessment fee, I could only believe they would inflate other fees as well. I hired another local company for half that fee to assess then repair my furnace. Shame on Heritage Home Service."

Jeffrey D on December 2024

Heritage Home Service is proud to serve residents from Massachusetts. We are the area’s premier home services provider and for 35+ years, we’ve brought the Heritage touch to homes throughout the state.

"I was told that the fee to simply come into my house to assess my furnace (that was not working) would be $260 on a Wednesday afternoon... and I was told this fee would not be absorbed into the work if I chose to have it done. If this company charges such an exorbitant assessment fee, I could only believe they would inflate other fees as well. I hired another local company for half that fee to assess then repair my furnace. Shame on Heritage Home Service."

Jeffrey D on December 2024


Avatar for NETR Inc

NETR Inc

85 FLAGSHIP DR
4.79(
76
)
Approved Pro

NETR Inc

85 FLAGSHIP DR
4.79(
76
)
Approved Pro
Customers say: Super punctual
Recommended by 93% of Angi customers
Recommended by 93% of HomeAdvisor customers
252 local quotes requested

For emergency services, please call 781-933-6387. N.E.T.R., Inc. is here to help homeowners install the best heating and cooling systems that fits their needs. Since 1989, we’ve installed heating and cooling systems in Boston and its surrounding areas, tackling tough problems that our clients face. Our goal is to ensure our clients have energy efficient, quiet, reliable systems so they can live their lives to the fullest both at home and at work. Our dedication to our customers’ needs is what drives us each and every day. Our approach to temperature control and comfort has helped us become one of the most respected names in heating, cooling, and refrigeration in New England

"Before installing a mini-split, the sales person told me that I'd need to cut down an interior shelf to a specific height. I paid a handyman $400 to do exactly what the sales person instructed. Later on, N.E.T.R. came and did the installation; however, AFTER the installation, a technician told me that they hadn't accounted for the vent opening and closing and that the shelf would need to be further cut down. As you can imagine, this type of service is rather ridiculous. If they knew that the shelf would need further cutting, they should have NOT installed the unit. I have called N.E.T.R. six (6) times in three weeks, and no one has called me back about this issue. After paying for the unit and for a handyman, it's ridiculous that I have AC that is compromised because no one with the company thought to properly measure the space so that the work by the handyman could be done once. At this point, I'd like for N.E.T.R. to take care of this for me."

Linda O on June 2025

For emergency services, please call 781-933-6387. N.E.T.R., Inc. is here to help homeowners install the best heating and cooling systems that fits their needs. Since 1989, we’ve installed heating and cooling systems in Boston and its surrounding areas, tackling tough problems that our clients face. Our goal is to ensure our clients have energy efficient, quiet, reliable systems so they can live their lives to the fullest both at home and at work. Our dedication to our customers’ needs is what drives us each and every day. Our approach to temperature control and comfort has helped us become one of the most respected names in heating, cooling, and refrigeration in New England

"Before installing a mini-split, the sales person told me that I'd need to cut down an interior shelf to a specific height. I paid a handyman $400 to do exactly what the sales person instructed. Later on, N.E.T.R. came and did the installation; however, AFTER the installation, a technician told me that they hadn't accounted for the vent opening and closing and that the shelf would need to be further cut down. As you can imagine, this type of service is rather ridiculous. If they knew that the shelf would need further cutting, they should have NOT installed the unit. I have called N.E.T.R. six (6) times in three weeks, and no one has called me back about this issue. After paying for the unit and for a handyman, it's ridiculous that I have AC that is compromised because no one with the company thought to properly measure the space so that the work by the handyman could be done once. At this point, I'd like for N.E.T.R. to take care of this for me."

Linda O on June 2025

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Showing 1-10 of 226
Electrical questions, answered by experts

There are three main wires on a doorbell, typically color-coded white, black, and green, that are connected to a transformer box in your home. One wire runs to the doorbell button, another wire runs to the door chime, and the third wire runs between the doorbell button and the door chime.

Unless you’re a licensed electrician, you should not DIY any electrical work in your home. Working with wires and electricity is potentially dangerous to both you and the structure you’re working on, and it could lead to house fires or electric shock if you’re not 100% sure what you’re doing. There’s a big difference between changing a light switch cover and rewiring an entire home. If you’re staring down a potentially difficult electrical job, give a pro a call.

For many homeowners, sheds are more than storage spaces for tools or lawn care appliances. If you’re thinking about building a work space outdoors or could make your life simpler by running electricity to a spot that’s closer to your yard, it could absolutely be worth the cost.

To install an outlet from existing wiring, you’ll need to choose a location where you can already access existing wiring. The easiest way to do this is to install an outlet on the other side of the wall of an existing outlet. 

Since the wiring is already in place, all you have to do is connect a new cable to the existing wiring and then connect the correct wires through the wall—to the new electrical outlet. Place your new outlet into the opening in the wall and then connect the correct wires to the appropriate terminal screws.

By nature, two-prong outlets aren't grounded—but the box they run to might be, which makes them safer. The safest way to test if an outlet is grounded is to purchase a circuit tester, which cost about $20 at home improvement stores. 

If you discover your outlet (or outlets) aren't grounded, know that this greatly increases your risk of personal injury and electrical fires. You may want to consider installing new three-prong ground fault circuit interrupter (GFCI) outlets. On average, the cost to install GFCI outlets is about $210 per outlet.

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The Hopkinton, MA homeowners’ guide to electrical services

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