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Electrical wiring or panel upgrade pros in Rockville

Lilly Electric
4412 Olando Lane
4.96(
27
)
Approved Pro
Lilly Electric
4412 Olando Lane
4.96(
27
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
7 years of experience

Proudly serving Greenbelt and the surrounding areas of Prince George’s, Montgomery, Howard, and Anne Arundel counties Maryland. Our team of licensed and experienced master electricians are dedicated to delivering the highest quality workmanship. We stay up-to-date with the latest industry standards and best practices, so you can trust us to provide safe and efficient electrical solutions for your home. We believe in open communication and transparency throughout every project. Our friendly and responsive staff is here to answer your questions, address your concerns, and guide you through the process, from your initial service call to the completion of your project. Call or visit us online to schedule an appointment today!

"Top rate Company, they replaced my electrcal panel and did my pool bonding in Sept 2024. Ryan the Electrician was very professional, prompt and explained everything in detail. The permit inspector said whoever replaced my panel did a great job, did not cut corners. I would highly recommend using them."

Teresa C on October 2024

Proudly serving Greenbelt and the surrounding areas of Prince George’s, Montgomery, Howard, and Anne Arundel counties Maryland. Our team of licensed and experienced master electricians are dedicated to delivering the highest quality workmanship. We stay up-to-date with the latest industry standards and best practices, so you can trust us to provide safe and efficient electrical solutions for your home. We believe in open communication and transparency throughout every project. Our friendly and responsive staff is here to answer your questions, address your concerns, and guide you through the process, from your initial service call to the completion of your project. Call or visit us online to schedule an appointment today!

"Top rate Company, they replaced my electrcal panel and did my pool bonding in Sept 2024. Ryan the Electrician was very professional, prompt and explained everything in detail. The permit inspector said whoever replaced my panel did a great job, did not cut corners. I would highly recommend using them."

Teresa C on October 2024


Avatar for One Source, LLC
One Source, LLC
7914 Queenair Drive
5.00(
5
)
Approved Pro
One Source, LLC
7914 Queenair Drive
5.00(
5
)
Approved Pro
Customers say: Quick response
11 years of experience
Free onsite estimate

One Source Systems is one of the premier custom integrators in the greater Washington D.C. area. We are focused on an elevated client experience and meeting your needs for Smart Home design, including experiential elements such as lighting, shades and incredible dedicated theater and Audio/Video solutions. With over 10 years of experience in the audio industry, we are the experts you need to take care of your home or business. We will treat your home as we would treat our own. Give One Source a call today - we look forward to working with you!

"They stayed all day arriving at like 10:00am to get the job done and didn’t leave until like 11:30pm"

Steve B on July 2021

One Source Systems is one of the premier custom integrators in the greater Washington D.C. area. We are focused on an elevated client experience and meeting your needs for Smart Home design, including experiential elements such as lighting, shades and incredible dedicated theater and Audio/Video solutions. With over 10 years of experience in the audio industry, we are the experts you need to take care of your home or business. We will treat your home as we would treat our own. Give One Source a call today - we look forward to working with you!

"They stayed all day arriving at like 10:00am to get the job done and didn’t leave until like 11:30pm"

Steve B on July 2021


Avatar for DELTA Electric, LLC
DELTA Electric, LLC
20013 Sweetgum Circle Apartment 41
5.00(
2
)
Approved Pro
DELTA Electric, LLC
20013 Sweetgum Circle Apartment 41
5.00(
2
)
Approved Pro
4 years of experience
Free onsite estimate

We take great pride our experience, expertise, quality, and customer service that we provide to meet the consumer need. 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 in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.

We take great pride our experience, expertise, quality, and customer service that we provide to meet the consumer need. 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 in a professional manner. Our reputation is based on service, safety, and quality, regardless of how large or small the job.


Avatar for A Electric & Construction
A Electric & Construction
2128 Edgewater Parkway
4.75(
2
)
Approved Pro
A Electric & Construction
2128 Edgewater Parkway
4.75(
2
)
Approved Pro
Customers say: Terrific value
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
8 years of experience

detail service

"They were on time and the job was done fast with highest quality and at a very reasonable price. They were friendly and professional. They installed a panel and generator for me and replaced some old wiring around the house. Recommend them to all."

Amin M on August 2020

detail service

"They were on time and the job was done fast with highest quality and at a very reasonable price. They were friendly and professional. They installed a panel and generator for me and replaced some old wiring around the house. Recommend them to all."

Amin M on August 2020


Avatar for Three Brothers Services, LLC
Three Brothers Services, LLC
12202 Amblewood Drive
4.97(
57
)
Approved Pro
Three Brothers Services, LLC
12202 Amblewood Drive
4.97(
57
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
16 years of experience

We are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We have many years of experience to give you confidence that we are your number one choice for your next home project. You will find us to be competitively priced with close attention to the details of each and every project that we are involved with. We look forward to building lasting relationships and guarantee your satisfaction! Licensed & Bonded Maryland Home Improvement #141947 Maryland Master Electrician #14130 Virginia Master Electrician #2710073038

"Three Brothers is the best. We have hired Saul and team for several electrical projects both big and small over the past few years. They have never disappointed. Highly recommend for any electrical needs."

David G on July 2023

We are a locally owned and operated company that values honesty and integrity and treats your home as if it were our own. We have many years of experience to give you confidence that we are your number one choice for your next home project. You will find us to be competitively priced with close attention to the details of each and every project that we are involved with. We look forward to building lasting relationships and guarantee your satisfaction! Licensed & Bonded Maryland Home Improvement #141947 Maryland Master Electrician #14130 Virginia Master Electrician #2710073038

"Three Brothers is the best. We have hired Saul and team for several electrical projects both big and small over the past few years. They have never disappointed. Highly recommend for any electrical needs."

David G on July 2023


Avatar for Mark H. Anderson Electrical Services, Inc.
Mark H. Anderson Electrical Services, Inc.
3090 Sleepy Meadow Dr.
4.84(
372
)
Approved Pro
Mark H. Anderson Electrical Services, Inc.
3090 Sleepy Meadow Dr.
4.84(
372
)
Approved Pro
Super Service Award
Customers say: True professional
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
13 local quotes requested

Established in 1990, Mark H. Anderson continues to lead the competition within the Baltimore and surrounding areas. Your home is your castle and you don't take that investment lightly, neither do I. For over sixteen years, discriminating homeowners have looked to Mark H. Anderson for their electrical needs. Our one on one service is our dedication to your vision. Mark H. Anderson Electric prides themselves on an outstanding record of quality service and attention to detail. The foundation of our company has been built by satisfied clients giving us the name of their business associate, neighbor, or friends. Our philosophy is to treat your home as we would our own, and this is complimented by our unprecedented standing within the industry. Our reputation is a testament to the level of service and quality of result you'll get and can expect when you choose Mark H. Anderson for your electrical needs: Experienced: We are experienced in the residential electrical sector. Our company has satisfied customers throughout the metro area. Ask our customers, and they will tell you that there is nothing we can not do when it comes to electrical service. Qualified: Our high quality of experience allows us to quickly determine what the problem is and fix it quickly and safely. Dependable: We are prompt and on time. You will not be left waiting! Honest: We will find the problem and fix it fast! And we will always provide you with the lowest price possible. Neat: We never leave a mess. After our work is done, we do the cleaning. References: We provide customer references upon request, so just ask us. In fact, we will be glad to provide you with proof of our own Maryland Electrical Licenses.

"Response to request was almost immediate and followed up with a phone. He was on time and completed the project in a timely manner. He was knowledgeable and vey polite."

Philomina C on January 2025

Established in 1990, Mark H. Anderson continues to lead the competition within the Baltimore and surrounding areas. Your home is your castle and you don't take that investment lightly, neither do I. For over sixteen years, discriminating homeowners have looked to Mark H. Anderson for their electrical needs. Our one on one service is our dedication to your vision. Mark H. Anderson Electric prides themselves on an outstanding record of quality service and attention to detail. The foundation of our company has been built by satisfied clients giving us the name of their business associate, neighbor, or friends. Our philosophy is to treat your home as we would our own, and this is complimented by our unprecedented standing within the industry. Our reputation is a testament to the level of service and quality of result you'll get and can expect when you choose Mark H. Anderson for your electrical needs: Experienced: We are experienced in the residential electrical sector. Our company has satisfied customers throughout the metro area. Ask our customers, and they will tell you that there is nothing we can not do when it comes to electrical service. Qualified: Our high quality of experience allows us to quickly determine what the problem is and fix it quickly and safely. Dependable: We are prompt and on time. You will not be left waiting! Honest: We will find the problem and fix it fast! And we will always provide you with the lowest price possible. Neat: We never leave a mess. After our work is done, we do the cleaning. References: We provide customer references upon request, so just ask us. In fact, we will be glad to provide you with proof of our own Maryland Electrical Licenses.

"Response to request was almost immediate and followed up with a phone. He was on time and completed the project in a timely manner. He was knowledgeable and vey polite."

Philomina C on January 2025


Avatar for Electrical Connections, LLC
Electrical Connections, LLC
12 Meem Avenue, Suite G
4.89(
33
)
Approved Pro
Electrical Connections, LLC
12 Meem Avenue, Suite G
4.89(
33
)
Approved Pro
Customers say: Quick response
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
53 local quotes requested

Electrical Connections, LLC, is Washington DC metro areas most trusted electricians. We specialize in residential electrical service and repairs. When you are in the need of a professional electrician to repair your breakers, lights, switches, plugs, or any electrical issues in your home we are the company to call. Our technicians can also upgrade your panel, install your flat screen TVs, and install recessed lights. Call us today and talk to a live person to schedule a date and time that is convenient for you.

"I've hired Electrical Connections -- specifically, Franklin -- for a variety of projects. And I'll continue to do so. First, Franklin has been responsive to my texts; he shows up on time; and he's patient in explaining things and offering options. Second, he does good work. Some projects have been difficult; some have been easy. Either way, I have confidence that Franklin will fix what needs to be done, and do so with pricing that's transparent and fair."

Jonathan R on February 2025

Electrical Connections, LLC, is Washington DC metro areas most trusted electricians. We specialize in residential electrical service and repairs. When you are in the need of a professional electrician to repair your breakers, lights, switches, plugs, or any electrical issues in your home we are the company to call. Our technicians can also upgrade your panel, install your flat screen TVs, and install recessed lights. Call us today and talk to a live person to schedule a date and time that is convenient for you.

"I've hired Electrical Connections -- specifically, Franklin -- for a variety of projects. And I'll continue to do so. First, Franklin has been responsive to my texts; he shows up on time; and he's patient in explaining things and offering options. Second, he does good work. Some projects have been difficult; some have been easy. Either way, I have confidence that Franklin will fix what needs to be done, and do so with pricing that's transparent and fair."

Jonathan R on February 2025


Avatar for Clinton Electric Company, Inc.
Clinton Electric Company, Inc.
1524 York Rd
4.31(
143
)
Approved Pro
Clinton Electric Company, Inc.
1524 York Rd
4.31(
143
)
Approved Pro
Customers say: Quality work
124 local quotes requested
56 years of experience

For 50 years and two generations, Clinton Electric Company, Inc., has been the premier electrical contractor in Maryland. Since 1969, we have taken great pride in providing excellent electrical service to over 50,000 loyal customers in the Greater Baltimore area. With over 80% of our business coming from repeat customers and referrals, we take that as a great vote of confidence in Clinton Electric!

"Great job"

Charles B on December 2024

For 50 years and two generations, Clinton Electric Company, Inc., has been the premier electrical contractor in Maryland. Since 1969, we have taken great pride in providing excellent electrical service to over 50,000 loyal customers in the Greater Baltimore area. With over 80% of our business coming from repeat customers and referrals, we take that as a great vote of confidence in Clinton Electric!

"Great job"

Charles B on December 2024


Avatar for G Electric, LLC
G Electric, LLC
8855 Garland Avenue, Unit #12
5.00(
9
)
Approved Pro
G Electric, LLC
8855 Garland Avenue, Unit #12
5.00(
9
)
Approved Pro
Customers say: Quick response
15 years of experience
Free onsite estimate

Our mission at G Electric, LLC, is to continue the growth of our business by doing right by all of our clients. We love seeing that one of a kind smile on a home owners face at the end of a project! G Electric, LLC, stacks up with the competition, and surpasses it with competitive prices, second to none workmanship, and a prompt, and responsive team! We give you quality that you can measure, and a finished product that will enhance your home forever. Call us today!

"Yes, he did the job right. very professional. would like to have him for my next job."

David B on April 2025

Our mission at G Electric, LLC, is to continue the growth of our business by doing right by all of our clients. We love seeing that one of a kind smile on a home owners face at the end of a project! G Electric, LLC, stacks up with the competition, and surpasses it with competitive prices, second to none workmanship, and a prompt, and responsive team! We give you quality that you can measure, and a finished product that will enhance your home forever. Call us today!

"Yes, he did the job right. very professional. would like to have him for my next job."

David B on April 2025


Avatar for Provident Electric
Provident Electric
4253 Old National Pike
4.91(
77
)
Approved Pro
Provident Electric
4253 Old National Pike
4.91(
77
)
Approved Pro
Customers say: Quality work
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
198 local quotes requested

Family owned and operated Electrical contracting company, servicing residential and commercial clients. Specializing in back-up generators, full rehabs, remodels and additions. We also have bucket truck service available. We are Licensed and insured in most metropolitan cities and counties in Maryland, DC, Va. Minimum service charge applies per service call.

"Larry and his crew upgraded our under cabinet lighting with new LED lighting, and specialized outlet. Not only was our home and its contents treated as if they lived here, the job was done professionally. So much so, that the only issue we had was when the switch/outlet face plate screws came loose. I didn’t even bother calling Larry, I tightened them myself. The lighting is on, literally 24 hours per day since the install, with zero issues. Love these guys."

Chris F on December 2024

Family owned and operated Electrical contracting company, servicing residential and commercial clients. Specializing in back-up generators, full rehabs, remodels and additions. We also have bucket truck service available. We are Licensed and insured in most metropolitan cities and counties in Maryland, DC, Va. Minimum service charge applies per service call.

"Larry and his crew upgraded our under cabinet lighting with new LED lighting, and specialized outlet. Not only was our home and its contents treated as if they lived here, the job was done professionally. So much so, that the only issue we had was when the switch/outlet face plate screws came loose. I didn’t even bother calling Larry, I tightened them myself. The lighting is on, literally 24 hours per day since the install, with zero issues. Love these guys."

Chris F on December 2024

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Electrical wiring or panel upgrades FAQs

While homeowners with substantial electrical knowledge might technically attempt a subpanel installation, most local building departments require permits and inspections for this type of work. Professional electricians understand local code requirements, can obtain necessary permits, and ensure the installation meets safety standards. Given the significant safety risks associated with incorrect electrical work, most homeowners benefit from hiring a licensed professional.

A standard subpanel installation takes an average of four to eight hours. This timeframe may extend if you're installing multiple subpanels or adding specialized circuits like those for spa equipment. Factors such as difficult access points, complex wiring paths, or permit processing times can also affect the overall project duration.

Adding a subpanel doesn't directly reduce electricity consumption or lower your utility bills. A subpanel simply redistributes power from your main panel to additional circuits. However, organizing your electrical system more efficiently may help prevent overloaded circuits and the associated problems. For actual cost savings, consider energy-efficient appliances and lighting instead.

The appropriate subpanel size depends on your specific electrical requirements. Consider the number and type of devices you'll be powering, potential future needs, and the capacity of your main electrical panel. An electrician can perform a load calculation to determine the most suitable amperage rating for your situation, ensuring you have adequate power without overpaying for unnecessary capacity.

A main electrical panel connects directly to your utility's power supply and contains your home's primary service disconnect. It distributes electricity throughout your entire house. A subpanel, by contrast, receives power from the main panel and redistributes it to a specific area of your home. Think of the main panel as the primary distribution point and the subpanel as a secondary branch that extends your electrical system's reach.

While electrical upgrades aren't as immediately visible as kitchen or bathroom renovations, they can contribute to your home's functionality and safety. Prospective buyers often appreciate updated electrical systems that can accommodate modern power demands. A properly installed subpanel that provides additional capacity for workshops, home offices, or future expansions could be an attractive feature for certain buyers, though the direct impact on home value varies by market.

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