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

Avatar for William G Hyman Electrical Contractor
William G Hyman Electrical Contractor
4.8(
440
)
Electrical Wiring or Panel Upgrade

Serving Rockville, MD and surrounding areas

Approved

Super Service Award Winner

In business since 1980

Free estimates

Warranties offered

"Project was upgrading service from 100 to 200 amps, installing new panel, new meter, grounding, and a new drop from the street. I gathered a number of quotes, and by far felt the most comfortable with Mr. Hyman. Plus the price for the job was in line with my expectations. The work was completed quickly and professionally. I'd definitely recommended using them."
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+6

Response time10 hrs
2 neighbors recently requested a quote
Recommended by96%of homeowners
Avatar for Greenleaf Electric, LLC
Greenleaf Electric, LLC
5.0(
120
)
Electrical Wiring or Panel Upgrade

Serving Rockville, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2010

Free estimates

Customers say: True professional

"Gill is a professional and pleasant Master electrician. He handled my FP breaker panel replacement and wiring a new line to break up an overloaded kitchen circuit. His prices are reasonable and his work quality is excellent. I will definitely hire him again for my electrical needs."
Under Cabinet Lighting
Kitchen
Response time1 day
Response rate88%
5 neighbors recently requested a quote
JOHN MAX ELECTRIC
5.0(
22
)
Electrical Wiring or Panel Upgrade

Serving Rockville, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2011

Free estimates

Emergency services offered

"I found John Max Electric on Angi and couldn’t be happier with their service. They arrived promptly with a team of three skilled professionals who tackled each of the five electrical issues with precision and efficiency. What really stood out to me was their honesty—there was no price haggling, no upselling, and no push to sign up for a membership. I often feel anxious about hiring companies for repairs because of past experiences with unfair pricing or high-pressure tactics, but John Max Electric was a breath of fresh air. They were professional, fair, and top-notch in every way. If you’re looking for reliable and trustworthy electricians, I highly recommend John Max Electric. They’ve earned my trust and my business for any future electrical!"
Electrical Project
Electrical Project
Electrical Project
Response time1 day
Response rate100%
1 neighbors recently requested a quote
Avatar for NEC Electric
NEC Electric
4.6(
14
)
Electrical Wiring or Panel Upgrade

Serving Rockville, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2008

Free estimates

Emergency services offered

"It was very easy to work with Joe to finalize a quote and get the job scheduled. Once onsite, Carlos and his colleague knew exactly what to do and how to run the new electric circuit across the house from the electrical panel to the garage. The installed the EV charger we had purchased separately exactly how we wanted it. Everything worked perfectly. They even went the extra mile to come back and patch the garage drywall where they had made a few holes to run the cable even though it was not included in the job initially. Overall very happy with both the price we paid and the quality of the work. Will hire again for any electrical work we'll need."
Electrical Project
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+11

Response time2 days
Response rate100%
47 neighbors recently requested a quote
Green's Electric
5.0(
25
)
Electrical Wiring or Panel Upgrade

Serving Rockville, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2007

Free estimates

Emergency services offered

"I recently had an electrical issue in my bedroom and contacted Green's Electric and Plumbing. I was impressed by their prompt response and professionalism. They quickly diagnosed the problem and efficiently resolved it, ensuring the safety of my home. Their expertise and attention to detail were evident throughout the process. I highly recommend Green's Electric and Plumbing for any electrical needs. Thank you for the outstanding service!"
Response time1 day
Response rate100%
23 neighbors recently requested a quote
Avatar for J A Electric LLC.
J A Electric LLC.
4.9(
53
)
Electrical Wiring or Panel Upgrade

Serving Rockville, MD and surrounding areas

Approved

Super Service Award Winner

In business since 2015

Free estimates

Emergency services offered

"I had issues with 2 lights and circuit breaker in my home and JA Electrical were a godsend. I heard back from them within minutes of placing online quotes in my area. I was able to get a tech, Antonio, out to my home the same day. He worked ho*** ** getting my issue resolved and he succeeded. He's very professional, timely, and I would highly recommend him and the company to anyone having issues."
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+25

Response time12 hrs
6 neighbors recently requested a quote
Recommended by64%of homeowners
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FAQs for electrical wiring or panel upgrade projects in Rockville, MD

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 Rockville, MD 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.