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Find Electrical wiring or panel upgrade pros in Piedmont

Avatar for OSJ Electric

OSJ Electric

5.00(
2
)
Approved Pro

OSJ Electric

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

With over 20 years of experience in the electrical industry, OSJ ELECTRIC is your industry expert in Contra Costa County. We pride ourselves on our extreme professionalism, attention to detail, and high quality work. Our customer satisfaction guarantee will assure you we will not leave your property until you are completely satisfied with our work. As a family and locally owned and operated business you can trust that we will treat your home as we would treat our own. Give us a call today we look forward to working with you!

"Very friendly and knowledgeable."

Karen C on November 2022

With over 20 years of experience in the electrical industry, OSJ ELECTRIC is your industry expert in Contra Costa County. We pride ourselves on our extreme professionalism, attention to detail, and high quality work. Our customer satisfaction guarantee will assure you we will not leave your property until you are completely satisfied with our work. As a family and locally owned and operated business you can trust that we will treat your home as we would treat our own. Give us a call today we look forward to working with you!

"Very friendly and knowledgeable."

Karen C on November 2022


Avatar for Atomic Telecomm & Electrical Inc.

Atomic Telecomm & Electrical Inc.

4.94(
8
)
Approved Pro

Atomic Telecomm & Electrical Inc.

4.94(
8
)
Approved Pro
Customers say: Quick response
36 years of experience
Free onsite estimate

We can take on a wide range of residential projects to include computer network or wiring, telephone, security system installs and a variety of other projects. We take pride in the quality of our work and our commitment to outstanding results. We look forward to building strong, long-term relationships with our clients and guarantee your satisfaction.

"Job was tough due to small working space. They persisted and got the work done! Appreciated the extra help with cleanup and arranging the dryer for maximum efficiency."

Sheree L on November 2024

We can take on a wide range of residential projects to include computer network or wiring, telephone, security system installs and a variety of other projects. We take pride in the quality of our work and our commitment to outstanding results. We look forward to building strong, long-term relationships with our clients and guarantee your satisfaction.

"Job was tough due to small working space. They persisted and got the work done! Appreciated the extra help with cleanup and arranging the dryer for maximum efficiency."

Sheree L on November 2024


JLL Electric Company

New on HomeAdvisorNew on HomeAdvisor
Approved Pro

JLL Electric Company

New on HomeAdvisorNew on HomeAdvisor
Approved Pro
5 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!

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!


Avatar for Dalcon Electric

Dalcon Electric

4.81(
357
)
Approved Pro

Dalcon Electric

4.81(
357
)
Approved Pro
Customers say: Quick response
Recommended by 94% of Angi customers
Recommended by 94% of HomeAdvisor customers
240 local quotes requested

We are an Electrical Contracting Company providing top quality electrical services to South Bay, East Bay, and the Peninsula! David Lee, the owner of Dalcon Electric, started doing electrical work in the San Jose area over 30 years ago. Then, in 1993, he started Dalcon Electric in San Jose. With over 30 years of experience in both residential and commercial work, we take pride in our expertise and professionalism. We always give you a fair price and can often recommend ways to save you money on your electrical job. We are family owned and operated company! We are also licensed, bonded, and insured! Give us a call today! You’ll be in good hands! Ask about our Angie's List coupon and senior discounts. Award winning. Certified Copalum Installers. SPAN Certified Installers.

"Services went great. They arrived early very professional completed. The job completely cleaned up after they were done and were very professional during the entire project. I couldn’t recommend the gentleman any higher."

Chris (dad) B on July 2025

We are an Electrical Contracting Company providing top quality electrical services to South Bay, East Bay, and the Peninsula! David Lee, the owner of Dalcon Electric, started doing electrical work in the San Jose area over 30 years ago. Then, in 1993, he started Dalcon Electric in San Jose. With over 30 years of experience in both residential and commercial work, we take pride in our expertise and professionalism. We always give you a fair price and can often recommend ways to save you money on your electrical job. We are family owned and operated company! We are also licensed, bonded, and insured! Give us a call today! You’ll be in good hands! Ask about our Angie's List coupon and senior discounts. Award winning. Certified Copalum Installers. SPAN Certified Installers.

"Services went great. They arrived early very professional completed. The job completely cleaned up after they were done and were very professional during the entire project. I couldn’t recommend the gentleman any higher."

Chris (dad) B on July 2025


Avatar for Line Load Electric

Line Load Electric

5.00(
15
)
Approved Pro

Line Load Electric

5.00(
15
)
Approved Pro
1 years of experience
Free onsite estimate

We are committed to providing a personalized service for each individual project we take on & look forward to building strong, long-term relationships with our clients. We guarantee your satisfaction!

"He did perfect professionally complete the job on time. I am very impressed and pleased from his performance."

Rakesh D on December 2025

We are committed to providing a personalized service for each individual project we take on & look forward to building strong, long-term relationships with our clients. We guarantee your satisfaction!

"He did perfect professionally complete the job on time. I am very impressed and pleased from his performance."

Rakesh D on December 2025


James Gilbert Company

5.00(
1
)
Approved Pro

James Gilbert Company

5.00(
1
)
Approved Pro
16 years of experience
Free onsite estimate

James Gilbert Company has proudly served the Bay Area since 2010, specializing in commercial and industrial services while also supporting residential needs. We deliver customized solutions with quick estimates, competitive pricing, and exceptional attention to detail. Our reputation is built on reliability, integrity, and a commitment to customer satisfaction. As a screened and approved Angi professional, you can trust us for safe, high-quality work every time. From panel upgrades to a wide range of electrical improvements, we bring expertise you can depend on. Call us today and let’s get started!

"James Gilbert Co; the attention and service was prompt, Adam and David were super awesome, professional to the most superlative of the word. Recommended to the MAX! "

Eugenio N on October 2025

James Gilbert Company has proudly served the Bay Area since 2010, specializing in commercial and industrial services while also supporting residential needs. We deliver customized solutions with quick estimates, competitive pricing, and exceptional attention to detail. Our reputation is built on reliability, integrity, and a commitment to customer satisfaction. As a screened and approved Angi professional, you can trust us for safe, high-quality work every time. From panel upgrades to a wide range of electrical improvements, we bring expertise you can depend on. Call us today and let’s get started!

"James Gilbert Co; the attention and service was prompt, Adam and David were super awesome, professional to the most superlative of the word. Recommended to the MAX! "

Eugenio N on October 2025


Avatar for Electrical Pro

Electrical Pro

5.00(
11
)
Approved Pro

Electrical Pro

5.00(
11
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
4 years of experience

Electrical Pro provides Electrical Services for Hospitals and Health Care Facilities, Government and Department of Defense (DOD) Facilities, Residential Homes, Commercial Office Buildings, Industrial Manufacturing Facilities, Industrial Processing Facilities, Package Delivery Facilities, Package Sortation Facilities, Conveyors, Schools, Colleges, Universities, Libraries, Restaurants, and Storage Unit Facilities in the East Bay Area, CA. Call or click to schedule an estimate today! https://www.electricalpro.com

"It is my pleasure to recommend Anthony. He is knowledgeable, conscientious, highly skilled and professional. Before I could get back to him, he followed up with me by phone and was able to schedule and complete the work within the same day of contacting me. He came to the job with all necessary tools & replacement parts and completed the work within an hour. I will certainly call Anthony for any future electrical projects and plan to recommend him to my friends."

Cheryl R on February 2024

Electrical Pro provides Electrical Services for Hospitals and Health Care Facilities, Government and Department of Defense (DOD) Facilities, Residential Homes, Commercial Office Buildings, Industrial Manufacturing Facilities, Industrial Processing Facilities, Package Delivery Facilities, Package Sortation Facilities, Conveyors, Schools, Colleges, Universities, Libraries, Restaurants, and Storage Unit Facilities in the East Bay Area, CA. Call or click to schedule an estimate today! https://www.electricalpro.com

"It is my pleasure to recommend Anthony. He is knowledgeable, conscientious, highly skilled and professional. Before I could get back to him, he followed up with me by phone and was able to schedule and complete the work within the same day of contacting me. He came to the job with all necessary tools & replacement parts and completed the work within an hour. I will certainly call Anthony for any future electrical projects and plan to recommend him to my friends."

Cheryl R on February 2024


Avatar for Sepanta Electric, Inc.

Sepanta Electric, Inc.

5.00(
5
)
Approved Pro

Sepanta Electric, Inc.

5.00(
5
)
Approved Pro
Customers say: Quality work
10 years of experience
Free onsite estimate

At Sepanta Electric, we take immense pride in providing top-quality electrical services with a strong emphasis on customer satisfaction. Founded by Ben, an experienced professional with 15 years of industry expertise, our company has been serving clients since 2016. Our Commitment At the core of our business philosophy is a dedication to delivering outstanding results, upholding the highest standards of quality and safety. We believe in exceeding our customers' expectations through exceptional workmanship and attention to detail. Your satisfaction is our utmost priority. Find more info at WWW.sepantaelectric.com

"Ben and his team were professional and courteous throughout the process; from initial assessment, to obtaining the proper permits and of course the installation, testing and sign-off. Ben communicated effectively and involved me in the decision-making process along the way. The project was completed on-time and on-budget."

Jose B on July 2024

At Sepanta Electric, we take immense pride in providing top-quality electrical services with a strong emphasis on customer satisfaction. Founded by Ben, an experienced professional with 15 years of industry expertise, our company has been serving clients since 2016. Our Commitment At the core of our business philosophy is a dedication to delivering outstanding results, upholding the highest standards of quality and safety. We believe in exceeding our customers' expectations through exceptional workmanship and attention to detail. Your satisfaction is our utmost priority. Find more info at WWW.sepantaelectric.com

"Ben and his team were professional and courteous throughout the process; from initial assessment, to obtaining the proper permits and of course the installation, testing and sign-off. Ben communicated effectively and involved me in the decision-making process along the way. The project was completed on-time and on-budget."

Jose B on July 2024


Avatar for Perfect Star Heating and Air Conditioning

Perfect Star Heating and Air Conditioning

4.91(
261
)
Approved Pro

Perfect Star Heating and Air Conditioning

4.91(
261
)
Approved Pro
Super Service Award
Customers say: Quick response
973 local quotes requested
10 years of experience

With over 30 years of experience, Perfect Star Heating, Cooling, & Electrical is a locally owned and operated family business serving Alameda & Contra Costa County. We service all makes and models, offering top-quality comfort and energy efficiency solutions. Specializing in Furnace/Heating, Air Conditioning, and Ductless Mini-Split installation, we also provide repair and maintenance for Central HVAC systems, Ductwork, Indoor Air Quality, Electrical Repair & Installation, and Solar Installation. Free estimates are available for HVAC system replacement, new installations, and solar solutions. As a Lennox Premier Dealer, Daikin Comfort Pro, and WellAir Elite dealer, we are Diamond Certified, hold an A+ BBB Rating, and have been voted “The Best Heating & Air Company” and “The Most Community-Minded Company” by The Press in Brentwood, CA for two years. We are also SFGATE’s Best of the Bay Area Heating & A/C Service provider.

"Fast and efficient. Did not try to sell more work needed "

Barbara H on January 2026

With over 30 years of experience, Perfect Star Heating, Cooling, & Electrical is a locally owned and operated family business serving Alameda & Contra Costa County. We service all makes and models, offering top-quality comfort and energy efficiency solutions. Specializing in Furnace/Heating, Air Conditioning, and Ductless Mini-Split installation, we also provide repair and maintenance for Central HVAC systems, Ductwork, Indoor Air Quality, Electrical Repair & Installation, and Solar Installation. Free estimates are available for HVAC system replacement, new installations, and solar solutions. As a Lennox Premier Dealer, Daikin Comfort Pro, and WellAir Elite dealer, we are Diamond Certified, hold an A+ BBB Rating, and have been voted “The Best Heating & Air Company” and “The Most Community-Minded Company” by The Press in Brentwood, CA for two years. We are also SFGATE’s Best of the Bay Area Heating & A/C Service provider.

"Fast and efficient. Did not try to sell more work needed "

Barbara H on January 2026


Traube Construction Company

5.00(
2
)
Approved Pro

Traube Construction Company

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

Traube Construction Co Inc, is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers interests, and make their concerns the basis of our business.

"The technicians at Traube Construction Company are highly skilled and knowledgeable about HVAC repair. I was impressed by their attention to detail and how they ensured everything was set up perfectly. I would definitely recommend them to anyone needing HVAC services."

Tanya S on July 2024

Traube Construction Co Inc, is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers interests, and make their concerns the basis of our business.

"The technicians at Traube Construction Company are highly skilled and knowledgeable about HVAC repair. I was impressed by their attention to detail and how they ensured everything was set up perfectly. I would definitely recommend them to anyone needing HVAC services."

Tanya S on July 2024

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FAQs for electrical wiring or panel upgrade projects in Piedmont, CA

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.

The Piedmont, CA 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.