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Electrical wiring or panel upgrade pros in Walnut Creek

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

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
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!
We are 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.
"Earle is Great! He took care of getting the permits so I did not have to! Upgrade was done quickly but attention to detail. Waiting for the inspection (not in his control) took a while but we passed with no problems due to his fine work and experience! Will call Earle for our next project! "
Ric K on May 2025
We are 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.
"Earle is Great! He took care of getting the permits so I did not have to! Upgrade was done quickly but attention to detail. Waiting for the inspection (not in his control) took a while but we passed with no problems due to his fine work and experience! Will call Earle for our next project! "
Ric K on May 2025

Golden Bay Electric is dedicated to providing our customers with the best quality work and craftsmanship. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. Our pledge is to create successful relationships with our customers, employees and community by building trust, treating every project with the utmost integrity and exceeding expectations.
"Job was quoted so quickly and was onsite within 90 minutes. I have rarely received such quick service for a small job. Electrician was courteous, clean and professional. No price gouging with this company, they will now be my go to all my electrical needs going forward. Thanks Golden Bay Electric!"
Steve C on March 2025
Golden Bay Electric is dedicated to providing our customers with the best quality work and craftsmanship. We are here to build relationships with our customers and communities and to provide our employees with a great place to work. Our pledge is to create successful relationships with our customers, employees and community by building trust, treating every project with the utmost integrity and exceeding expectations.
"Job was quoted so quickly and was onsite within 90 minutes. I have rarely received such quick service for a small job. Electrician was courteous, clean and professional. No price gouging with this company, they will now be my go to all my electrical needs going forward. Thanks Golden Bay Electric!"
Steve C on March 2025

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.
"I am so happy we chose Perfect Star to install a new HVAC system. From start to finish, this company is top notch. The sales person, Gilbert, was honest, trustworthy friendly and professional. His quote was competitive and fair. When the team arrive to install the new system, they were absolutely the most professional team we have ever employed for construction type work. The technicians were Jesus G, JT and Tyler. Each one was outstanding. They were knowledgeable, detailed, respectful of our house, and polite. They cleaned up everything after they finished, ensuring the house was returned to its original state. We received estimates from five HVAC companies. The Perfect Star rep Gilbert gave us confidence in the company’s ability to deliver excellent service. He offered a great package, and we wanted to support a local business. They donate to many local charities, and that was a big plus too. I highly recommend Perfect Star. "
Chris M on August 2025
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.
"I am so happy we chose Perfect Star to install a new HVAC system. From start to finish, this company is top notch. The sales person, Gilbert, was honest, trustworthy friendly and professional. His quote was competitive and fair. When the team arrive to install the new system, they were absolutely the most professional team we have ever employed for construction type work. The technicians were Jesus G, JT and Tyler. Each one was outstanding. They were knowledgeable, detailed, respectful of our house, and polite. They cleaned up everything after they finished, ensuring the house was returned to its original state. We received estimates from five HVAC companies. The Perfect Star rep Gilbert gave us confidence in the company’s ability to deliver excellent service. He offered a great package, and we wanted to support a local business. They donate to many local charities, and that was a big plus too. I highly recommend Perfect Star. "
Chris M on August 2025

Here at Five-O-Electric, we have over 40 years of experience and we take great pride in our expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from the 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. Give Five-O-Electric a call today, we look forward to working with you!
Here at Five-O-Electric, we have over 40 years of experience and we take great pride in our expertise, quality, and customer service that we provide to meet the consumer's needs. It is our mission to provide excellent workmanship and complete customer satisfaction from the 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. Give Five-O-Electric a call today, we look forward to working with you!

Here is how all of your fear and risk of being cheated with your electrical work vanishes with Five Or Free Electrical Solutions: We make 5 Promises up front to you that if we do not keep, your electrical work is done FREE. You pay nothing. Period. What 5 Promises? 1) Your Electrical Work Is Completed To Your Satisfaction 2) Your Home Is Left Neat and Tidy, Just As We Found It 3) Your Estimate Stays As Originally Quoted and Agreed Upon 4) Your Appointment Calls and Emails Are Returned Within A Business Day 5) You're Not Made To Wait For A Late Arrival* *If we arrive late without contacting you about our delay before our scheduled appointment, we will complete your electrical work for FREE! On top of our 5 Promises to you, you get 5 solid electrical guarantees from us that ensure not only that you'll never be left with a shabby, incomplete electrical job, but that we'll back for years all our electrical work and any material we use at no cost to you.
"Extremely professional and very reasonably priced. Their response was fast and efficient."
Ron A on October 2020
Here is how all of your fear and risk of being cheated with your electrical work vanishes with Five Or Free Electrical Solutions: We make 5 Promises up front to you that if we do not keep, your electrical work is done FREE. You pay nothing. Period. What 5 Promises? 1) Your Electrical Work Is Completed To Your Satisfaction 2) Your Home Is Left Neat and Tidy, Just As We Found It 3) Your Estimate Stays As Originally Quoted and Agreed Upon 4) Your Appointment Calls and Emails Are Returned Within A Business Day 5) You're Not Made To Wait For A Late Arrival* *If we arrive late without contacting you about our delay before our scheduled appointment, we will complete your electrical work for FREE! On top of our 5 Promises to you, you get 5 solid electrical guarantees from us that ensure not only that you'll never be left with a shabby, incomplete electrical job, but that we'll back for years all our electrical work and any material we use at no cost to you.
"Extremely professional and very reasonably priced. Their response was fast and efficient."
Ron A on October 2020
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"Shahab help update our electrical panel in the garage and move our EV charger to another location. All completed in a day and did a great job. Will use in the future. "
Amir s on July 2025
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"Shahab help update our electrical panel in the garage and move our EV charger to another location. All completed in a day and did a great job. Will use in the future. "
Amir s on July 2025

We pride ourselves on our professionalism, as well as our ability to complete every job to the homeowner's total satisfaction. We never leave a job unfinished, or a homeowner not 100% satisfied with our level of service - Call today!
"I had a great experience working with Voltex. He arrived when he said he would, was respectful of our home and easy to work with. I appreciated the professionalism and electrical expertise. I would hire Voltex again. "
Debi W on July 2025
We pride ourselves on our professionalism, as well as our ability to complete every job to the homeowner's total satisfaction. We never leave a job unfinished, or a homeowner not 100% satisfied with our level of service - Call today!
"I had a great experience working with Voltex. He arrived when he said he would, was respectful of our home and easy to work with. I appreciated the professionalism and electrical expertise. I would hire Voltex again. "
Debi W on July 2025





- Circuit Breaker / Electrical Panel Installation
- Doorbell / Security Camera Installation
- Electrical - Multiple Projects
- Electrical Multi-Item Installation
- Doorbell / Security Camera Repair
- Electrical Multi-Item Repair
- Electrical Item Repair
- Power Outlet Replacement
- Electric Vehicle Charger Installation
- Ceiling / Bath Fan Replacement
- Light Fixture Installation
- Smoke Detector Repair
- Switch Repair
- Doorbell / Security Camera Replacement
- Power Outlet Repair
- Smoke Detector Replacement
- Ceiling / Bath Fan Installation
- Electrical Item Installation
- Electrical Switches, Outlets & Fixtures - Install or Repair
- Switch Installation
- Light Fixture Replacement
- Electrical for Home Addition or Remodel - Install
- Electric Vehicle Charger Repair
- Ceiling / Bath Fan Repair
- Light Fixture - Install
- Lightning Protection - Install or Repair
- Circuit Breaker / Electrical Panel Repair
- Power Outlet Installation
- Light Fixture Repair
- Switch Replacement
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