4.6 
704 *The Angi rating for Electrical Service companies in Diamond Bar, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Electrical Service needs.
*The HomeAdvisor rating for Electrical Service companies in Diamond Bar, CA is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Electrical Service needs.
Last update on July 11, 2025
Serving Diamond Bar, CA and surrounding areas
Approved
In business since 1968
Free estimates
Warranties offered
"We were very pleased with the services that Garafano Electric provided. I would recommend them for any electrical needs you might have!"
Serving Diamond Bar, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2024
Free estimates
Emergency services offered
"The Technician (George) that came over was in time. He was very helpful in identifying the concerns we had with the appliances electrical outlets and circuit breakers. If we need any more electrical work done on our house we will be searching out to JK Flores for there service."
+28
Serving Diamond Bar, CA and surrounding areas
Approved
In business since 2007
Free estimates
Emergency services offered
"Nice guys. Very professional. Installed two pendant lights over the kitchen island to existing electrical boxes. They were quick and friendly and are sure we were happy with how it all looked. Thanks!"
Serving Diamond Bar, CA and surrounding areas
Approved
In business since 1996
Free estimates
Emergency services offered
"Installing the Quite Cool whole house fan was a great investment. Tested it over the weekend and it performed just as advertised. Should save plenty on AC operating costs. Martin was professional and answered all questions. Dependable and will use him for any electrical issues that may come up later."
+15
Serving Diamond Bar, CA and surrounding areas
Approved
In business since 1974
Free estimates
Warranties offered
"The crew came on time and did an excellent job installing electrical wiring and installing the ceiling fan. Highly recommended!"
Serving Diamond Bar, CA and surrounding areas
Approved
In business since 2020
Free estimates
Emergency services offered
"Excellent work completed in a timely manner at a fair price. Replaced old Zinsco electrical panel with Square D panel. Highly recommend."
Serving Diamond Bar, CA and surrounding areas
Approved
In business since 1993
Free estimates
Emergency services offered
"Sharp Electric LLC is the best"
Serving Diamond Bar, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2019
Free estimates
Emergency services offered
"Excellent. A very efficient and well done job. Eduardo was always on time. The job was finished when he said it would be. I recommend him and I will hire Alset Electric company for my next electrical project ."
+62
Serving Diamond Bar, CA and surrounding areas
Approved
Emergency services offered
Warranties offered
Offers commercial services
"Sergio and his team are truly amazing. We had our electrical panel replaced along with some other electrical work done. He is reliable and does excellent work."
+1
Serving Diamond Bar, CA and surrounding areas
Approved
Super Service Award Winner
In business since 2014
Free estimates
Credit card accepted
"I needed a fan installed in my garage and Quinn came and installed my fan. He also changed out some plugs that were bad. He did a great job and I would definitely call Quality Electric again."
From average costs to expert advice, get all the answers you need to get your job done.
Upgrading your electrical panel boosts safety, supports modern appliances, and may increase home value. Learn electrical box replacement costs in Los Angeles.
The cost to install a 240-volt outlet in Los Angeles, CA varies depending on the amperage and the home’s current wiring conditions. Use this guide to budget for your next project.
Looking to size up your electrical system to cover higher usage and improve efficiency? Use this guide to see the cost to upgrade an electrical panel in Los Angeles, CA.
Nervous about what an electrical inspection might reveal about your new home? Following our home inspection electrical checklist can help ease your mind.
Learn about the red flags that signal it’s time to get an electrical inspection, what it will cover, and what issues can fail these important safety checks.
Nearly every electrical wire in your home has a different purpose. This article will cover the types of electrical wires, what they’re for, and how you can tell them apart.
