4.5 
1.2k+ *The Angi rating for Electrical Service companies in Johnstown, CO 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 Johnstown, CO 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 October 13, 2025
Serving Johnstown, CO and surrounding areas
Approved
In business since 2005
Free estimates
Emergency services offered
"Very polite, got the job done quick and communicated when beeded"
+7
Serving Johnstown, CO and surrounding areas
Approved
In business since 2010
Free estimates
Warranties offered
"The Diagnostic Guys are our go to for anything electrical. They have done great work updating our light fixtures, adding new lighting (indoor and outdoor) and adding outlets. They are always courteous, prompt and meticulous about the details. Couldn’t be happier with the services they’ve provided for us!"
+11
Serving Johnstown, CO and surrounding areas
Approved
In business since 2016
Customers say: Quick response
"jt was a very comfortable process for me. I had my service panel brought up to code and increase the amps. I had 3 estimates and Cameron was below the closes bid by about $1000.00. it was a very good experience and I will use him again for any other electrical needs as they arise."
Serving Johnstown, CO and surrounding areas
Approved
In business since 2015
Free estimates
Credit card accepted
"Warren was thorough, fast and personable! GREAT experience with Wintewrhawk Electric!"
Serving Johnstown, CO and surrounding areas
Approved
In business since 1983
Free estimates
Credit card accepted
"Jim was friendly and knows what he was doing. Very professional."
Serving Johnstown, CO and surrounding areas
Approved
In business since 2017
Free estimates
Emergency services offered
"They were awesome! Robert and his team were SO fast, nice, and professional. Will 100% hire again for any and all electrical needs."
+12
Serving Johnstown, CO and surrounding areas
Approved (Corporate)
In business since 1996
Free estimates
Emergency services offered
"Excellent service as always . Ben is the best. Looking forward to the upgraded electrical panel"
+1
Serving Johnstown, CO and surrounding areas
Approved
Super Service Award Winner
In business since 2024
Free estimates
Small jobs welcome
"My husband with Alzheimer’s can usually change a light switch but while doing the one in the bathroom couldn’t get it. I put an urgent message on Angie’s list and Terry from Zap electric gave me a call in a few minutes. He came and fixed the switch in 20 minutes. He was knowledgeable and so nice. He gave us a senior discount. A bathroom light is a must and he saved me that day. Please call him of you need any electrical!"
Serving Johnstown, CO and surrounding areas
Approved
In business since 2024
Free estimates
Emergency services offered
"Steadfast electric was professional and efficient. Lucas found a way to get my small project finished with zero drywall holes. Thank you steadfast electric."
Serving Johnstown, CO and surrounding areas
Approved
In business since 2025
Free estimates
Warranties offered
DN ELECTRIC LTD proudly serves its customers with pride, integrity and attention to the details that matter most to you. This is one of the many things that sets us apart from the rest. We are locally owned and operated. Give us a call today! \n
+1
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