Serving Damascus, MD and surrounding areas
Approved
Super Service Award Winner
In business since 2010
Free estimates
Customers say: Quality work
"Expert whole house generator Installation at a good price."

*The Angi rating for Generator Install companies in Damascus, MD is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Generator Install needs.
*The HomeAdvisor rating for Generator Install companies in Damascus, MD is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Generator Install needs.
Last update on November 20, 2025
Serving Damascus, MD and surrounding areas
Approved
Super Service Award Winner
In business since 2010
Free estimates
Customers say: Quality work
"Expert whole house generator Installation at a good price."

Serving Damascus, MD and surrounding areas
Approved (Corporate)
In business since 1970
Free estimates
Warranties offered
"I’m back again to write another stellar review for GAC. Last year they replaced our HVAC system; this year we circled back and had them install a home generator. This was a long and drawn out process due to the various approvals needed from Montgomery County as well as coordination with Washington Gas (which ended up not just being a simple sign off but necessitating an additional, expensive upgrade to the gas line from the street to our home). Nevertheless, GAC did a fantastic job shepherding this process over the 6+ months of waiting on stakeholders, and they were also maximally accommodating to our family’s significant constraints on time and availability (due to health concerns related to a medically fragile family member). A special kudos to Sandy M, GAC’s master electrician, who took it on personally to ensure we were taken care of all throughout this process, going above and beyond with phone calls, text messages, personal visits, etc. on behalf of my family, I want to thank GAC and am giving top marks across the board for this effort which was complex , lengthy, and ultimately successful."


Serving Damascus, MD and surrounding areas
Approved
In business since 2004
Free estimates
Credit card accepted
"He found an electrical problem that Potomac Edison arrived to do a emergency repair. It was a fire hazard. So thankful he found the problem and did an excellent install with our Generator."





+6

Serving Damascus, MD and surrounding areas
Approved
In business since 2011
Free estimates
Emergency services offered
"Your technician that came out to do a yearly maintenance inspection on my generator was very nice and knowledgeable. He arrived actually earlier than expected and went right to work. I would recommend your company to anyone and it was so nice to deal with someone who acted like they enjoyed their work and wanted to please. Thank you!"





+8
Serving Damascus, MD and surrounding areas
Approved
In business since 2022
Free estimates
Credit card accepted
#1 Customer satisfaction is what determines our success, which is why we take a hands-on approach. You'll notice that we're particularly focused on the principles of quality workmanship, timely completion, competitive pricing and integrity in all our business dealings. We combine knowledge and research with our extensive practical experience to ensure a specialized approach for your project needs. Contact us today for a fair and accurate estimate of your project. We look forward to adding you to our long and growing list of happy customers.\n

Serving Damascus, MD and surrounding areas
Approved
In business since 2014
Free estimates
Emergency services offered
"David Harris and the team at One Source are true experts in the field and care more about really helping their customers with what they actually need than just a pay day. I would never use anyone else as I very much trust them."





+26

Serving Damascus, MD and surrounding areas
Approved
In business since 2015
Free estimates
Emergency services offered
We are committed to excellence in every aspect of our business. \nWe uphold a standard of integrity bound by fairness, honesty and \npersonal responsibility. Our distinction is the quality of service \nwe bring to our customers. Accurate knowledge of our trade combined \nwith ability is what makes us true professionals. Above all, we are \nwatchful of our customers interests, and make their concerns the \nbasis of our business.


Serving Damascus, MD and surrounding areas
Approved
In business since 2018
Credit card accepted
Customers say: Quick response
We take great pride in our experience, 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 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.





+127
Serving Damascus, MD and surrounding areas
Approved
In business since 2021
Free estimates
Credit card accepted
Calvert Generator 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.\n

Serving Damascus, MD and surrounding areas
Approved
In business since 1989
Free estimates
Emergency services offered
Horizon Services (MD), LLC, is the regions largest and most well respected plumbing, heating and air conditioning company, with nearly 600 employees serving tens of thousands of homeowners throughout Delaware, Southeastern Pennsylvania, Southern New Jersey and Northeastern Maryland. After a quarter of a century in business, Horizon Services (MD), LLC, remains fully committed to setting the industry standard for customer service, installation and focusing on things that are important to busy homeowners.
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