Abacus Plumbing, Air Conditioning & Electrical
2nd year as a Best Pick
certified company
Based on 646 reviews
Our Certification Process
Best Pick Guarantee
Verified License(s)
Verified General Liability Ins.
2nd year as a Best Pick Call
"You can count on us. We believe in being there for our customers, which is why our office is open seven days a week and until 8:00 PM Monday through Friday. We also provide 24/7 service to all of our customers."

Alan O'Neill | CEO
Company Information
Services Offered
Abacus specializes in rewiring and the repair and installation of electrical panels, surge and lightning protection, indoor and outdoor lighting, LED lighting, recessed lighting, ceiling fans, GFCI outlets, switches, dimmers, and other residential electrical needs.
The company offers a 100 percent customer satisfaction guarantee.
Company History
Abacus was founded in 2003. CEO Alan O'Neill has 39 years of plumbing experience.
The company was awarded the Best of Readers' Choice Award by Living Magazine.
Employee Information
Employees wear uniforms, drive marked vehicles, and undergo background checks and drug testing.
TECL 30557
Areas Served
West Houston Suburbs, North Houston Suburbs, Fort Bend County & Southwest Houston, The Heights/Midtown
A selection of 646 homeowner reviews:
“I had an initial problem with the initial installation and received no satisfaction when I spoke to the tech responsible for the installation. After speaking to an office staff member the complaint was fixed to my satisfaction.”
“Courteous service top to bottom. Do good work.”
“They did a very good job but did forget a few things that they needed to come back to do. The first one was not a big deal but the second one was they did not cap off gas line in attic. Would not have known if A/C service would not have told me. I don't climb in my attic. So far those are the only things I have been aware of at this time.”
“He was very clean, and had the best customer service. Overall he did a good job. The caulking could have been done better.”
“Great work overall and advised on how to get cleaner more efficient air flow in the house which I will be using soon.”
“Cesar was very professional. I only wish I had been able to see the installation to the end as I had to leave before he finished.”
“Very professional organization. They have very good customer service department which follows up on appointments. The service technicians are knowledgeable and courteous. I am very pleased with their work and attitude.”
“Great customer service. However, the technical experience from those who came out was poor.”
“Abacus service representatives are extremely professional and competent.”
“Excellent work and customer service! Would absolutely use them again if needed in the future.”
“They're spectacular. They were prompt and on time. They did everything that they said they were going to do, and then they brought in their electrical team and replaced the junction box in the back. They cleaned up their mess, so you couldn't get any better. I would recommend them based on my experience. They're A+.”
“They have wonderful customer service. I appreciate them. I'd give them an A grade.”
“The quality of work was good. I would give the company an A+.”
“We've got a service contract with them for the town house that we're going to rent. They checked out the electrical system, they did an upgrade of the box, and they checked out the HVAC. I have not had to do the water system yet, but they seemed to be very professional, and they did very good work. I was aware of them through word of mouth, general positive feedback, and various things. They're an A-grade company.”
“They were on time, and they did what they said they were going to do with no surprises. They did plumbing, electrical, and HVAC work. I chose them because they could address all of the items with one company. They're an A-rated company.”
“They did some electrical work, and they put two electrical outlets in a closet. My husband had heard good things about them. They gave us a bid, and then they were able to quickly do the job that we asked them to do. They got it done in the time period that they said they would, and they cleaned up and left it in working order, which is what we needed, so they did good work. I'd give them an A.”
“They have always done good work. They are efficient, clean, and neat, and they just take care of business. They've done mostly electrical work for me at my house. I have a home warranty, but the home warranty only covers a certain amount of things. I've mostly used the electrical end of the business. The company gets an A from me. I chose them because of one of their employees. He's over the electrical, and he used to have his own company. I used him when he had his own company, so when he told me he was going to be going on with them, I continued using him, and I've always been pleased.”
“Everything was good—100 percent good.”
“I like a lot of things about them. Their pricing is up front. They bring their iPad with the prices on it, so it's not like someone's pulling a number out of a hat, and I like that. I like that they're on time. I like that he'll tell me what he can fix, and he'll tell me what he doesn't have to fix—I like that very much. They're very professional, and I use them over and over. They've done a couple of things for me—one was electrical work, and the other was plumbing work for the shower. They changed some fixtures for me, and they've also done electrical work—running a line to my A/C that it required. It was really good because another air conditioner guy had been out there and didn't even tell me that it was missing something; it was missing a breaker that it should have had. So I got the Abacus guys out here, and they finally fixed the problem, because the problem had been happening over and over. They came out and fixed the problem. It was a good experience. I'd grade them as an A.”