• 281-671-8059
  • Year Established: 2003
  • Homeowners Served: 40,000+
  • Number of Employees: 300
  • License Number(s): M-20628
"Abacus Plumbing, Air Conditioning & Electrical provides award-winning plumbing, A/C, and heating services to the greater Houston area. Abacus Plumbing was founded by Master Plumber, Alan O'Neill, in 2003, with one goal in mind: win lifetime customers through superior customer service. Our motto: You can count on us!"

Alan O'Neill, President & CEO
Principal Owners / Key Managers
Alan O'Neill, President & CEO
Molly McGuirk, General Manager
Tony Patino, Plumbing Operations Manager
Lance Ellison, HVAC Operations Manager
Steve Piatt, Electrical Manager
Five Star Guarantee
We stand behind every Five Star Rated company with Our Guarantee. We've done the research for you and identified the best home service pros in your neighborhood.
Homeowner Reviews

“They got the job done.”

“Pretty much everything else was perfect!”

“The guys were knowledgable and fast. They did a really good job. The crew treated it like it was their own home. The job was very professional looking and we haven't had any issues since. no problems since. They got the job done and did it right for the time.”

“We were satisfied with the work.”

“I would like to recognize Brandon for his exceptional service.”

“Andres was exceptional.”

“I would like to recognize Ricardo for his exceptional service!”

“I was most satisfied with their knowledge of what they were doing.”

“Every person I have encountered has been really good.”

“I would like to recognize the person that did the service and his manager, Leonard Rogers for exceptional service!”

“The communication exceeded my expectations. They sent an email that had a photo of the technician and kept me up to date, so I always knew when to expect them and if they were running late or anything like that.”

“Very professional and experienced”

“Technicians are very knowledgeable, thorough and polite in answering my questions. I am also kept well informed who will arrive and when.”

“They did a good job.”

“The water heater install exceeded my expectations.”

“I was satisfied with the fairness of the job. He did a great job.”

“They met/exceeded expectations in all areas.”

“They did what they said they were going to do.”

“The quickness of the solution and the response met my expectations.”

“I would like to recognize the technician for his exceptional service! He kept us in the loop, let us know what was going on during the repair, was professional, and followed COVID-19 protocols. He nailed it out of the park!”

“I can't remember his name, but the plumber that did the work was a very good plumber.”

“I have had a lot of trouble with the AC in my home for 15 years. I have had it replaced for the third time now. This is finally the way the AC is supposed to work. They did a very professional job. They left everything clean upon leaving. I wouldn't want to go with anyone else now. I have had trouble with several HVAC companies. This is the first one I am overly satisfied with in all aspects.”

“The technician that came out was very good.”

“I needed them out right away and they were able to come, so they met/exceeded my expectations with their timeliness.”

“I would like to recognize Mario for his exceptional service.”

“All three of them were fine, they did a good job.”

“They got the job done, they met my expectations.”

“They were very efficient, on time and very customer friendly.”

“They were very good, very professional and very helpful. I trust their service and know if I have an issue they'll be right here to take care of it.”

“The service was done long ago, I can't remember that young man's name, but he did a great job.”

“The plumber went to a lot of effort to get the part installed before the end of the day. He had to go pick it up and come back.”

“They are responsive. They got it done fast.”

“I would like to recognize Chris for his exceptional service.”

“Darryl provided exceptional service.”

“Each one.”

“I would like to recognize the technician.”

“Yes.”

“The electrician that did all the work, was extremely courteous, knowledgeable, and now I feel safe that my problems were resolved.”

“Annual maintenance was being done.”

“Always professional and friendly, always do quallity work.”

“Very dependable service with a friendly support staff.”

“I would like to recognize Ryan Finn.”

“Not only were they professional, punctual and clean, they were also kind and thoughtful in squeezing me in when I had an emergency.”

“Andres”

“Abacus employees are always professional and knowledgeable. I have been very happy with their work!”

“The quality of time done and the amount of time to complete the jobs were outstanding.”

“Honesty and Reliability.... As long as they stay that way and don't try to sell me on something I really don't really need. People can't afford things that are not necessary so they shouldn't be led to believe they need something when they don't. I understand that you need to try to upsale to keep your business but please just suggest it... don't make someone feel like it is something they have to do.”

“I would like to recognize Jarrod, the plumber. I always ask for him. He is amazing.”

“They have exceeded all of my expectations every time we have used them.”

“The communication and text messaging exceeded my expectations.”

“Abacus Plumbing, Air Conditioning & Electrical did a good job.”

“They met and exceeded my expectations in all areas.”

  • 281-671-8059
  • Year Established: 2003
  • Homeowners Served: 40,000+
  • Number of Employees: 300
  • License Number(s): M-20628
"Abacus Plumbing, Air Conditioning & Electrical provides award-winning plumbing, A/C, and heating services to the greater Houston area. Abacus Plumbing was founded by Master Plumber, Alan O'Neill, in 2003, with one goal in mind: win lifetime customers through superior customer service. Our motto: You can count on us!"

Alan O'Neill, President & CEO
Principal Owners / Key Managers
Alan O'Neill, President & CEO
Molly McGuirk, General Manager
Tony Patino, Plumbing Operations Manager
Lance Ellison, HVAC Operations Manager
Steve Piatt, Electrical Manager
Top Company Features
  • Five Star Guarantee
  • Licensed
  • General Liability Insurance
  • Workers' Compensation Insurance
Services Offered
Plumbing repairs and installation; water heaters (tank and tankless); drain, pipe, and sewer repairs and installation; air conditioning and heating repairs and installation; air and water filtration systems; electrical
Insurance
General Liability & Workers' Compensation
Warranties / Guarantees
Up to 2 years on repairs for members
Up to 15 years on water heaters
Up to 10 years on sewer replacement
Lifetime warranty on select systems
100% customer satisfaction guarantee
Recognitions
BBB Awards: 2006, 2007, 2008, 2009*, 2010, 2011, 2014*, 2016*, 2017, 2018*, 2019*, and 2020 (*Pinnacle Award Recipient)