• 281-715-0379
  • Year Established: 2003
  • Homeowners Served: 40,000+
  • Number of Employees: 200
  • License Number(s): TACLB00082488E
"Abacus Plumbing, Air Conditioning & Electrical provides award winning Plumbing, AC 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
Principal Owners / Key Managers
Alan O'Neill, 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

“Alberto, Nicolas, and his team did a great job! I loved their customer service, and they made sure everything was cleaned up before they left. Awesome job!”

“Charles's professionalism and his easygoing demeanor is a true asset to your company. Abacus made a believer out of us, and we will definitely recommend you to our friends and family.”

“Chester was very personable and professional. He explained the problem and repaired it in a timely fashion. I was very satisfied with his work.”

  • 281-715-0379
  • Year Established: 2003
  • Homeowners Served: 40,000+
  • Number of Employees: 200
  • License Number(s): TACLB00082488E
"Abacus Plumbing, Air Conditioning & Electrical provides award winning Plumbing, AC 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
Principal Owners / Key Managers
Alan O'Neill, 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
Air Conditioning & Heating Repairs; Air Conditioning & Heating Installation; Air & Water Filtration Systems; Plumbing Repairs & Installation; Water Heaters (Tank & Tankless); Water Filtration & Purifier; Drain, Pipe & Sewer Repairs & Installation; Electrical
Insurance
General Liability & Workers' Compensation
Warranties / Guarantees
Up to 2-Years on Repairs for Members
Up to 10-Years on HVAC Equipment & 15 Years on Water Heaters
Up to 10-Years on Sewer Replacement
100% Customer Satisfaction Guarantee
Recognitions
Service Awards in Plumbing & Air Conditioning
BBB Awards: 2006, 2007, 2008, 2009*, 2010, 2011, 2014*, 2016*, 2017, 2018*, and 2019* (*Pinnacle Award Recipient)