Mechanical Contractors You Can Trust
Looking for an HVAC contractor in the Chicago area? Look no further than R.J. O’Neil! We’ve been serving Chicagoland since 1926 and have built a reputation for being a reliable and professional contractor. We specialize in quality workmanship and take pride in our long-running history of providing skilled services to our clients. Our markets include residential, commercial, industrial, and municipal projects. We’re dedicated to providing our clients with the best possible service and strive to be the leading contractor in Chicagoland. Contact us today to learn more about how we can help you with your HVAC, plumbing, maintenance, and mechanical construction needs!
Affordable Services in the
Greater Chicagoland Area
HVAC-R
- Commercial Refrigeration
- Chillers
- Boilers
- Rooftop Units
- PTAC/VTAC Units
- Mini Splits
- Make Up Air Units
- Air Handlers
- Duct Cleaning
- Gas Piping Repair & Installation
- Custom Maintenance Agreements
Plumbing
- Backflow Testing & Installation
- Jet Rodding
- Sewer Camera Inspection
- Drain Rodding / Drain Cleaning
- Ejector / Sump Pumps
- Plumbing Fixture Installs
- Water Heater Repair & Installation
- Storage Tanks
- Water Main Break
- Water Piping Repair & Installation
- Custom Maintenance Agreements
Mechanical Construction
R.J. O’Neil strives to continue to build a culture rooted in team-oriented collaboration and can-do attitudes. It is these core values that lay the groundwork for a level of professionalism and excellence that consistently exceeds our customer’s high expectations.
Maintenance Plans
R.J. O’Neil is dedicated to serving the Chicagoland area. Our quality work ethic and long-running history of professional skill is shown throughout our four generations of family owned business.