R J O'Neil

A Rich History of Quality Service and Client Satisfaction

Founded in 1926, R.J. O'Neil has earned a well-deserved reputation as one of the most trusted names in mechanical services throughout the Chicagoland area. With a legacy built on quality, integrity, and unwavering customer satisfaction, we have proudly served commercial, industrial, municipal, and residential clients for over nine decades.

Our Expertise

Our team of skilled professionals offers a comprehensive range of services, spanning across:

Plumbing

• Routine maintenance and repairs
• Emergency plumbing services
• Advanced leak detection and repair
• Piping installation and repair
• Water heater services
• Drain cleaning and snake services

HVAC-R

• Installation, maintenance, and repair of all major heating and cooling systems
• Duct cleaning and inspection
• Comprehensive refrigeration services
• Energy-efficient system consultations

Mechanical Construction

• New construction installations and retrofits
• Equipment inspections and maintenance
• Comprehensive project management and consultation

Our Commitment

At R.J. O'Neil, we are driven by a deep-seated commitment to client satisfaction. We are dedicated to:

• Providing personalized and responsive customer service
• Employing highly skilled and certified technicians
• Offering competitive pricing and transparent billing
• Completing projects on time and within budget
• Treating each client with respect and professionalism

What Sets Us Apart?

Beyond our extensive experience and technical expertise, what truly sets us apart is our:

• Can-do attitude: We tackle challenges with a positive and proactive approach, finding creative solutions to even the most complex situations.
• Client-Focused approach: We prioritize open communication, clear explanations, and personalized attention to every client's needs.
• Long-Term commitment: Our focus on building lasting relationships with our clients through exceptional service and results.