R J O'Neil: Montgomery, IL HVAC, Plumbing & Mechanical Experts

Since 1926, R J O'Neil has been a trusted mechanical service partner for homes and businesses in Montgomery, IL and across the region. This woman-owned and minority-owned company provides 24/7 emergency service, handling everything from HVAC installations to plumbing repairs for residential, commercial, industrial, and municipal clients. Their team brings deep expertise to every job, ensuring systems run reliably through every season.

Business Overview

R J O'Neil operates around the clock, offering peace of mind with 24/7 emergency repairs. Whether it's a furnace failure on a cold Montgomery night or a commercial plumbing issue, their skilled employees are ready to respond. They serve both homeowners and large-scale commercial operations, adapting their approach to fit each client's specific needs.

Key Services

The team at R J O'Neil in Montgomery, IL handles a wide range of mechanical needs. Their services are grouped into a few key areas:

• Heating & Cooling: Full HVAC installation, replacement, repair, and maintenance to keep indoor temperatures comfortable year-round.
• Plumbing & Water Systems: Installation and repair for water heaters, pipes, drains, faucets, sump pumps, toilets, showers, and bathtubs.
• Critical Systems: Backflow services, gas line work, sewer lines, and hot water recirculation pumps.
• Preventive Care: Plumbing inspections and HVAC maintenance to prevent costly surprises.

Areas Served

R J O'Neil serves a wide area around Montgomery, IL, including Aurora, DeKalb, Oswego, Lockport, Geneva, Yorkville, Sycamore, North Aurora, and many surrounding towns like Sandwich, Hinckley, and Big Rock. Their long history in the Fox Valley and Northern Illinois means they understand the local housing styles, common building materials, and the specific climate challenges that affect mechanical systems here.

Company History

Founded in 1926, R J O'Neil has built a solid reputation on a "can-do" team attitude. The company is woman-owned and operated, carrying forward a nearly century-long legacy of service. They take pride in constantly improving their processes and services to meet the evolving needs of the municipal, industrial, commercial, and residential markets they serve.

Leadership

The owner, who started as an Administrative Assistant in 2009, leads with a focus on relationships. She believes in solving customer problems as if they were her own and building teams that operate like a family. At R J O'Neil, titles are less important than collaboration; everyone works together to support customers and develop lasting careers. This culture of open feedback and mutual support defines how the company operates daily.

Specialties & Highlights

• Woman-Owned Business Enterprise (WBE) and Minority-Owned Business Enterprise (MBE) certified.
• Provides services across four major market types: municipal, industrial, commercial, and residential.
• Offers a single, reliable source for HVAC-R, plumbing, and mechanical needs.
• Operates with a proven process focused on long-term customer satisfaction.
• Maintains 24/7 availability for emergency repairs and support.

Why Locals Choose R J O'Neil

Homeowners and business managers in Montgomery, IL and the surrounding communities choose R J O'Neil for their deep local experience and reliable service. Their nearly 100-year presence in the area speaks to a commitment that lasts. They combine extensive trade expertise with a genuine, relationship-driven approach, treating every customer's problem with attention and care. For mechanical systems that need to work right, R J O'Neil provides the trusted solution.