R.J. O'Neil Inc. Mechanical Contractors
R.J. O'Neil Inc. Mechanical Contractors is a HVAC provider serving Montgomery, IL. Rated 4.7★ with 50 Google reviews. See services, review signals, and request a quote.
HVACMontgomery, IL
On this page
Company overview
- TradeHVAC
- Service areaMontgomery, IL
- Google rating4.7★ (50 reviews)
- Phone(630) 906-1300
- Address1125 S Lake St, Montgomery, IL 60538, USA
Services offered
- installation
- repair
- emergency
Photos
Photos from R.J. O'Neil Inc. Mechanical Contractors, Hi5 Vacations
What customers say
“I’ve been using this company for over 11 years, and they continue to exceed my expectations every single time! Recently, our AC stopped working, and they sent a technician out right away. He was incre…”
“I used RJ O'Neil for the first time and was beyond impressed! I was given options of furnace repair, replacement and furnace and a/c replacement. As a woman it is an intimidating process to have home …”
“We can’t thank RJ O’Neil enough! Our AC went out in the middle of a heat wave, and with a newborn at home we were really worried. They responded immediately, showed up quickly, and had our unit fixed …”
Key highlights
Strengths
- Highly rated (4.7★ average)
Things to ask
- Confirm availability for your area and timeline
- Ask about warranty terms on parts and labor
- Request a written estimate before work begins
- Ask about payment plans or financing
Explore nearby research
Frequently Asked Questions
What services does R.J. O'Neil Inc. Mechanical Contractors offer?
R.J. O'Neil Inc. Mechanical Contractors provides: installation, repair, emergency. They serve residential and commercial customers in Montgomery, IL.
What is R.J. O'Neil Inc. Mechanical Contractors's rating?
R.J. O'Neil Inc. Mechanical Contractors has a 4.7 out of 5 star rating based on 50 Google reviews.
Is this company licensed in Illinois?
All listed providers have a verified Illinois contractor license at time of publication. You can verify on the Illinois Department of Financial and Professional Regulation (state business registration) plus municipal HVAC licensing (e.g. City of Chicago Department of Buildings) lookup at https://online-dfpr.micropact.com/Lookup/LicenseLookup.aspx.
Does R.J. O'Neil Inc. Mechanical Contractors offer emergency service?
Contact them directly to ask about emergency availability and after-hours service.
How do I request a quote?
Use the CTA below to submit your ZIP. You can message this company alongside two or three other local pros for easy comparison.
Licensing verified 2026-04-22. Reviews refreshed 2026-04-22.
Licensing data: Illinois Department of Financial and Professional Regulation (state business registration) plus municipal HVAC licensing (e.g. City of Chicago Department of Buildings) · Company data: verified business records + Google Business profile
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