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R.J. O'Neil Inc. Mechanical ContractorsHVAC contractor in Montgomery, IL

R.J. O'Neil Inc. Mechanical Contractors is an HVAC contractor at 1125 S Lake St, Montgomery, IL 60538, ranked #45 of 800 HVAC contractors in Montgomery and rated 4.8 from 47 Google reviews. Open 24 hours a day, 7 days a week.

Montgomery, ILUpdated 0 paid placements in any rankingHow we rank

Call (630) 906-1300Website ↗

Key facts

Key facts about R.J. O'Neil Inc. Mechanical Contractors
Address1125 S Lake St, Montgomery, IL 60538Get directions
Phone(630) 906-1300
Websiterjoneil.com
HoursOpen 24 hours, 7 days a week
Google rating4.8 from 47 Google reviews

Trades

Each trade shows the evidence we matched it on.

  • HVACmain tradeGoogle main category
  • Plumbingadditional Google category

Service area

Serves Montgomery and 11 towns within 25 miles: Aurora, Boulder Hill, Oswego, North Aurora, Sugar Grove, Batavia, Yorkville, Warrenville, Geneva, Naperville and Plainfield.

Based in Montgomery, ILView on map

Opening hours

Opening hours for R.J. O'Neil Inc. Mechanical Contractors
DayHours
MondayOpen 24 hours
TuesdayOpen 24 hours
WednesdayOpen 24 hours
ThursdayOpen 24 hours
FridayOpen 24 hours
SaturdayOpen 24 hours
SundayOpen 24 hours
  • Open 24/7
  • Open evenings — no
  • Open Saturdays
  • Open Sundays
  • Emergency service

Typical heating and cooling prices

Typical heating and cooling prices
JobLowTypicalHigh
AC replacementPer system, installed (unit plus labor); typical range of customer-reported jobs. US national range$3,887$5,978$8,073
Furnace replacementPer system, installed; typical range of customer-reported jobs. US national range$2,823$4,814$6,896

Market ranges for the trade, checked October 2026, not a quote from this business. Ask for a written estimate.

Compare nearby HVAC contractors

R.J. O'Neil Inc. Mechanical Contractors compared with nearby businesses
BusinessRankCR ScoreGoogle ratingLicense verifiedSaturdaySundayDistance away
R.J. O'Neil Inc. Mechanical Contractors (this business)—604.8 (47)—YesYes
Doc's HVAC#43604.9 (278)—YesYes10.7 mi
Kustom Heating and Cooling#44605.0 (1,021)—YesYes20.2 mi
Aurora Heating & Cooling#46604.9 (54)—YesYes1.8 mi

See all 800 ranked HVAC contractors in Montgomery

Reviews

ContractorsRanked reviews

No ContractorsRanked reviews yet

Google

4.8from 47 Google reviews

Hired R.J. O'Neil Inc. Mechanical Contractors? Write a review

Questions about R.J. O'Neil Inc. Mechanical Contractors

How is R.J. O'Neil Inc. Mechanical Contractors ranked in Montgomery?

R.J. O'Neil Inc. Mechanical Contractors is ranked #45 of 800 HVAC contractors in Montgomery by CR Score, with 60 out of 100 as of October 2026. The score weighs reputation, credentials, review volume, recency, availability, trade focus, proximity, claimed profile, partnered and ContractorsRanked reviews. No business can pay to change its rank.

What are R.J. O'Neil Inc. Mechanical Contractors’ hours?

R.J. O'Neil Inc. Mechanical Contractors is open 24 hours a day, 7 days a week. Its listed hours are Open 24 hours, 7 days a week. On Saturdays it is open Open 24 hours, and on Sundays Open 24 hours. Hours come from the business listing; holiday hours may differ.

What areas does R.J. O'Neil Inc. Mechanical Contractors serve?

Serves Montgomery and 11 towns within 25 miles: Aurora, Boulder Hill, Oswego, North Aurora, Sugar Grove, Batavia, Yorkville, Warrenville, Geneva, Naperville and Plainfield. The list is based on the business's location and the usual service radius for heating and cooling. Confirm your address is covered when you call.

What do Google reviews say about R.J. O'Neil Inc. Mechanical Contractors?

R.J. O'Neil Inc. Mechanical Contractors has a rating of 4.8 from 47 Google reviews. The CR Score adjusts the star rating for review count, so a high rating from a few reviews counts for less than the same rating from many.

How do I contact R.J. O'Neil Inc. Mechanical Contractors?

Call R.J. O'Neil Inc. Mechanical Contractors on (630) 906-1300. The business is at 1125 S Lake St, Montgomery, IL 60538. Its website is linked in the key facts on this page. Ask for a written estimate before any work starts.

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Claiming is free. Correct your hours, trades and service area. The CR Score is recalculated from corrected data; payment never changes it.

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