7 Commercial HVAC Contractors in Oak Lawn, IL
Top-Rated Commercial HVAC Contractors in Oak Lawn
SG Heating & Cooling Services
“Four of four detailed reviews award 5 stars, with two reviewers specifically naming Raymond as the servicing technician. Positive feedback consistently…”
GMI Mechanical Heating & Cooling
“Five-star reviews frequently mention same-day emergency response during extreme weather conditions, with customers praising the company's commitment to rapid…”
All Commercial HVAC Contractors (7 total)
ABC HVAC Services
“All eight detailed reviews award five-star ratings, with Tim named in three accounts as the resolving…”
SkyPower Remodeling
“25 of 28 reviews award five stars, with recurring praise for project communication and timeline adherence.…”
First Star HVAC Inc
“All five reviews award five stars, with four specifically naming Joe as the technician and praising his…”
Commercial HVAC Costs in Oak Lawn
Commercial system pricing in Oak Lawn. Actual costs vary significantly by building size and system type. Request a site-specific quote.
| Service | Low | Average | High |
|---|---|---|---|
Annual maintenance (per rooftop unit) Quarterly inspections | $550 | $1,100 | $2,200 |
Annual contract (small business, < 5K sqft) | $1,100 | $2,750 | $5,500 |
Annual contract (mid-size, 5K-25K sqft) | $3,850 | $7,150 | $11,000 |
Basic rooftop unit replacement | $7,150 | $11,000 | $16,500 |
Small business full system (< 5K sqft) | $8,800 | $17,600 | $27,500 |
Mid-size building (5K-25K sqft) | $27,500 | $55,000 | $88,000 |
Operating cost (per sqft annually) Utility + maintenance | $2 | $4 | $7 |
Prices reflect continental metro averages compiled from published industry cost guides, contractor surveys, and regional labor data. Last updated: April 2026.
Commercial HVAC in Oak Lawn, IL: What to Expect
Oak Lawn sits in the Chicago metropolitan area where winter temperatures drop to average lows of 18 degrees with punishing lake-effect wind chill, while summers push into the mid-80s with sticky humidity. Heating demand consistently outpaces cooling needs, making furnace reliability non-negotiable for local businesses. The area is served by seven Commercial HVAC contractors averaging a 4.8 rating across 431 reviews, with three offering around-the-clock emergency coverage.
Annual maintenance contracts for small commercial spaces under 5,000 square feet typically run $1,100 to $5,500, while mid-size buildings between 5,000 and 25,000 square feet see annual agreements ranging from $3,850 to $11,000. Individual rooftop unit servicing costs between $550 and $2,200 yearly. Illinois does not require statewide HVAC licensing, so contractors operate under local permits, meaning buyers should verify credentials directly with individual firms.
Customer feedback highlights GMI Mechanical Heating & Cooling for same-day emergency arrivals during extreme weather events, with multiple reviewers praising their rapid response commitment. SG Heating & Cooling Services earns consistent five-star mentions for technician Raymond, whom clients specifically call out for thoroughness and punctuality across detailed reviews.