How Much Does Central AC Installation Cost in Illinois?
Illinois pricing is near the national average. Updated for 2026.
Central AC Installation Pricing in Illinois
In Illinois, the average cost for central ac installation is $6,825 per system, which is 5% higher than the national average of $6,500. Most Illinois residents pay between $3,675 and $12,600.
Illinois has costs that track closely with the national average, though prices can still vary between urban and rural areas within the state.
Central air conditioning installation includes a condenser unit, evaporator coil, refrigerant lines, and thermostat. If you don't have existing ductwork, add $3,000-$7,000 for duct installation.
Illinois vs National Average
What Affects Central AC Installation Cost in Illinois?
System size
1.5-2 ton (1,000 sq ft): $3,500-$6,000. 3 ton (1,500 sq ft): $4,500-$8,000. 4-5 ton (2,500+ sq ft): $6,000-$12,000
Efficiency
14 SEER (standard): $3,500-$6,000. 16 SEER (mid-range): $5,000-$8,000. 20+ SEER (high-eff): $7,000-$12,000
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💡 Tips to Save on Central AC Installation in Illinois
- 1.Install in fall/winter off-season for 10-20% savings
- 2.14-16 SEER units offer the best value for most climates
- 3.Federal tax credits cover 30% of high-efficiency systems (up to $2,000)
- 4.Get 3+ quotes — AC installation pricing varies widely
📈 Central AC Installation in Illinois Cost Trends (2020–2024)
Prices have increased +17.7% over the last 5 years
| Year | National Avg | YoY Change |
|---|---|---|
| 2020 | $5,797 | — |
| 2021 | $6,040 | +4.2% |
| 2022 | $6,433 | +6.5% |
| 2023 | $6,613 | +2.8% |
| 2024 | $6,825 | +3.2% |
Based on national averages adjusted for annual inflation. Actual costs vary by location and project scope.
💬 What Did You Pay?
Real costs reported by homeowners for Central AC Installation in Illinois
Recent Reports
Frequently Asked Questions
How long does central AC last?
15-20 years with regular maintenance. Systems in hot climates (Florida, Arizona) may last 12-15 years due to higher usage. Annual maintenance ($75-$200) extends lifespan significantly.
Central AC Installation Cost in Other States
Related Cost Guides for Illinois
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