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Compare HVAC costs in Mount Prospect, IL (2026)

Not sure which option fits? Here's how every HVAC project compares in Mount Prospect — local 2026 estimates plus what each choice is best for. The most budget-friendly option here is Furnace Replacement (from $4,500).

Furnace ReplacementBest value$4,500 – $8,050

Best for: Lowest upfront cost for homes with gas heatTypically $6,300

Central AC Installation$5,650 – $12,050

Best for: Cooling only — pairs with an existing furnaceTypically $8,850

Heat Pump Installation$7,300 – $13,300

Best for: Most efficient; heats and cools in one systemTypically $10,300

Full HVAC System Replacement$8,950 – $16,550

Best for: Best when both heating and cooling are dueTypically $12,750

Often paired with HVAC in Mount Prospect

Homeowners tackling HVAC frequently budget for these too.

Insulation

Attic Insulation

Typical 2026$1,650 – $6,700

Estimates are localized to Mount Prospect (cold climate) using local labor price levels, climate factors and permit fees. Always confirm with local contractors.