How Much Does an HVAC System Cost in North Shore IL? (2026 Installed Ranges)
A complete HVAC system replacement in a North Shore IL home typically includes a furnace or air handler, an outdoor AC or heat pump, refrigerant line set, a matched indoor coil, ductwork inspection and sealing, thermostat, and all required permits. Ranges below reflect typical installed costs in Lake and Cook County for 2026 — not parts-only or contractor-only figures. Every Legendary job is flat-rate priced before work begins: the price quoted on-site is the price you pay.
Bands for Lake and Cook County homes — not a quote. Every Legendary job is priced upfront flat-rate after we see the equipment and the home.
| Option | Typical range | Notes |
|---|---|---|
| Standard efficiency system: 80% AFUE furnace + 14 SEER₂ central AC | $7,500–$11,500 | Entry-level replacement. Limited rebate eligibility. Adequate for rental or short-term ownership. |
| High-efficiency system: 96% AFUE furnace + 18 SEER₂ central AC | $10,000–$16,000 | Most common North Shore upgrade. Nicor rebate on furnace + ComEd rebate on AC may stack. Daikin Comfort Pro 12-year registered warranty. |
| Premium variable-speed system: 96% AFUE modulating furnace + 20+ SEER₂ variable AC | $14,000–$20,000 | Quietest, most efficient ducted system available. Best humidity control. Optimal for larger North Shore homes. |
| Dual-fuel hybrid: cold-climate heat pump + 96% AFUE furnace backup | $11,000–$17,000 | ComEd rebate on heat pump may apply. Winnetka Electric customers: verify rebate eligibility with municipal utility. Nicor rebate on furnace component may also apply. |
| All-electric cold-climate heat pump (no gas backup) | $8,000–$13,000 | ComEd rebate may apply. Winnetka Electric customers: verify eligibility. Best for homes without gas service or with solar. |
| Ductless multi-zone mini-split (3–4 zones, whole home) | $14,000–$22,000 | No ductwork required. Higher per-zone cost than ducted; eliminates duct losses. ComEd rebates may apply on heat-pump models. |
What changes the price
- System type: gas furnace + AC, heat pump, or dual-fuel hybrid
- Efficiency rating (SEER₂, AFUE): higher efficiency = higher equipment cost, lower utility bills
- Home size and tonnage required: most North Shore homes need 2.5–4 tons of AC capacity
- Ductwork condition: significant duct leakage or damage adds $500–$3,000 in duct work
- Refrigerant transition: R-454B (A2L) equipment may affect line set compatibility costs
- Permit fees: $100–$250 for mechanical permits in North Shore municipalities (included in Legendary's flat-rate quotes)
- ComEd and Nicor rebates: can reduce net cost $150–$500+ depending on equipment and program year
- Winnetka Electric customers: ComEd rebate programs do not apply in Winnetka's municipal utility territory
FAQs
- What is included in an HVAC system replacement quote from Legendary?
- Legendary's flat-rate quotes include equipment (furnace/air handler, outdoor unit, matched coil), refrigerant line set assessment, thermostat, electrical disconnect and wiring, all labor, permit fees, and haul-away of the old equipment. There are no surprise add-ons after the quoted price.
- How long does an HVAC system replacement take?
- Most complete system replacements are completed in one day (6–8 hours). Larger homes with complex ductwork or additional electrical work may require two days. Legendary confirms the schedule before installation day.
- Are there financing options for a new HVAC system?
- Yes. Legendary offers financing on system replacements. You receive the flat-rate quoted price regardless of financing — no inflated prices for financed jobs.
- What rebates are available in 2026 for HVAC in North Shore IL?
- Nicor Gas offers rebates for qualifying 96% AFUE furnaces (typically $100–$200). ComEd offers rebates for qualifying high-efficiency central AC and heat pumps (typically $50–$500 depending on efficiency tier). Rebate amounts change annually. Legendary identifies applicable rebates at the time of quote. Winnetka Electric customers must check with the Winnetka municipal utility for heat pump rebates — ComEd rebates do not apply.
- Does Legendary do a load calculation for every replacement?
- Legendary performs Manual J load calculations when there's reason to believe the existing equipment may be mismatched — new additions, replaced windows, finished basements, or prior comfort complaints. For straightforward like-for-like replacements where the home is unchanged, the existing equipment data is verified and confirmed.
Editorial provenance
Content by Legendary Service editorial team
Updated:
Methodology
Published ranges are planning bands. The final scope depends on equipment, access, permits, code requirements, and conditions confirmed during an in-home diagnosis; Legendary Service then provides an upfront flat-rate price.
Comfort, handled — across the North Shore.
Tell us what's happening at your Lake County or Cook County home. You'll get upfront flat-rate pricing, a clear explanation before work begins, and the same above-code standard we'd want in our own homes.
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