HVAC Chicago: 2026 Replacement Cost Guide
A full HVAC system replacement in Chicago typically runs $4,200 to $9,500 for a furnace or central AC, and $6,500 to $13,500 for a boiler, with un-ducted homes needing mini-split or high-velocity retrofits often landing in a similar or higher range depending on the number of zones. Costs vary by building type, since a Portage Park bungalow with a steam boiler and radiators needs a very different plan than a Hyde Park high-rise condo with central air.
By Jason Green · HVAC · Published September 6, 2026 · Updated September 6, 2026 · 9 min read
furnace and AC replacement costs
A new 90%+ AFUE furnace in Chicago typically costs $4,200 to $8,500 installed, with the higher end reflecting larger homes, two-stage or variable-speed units, and any needed venting changes to route condensing exhaust through a sidewall. Central AC replacement runs a comparable $4,800 to $9,500, and pairing both a furnace and AC replacement at once often saves on labor versus doing them separately.
Homes without existing ductwork, common in Chicago two-flats and greystones, generally cannot add central air without major construction, so ductless mini-split systems ($4,500 to $13,000 depending on zone count) or small-duct high-velocity systems are the practical alternative.
boiler replacement costs
Steam and hot-water boiler replacement in Chicago's older housing stock typically costs $6,500 to $13,500, with the higher end reflecting larger radiator systems, multiple heating zones, or piping updates needed alongside the new boiler. Because many of these systems were installed decades ago, a contractor experienced with steam heat should evaluate the full system, not just the boiler unit itself.
Combination boiler systems that also provide domestic hot water can cost more upfront but simplify mechanical space needs, which matters in tighter Chicago basements.
permits and licensing for replacement projects
Replacing a furnace, boiler, or AC condenser with equipment performing the same function generally goes through the Department of Buildings Express Permit Program, which is faster than a full plan review permit. Projects involving new ductwork, relocated equipment, or added gas lines usually require a standard mechanical permit instead.
Only a City of Chicago licensed HVAC contractor can legally pull either permit type, since Illinois issues no statewide HVAC license. Confirm your contractor's license through the Contractor License Lookup tool on chicago.gov before signing a replacement contract, and make sure the permit fee and type are spelled out in your estimate.
timing your replacement around Chicago seasons
Spring and fall are the best times to schedule a planned furnace, AC, or boiler replacement in Chicago, since contractor schedules are less strained than during the peak summer AC season or the depths of winter heating season. Waiting until a mid-winter breakdown to replace an aging furnace often means paying an emergency rate and taking whichever unit is in stock rather than the one you would have chosen with more lead time.
If your current system is over 15 years old, getting a replacement quote before it fails gives you time to compare bids, check ComEd and Nicor Gas rebate eligibility, and avoid a stressful no-heat emergency during a Chicago cold snap.
Typical cost ranges
| Furnace replacement (90%+ AFUE) | $4,200 - $8,500 |
| Central AC replacement | $4,800 - $9,500 |
| Ductless mini-split system | $4,500 - $13,000 |
| Boiler replacement | $6,500 - $13,500 |
| Combination furnace + AC replacement | $8,500 - $16,500 |
Ranges are general estimates gathered from homeowner-reported quotes, not an offer or a quote for your project.
Common questions
How much does a new furnace cost in Chicago?
A new 90%+ AFUE furnace installed in Chicago typically costs $4,200 to $8,500 depending on size, staging, and any venting changes needed for condensing exhaust.
Can I get central air if my Chicago home has no ductwork?
Adding full ductwork to a two-flat or bungalow is usually impractical, so most homeowners in these buildings install ductless mini-split systems or small-duct high-velocity systems instead.
What permit do I need to replace a furnace in Chicago?
Most like-for-like furnace replacements go through the Department of Buildings Express Permit Program, pulled by a City of Chicago licensed contractor.
How much does boiler replacement cost in Chicago?
Steam or hot-water boiler replacement typically costs $6,500 to $13,500 in Chicago, depending on system size and any needed piping or radiator work.
When is the best time to replace HVAC equipment in Chicago?
Spring and fall offer the most contractor availability and let you compare bids without the pressure of an emergency winter or summer breakdown.
Are there rebates for a new furnace or AC in Chicago?
ComEd offers Home Heating and Cooling discounts and Nicor Gas runs a residential Energy Efficiency Program with rebates on qualifying high-efficiency equipment, so ask your contractor which current rebates apply.
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