HVAC Replacement Cost in Green Bay, WI (2026)
Updated October 2026 · Green Bay, WI · index 1.04
How much does a new HVAC system cost in Green Bay? For a 3-ton system with central AC + gas furnace, homeowners in Green Bay, WI pay about $10,900 on average, and most quotes land between $7,450 and $14,400 — $2,482 to $4,791 per ton. The price covers removing the old system, the new outdoor and indoor equipment, a new line set, electrical and condensate connections, the thermostat, the permit, start-up and commissioning.
The HVAC replacement price in Green Bay runs 4% above the U.S. average: construction labor in the Green Bay area runs 7% above the national mean, materials sit at the national level. The same job averages $10,500 nationally and about $10,900 at the Wisconsin statewide index.
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HVAC replacement price in Green Bay by system type
What a 3-ton system costs in Green Bay with each system type, installed:
| Option | Average · range |
|---|---|
| Central AC + gas furnacesplit AC, matched coil and an 80,000 BTU furnace$3,636 per ton | $10,900$7,450 – $14,400 |
| Heat pump + air handlerall-electric split heat pump, no furnace$3,372 per ton | $10,100$6,800 – $13,400 |
| Cold-climate heat pump + air handlervariable-speed heat pump rated for deep winter$3,853 per ton | $11,600$7,800 – $15,300 |
The least expensive option in Green Bay is heat pump + air handler, at about $10,100; cold-climate heat pump + air handler averages $11,600, 1.1 times as much.
Cost to replace an HVAC system in Green Bay by size
With central AC + gas furnace, priced for Green Bay, WI:
| Size | Average · range |
|---|---|
| A 2-ton system$4,733 per ton | $9,450$6,450 – $12,500 |
| A 3-ton system$3,636 per ton | $10,900$7,450 – $14,400 |
| A 4-ton system$3,088 per ton | $12,400$8,450 – $16,300 |
Some costs stay the same whatever the size — load calculation and equipment sizing, mechanical permit and inspection, old system removed, refrigerant recovered — so a bigger job costs less per unit: $3,088 per ton for a 4-ton system against $4,733 for a 2-ton system.
What an HVAC replacement in Green Bay includes
Line by line, the $10,900 average for a 3-ton system breaks down like this: 32% labor, 65% materials and equipment, and $280 in permit fees passed through at cost.
| Line | Low – high |
|---|---|
| Load calculation and equipment sizing | $80 – $240 |
| Mechanical permit and inspection | $150 – $400 |
| Old system removed, refrigerant recovered | $360 – $630 |
| Gas furnace (about 80,000 BTU) | $1,600 – $2,850 |
| Outdoor unit, set on a new pad | $2,350 – $4,450 |
| Matched indoor coil | $1,050 – $2,200 |
| New refrigerant line set (25 ft) | $400 – $630 |
| Disconnect, whip and thermostat wire | $220 – $360 |
| Condensate drain and safety switch | $120 – $280 |
| Gas connection and furnace venting | $330 – $620 |
| Plenums and transitions to the ducts | $280 – $630 |
| Programmable or smart thermostat | $240 – $440 |
| Evacuation and refrigerant charge | $120 – $240 |
| Start-up and commissioning | $120 – $280 |
| Warranty registration and walk-through | $60 – $140 |
Each line is the price book's U.S. rate for that step, scaled by 0.76 to the installed price published sources give for the whole job (see how these prices are built), times Green Bay's index of 1.04; permit fees are not scaled.
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What affects HVAC replacement prices in Green Bay
Labor and materials in Green Bay
Construction wages in the Green Bay metro run 6% above the U.S. mean (BLS, May 2025), and specialty-contractor pay in the city's county moves that up by 1%, to 7% above the national mean. Materials in the area's ZIP codes price right at the national average. Together they give Green Bay a construction cost index of 1.04.
Where Green Bay sits in Wisconsin
Green Bay is the 4th most expensive of the 4 Wisconsin cities in our index, against a statewide index of 1.04. Madison is the dearest at 1.09; no Wisconsin city in it costs less.
Against the rest of the country
Of the 306 U.S. cities in JobFlex's index, Green Bay ranks 123rd from the most expensive. The job that averages $10,900 here averages $10,500 at the national rate.
Climate a system is sized for in Wisconsin
Contractors size equipment for the local design temperatures. Across Wisconsin's counties the median is about 88°F on a hot summer day and -9°F on a cold winter night (ENERGY STAR county table), and your county can differ. Winters that cold are where a cold-climate heat pump or a furnace earns its price.
Sales tax in Wisconsin
Wisconsin's base state sales tax is 5%, and cities and counties can add their own. How it applies to a home-improvement contract varies, so ask whether a quote includes it. Prices on this page are before tax.
What a Green Bay contractor will ask before quoting
- Job type — new construction, replacement or upgrade — and the evidence for it
- Heating and cooling load for this house (not the old nameplate), tonnage, fuel and refrigerant
- Ducts, line set, circuit, gas line and flue: keep, fix or replace, each with its reason
- Water heater in scope, and whether it shared the old flue
- Panel main amps, free slots and the new equipment's MCA
- Permits, tests and incentives that apply in this state
HVAC replacement cost in other Wisconsin cities
A 3-ton system with central AC + gas furnace averages $10,900 in Green Bay; $11,400 in Madison, $11,300 in Waukesha, $11,300 in Milwaukee.
| City | Average · range |
|---|---|
| Madison, WI5% more | $11,400$7,800 – $15,000 |
| Waukesha, WI4% more | $11,300$7,750 – $14,900 |
| Milwaukee, WI4% more | $11,300$7,750 – $14,900 |
HVAC replacement price in Green Bay: questions
How much does a new HVAC system cost in Green Bay, WI?
About $10,900 for a 3-ton system with central AC + gas furnace, and most Green Bay quotes fall between $7,450 and $14,400. That is 4% above the U.S. average, where the same job averages $10,500.
What is the HVAC price per ton in Green Bay?
$2,482 to $4,791 per ton, about $3,636 on average with central AC + gas furnace. Smaller jobs cost more per unit, because the fixed costs are spread over less.
How much is a 4-ton system in Green Bay?
$8,450 to $16,300, about $12,400 on average, with central AC + gas furnace — $3,088 per ton.
Do you need a permit for HVAC replacement in Green Bay?
Yes — installing HVAC or fuel-burning equipment needs a permit nearly everywhere, Green Bay included. The prices on this page carry $150–$400 for the permit and inspection.
Does the price include sales tax in Wisconsin?
No. The prices here are before tax; Wisconsin's base state rate is 5%, plus any local rate.
What size HVAC system does a house in Green Bay need?
It is worked out with a Manual J load calculation for the house — included in the prices above — not from square footage alone. Here it is run against design temperatures of about 88°F in summer and -9°F in winter (the Wisconsin median).
Other home projects in Green Bay
HVAC replacement cost in Wisconsin
How these prices are built
Every price on this page comes from JobFlex's contractor price book: what a homeowner pays a licensed contractor for each step of the job, as a U.S. national average per unit, with the contractor's overhead and profit included and sales tax left out. The HVAC replacement is priced step by step, then multiplied by Green Bay's construction cost index of 1.04.
Where the price book's steps for an option add up to more than 20% over the installed price a published source gives for the whole job, every step but a permit fee is scaled down to the middle of that range: central AC + gas furnace × 0.76 (HomeCostCalcs 2026: $7,000–$14,000); heat pump + air handler × 0.76, following central AC + gas furnace; cold-climate heat pump + air handler × 0.76, following central AC + gas furnace.
The index weighs local construction wages (BLS Occupational Employment and Wage Statistics, May 2025) at 60% and the area's material prices (Craftsman ZIP-area factors) at 40%. Published indices for Green Bay, each on its own base: HUD 1.05, Craftsman 1.03. Treat any city figure as about ±5%; a contractor's quote for your house is the number to plan with.
Contractors in Green Bay build quotes like these with JobFlex's HVAC estimator.
- HomeCostCalcs 2026: furnace + AC replacement $7,000-$14,000 standard, $10,000-$20,000 high efficiency
- Today's Homeowner 2025: complete HVAC system install $5,000-$12,500