How much does HVAC cost in Madison?
By Our research team · Last verified · Methodology
Most Madison homeowners pay $3,550–$7,950 to replace a central AC with a 3-ton system on existing ducts, installed. $5,450 is the typical price; a heat pump runs $5,050–$11,450 and an AC + furnace swap $5,950–$14,650.
How we get this data- Typical
- $5,450
- Low end
- $2,650
- High end
- $11,850
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Get my fair quote →The typical Madison price is $5,450, 12% below the US typical of $6,200.
Madison's price band
Madison is cheaper than 65% of the 195 US metros we price for HVAC work.
Most Madison AC replacements land between $3,550 and $7,950, with $5,450 the typical price for a 3-ton system on existing ducts. Doing the furnace at the same time brings it to $5,950–$14,650, and a heat pump instead of an AC is $5,050–$11,450.
Madison has real winters, so many homes pair a gas furnace with central AC and often replace the two together. A new split AC here must be at least 13.4 SEER2 under the federal North standard.
Every figure below includes equipment and installation. The usual extras are the permit at $90–$220, a new refrigerant line set at $180–$580, and any ductwork or electrical fixes the contractor finds.
Comparing cities, or after the US-wide picture? See the national guide: HVAC cost in the USA.
$3,550–$7,950 to replace a 3-ton central AC on existing ducts in Madison, installed — $5,450 typical. A heat pump runs $5,050–$11,450, a gas furnace $2,550–$7,300, and AC + furnace together $5,950–$14,650. Verified November 2026. Get free Madison quotes →
- 3-ton central AC on existing ducts: $3,550–$7,950 ($5,450 typical)
- Heat pump, 3-ton: $5,050–$11,450; gas furnace: $2,550–$7,300
- AC + furnace together: $5,950–$14,650
- Mini-split: $2,300–$5,150 for one 12,000 BTU zone, $7,300–$16,500 for four
- Downtown, State Street & the Isthmus runs 5–10% above the city average; UW campus & the Near West: standard to 5% below
Prices verified November 2026 · Cross-referenced against 45+ American pricing sources · See methodology
Installed prices for the Madison metro, re-verified November 2026. Equipment-heavy jobs move less with local labor costs than service calls do.
| Service | Low | Typical | High |
|---|---|---|---|
| Central AC replacement, 3-ton (existing ducts)installed | $3,550installed | $5,450 | $7,950 |
| Central AC + gas furnace, replaced togetherinstalled | $5,950installed | $8,950 | $14,650 |
| Heat pump replacement, 3-ton (existing ducts)installed | $5,050installed | $7,300 | $11,450 |
| Central heat pump, high-efficiency with zoning (3-ton)installed | $9,150installed | $13,250 | $19,200 |
| Gas furnace replacement (80–96% AFUE)installed | $2,550installed | $4,200 | $7,300 |
| Ductless mini-split, 1 zone, 9,000 BTUinstalled | $2,000installed | $3,000 | $4,400 |
| Ductless mini-split, 1 zone, 12,000 BTUinstalled | $2,300installed | $3,550 | $5,150 |
| Ductless mini-split, 1 zone, 18,000 BTUinstalled | $2,950installed | $4,600 | $6,600 |
| Ductless mini-split, 1 zone, 24,000 BTUinstalled | $3,500installed | $5,700 | $8,050 |
| Ductless mini-split, 1 zone, 30,000–36,000 BTUinstalled | $4,400installed | $7,150 | $10,550 |
| Multi-zone mini-split, 2 zonesinstalled | $4,100installed | $5,950 | $9,150 |
| Multi-zone mini-split, 4 zonesinstalled | $7,300installed | $11,000 | $16,500 |
| Like-for-like AC swap: same-size mini-split, existing line setinstalled | $2,100installed | $3,200 | $4,750 |
| Install only: homeowner-supplied mini-split, 1 zonelabor only | $440labor only | $970 | $1,750 |
| Evaporative (swamp) cooler, roof-mountedinstalled | $1,200installed | $2,100 | $3,300 |
| Ductwork replacement, whole houseinstalled | $2,250installed | $4,950 | $8,600 |
| AC compressor replacement (out of warranty)per repair | $1,200per repair | $1,900 | $2,750 |
| AC repair, major: refrigerant leak fix + rechargeper repair | $540per repair | $1,150 | $2,250 |
| AC repair, minor: capacitor, contactor or drain lineper repair | $130per repair | $270 | $530 |
| AC tune-upper visit | $65per visit | $95 | $180 |
| Whole-system HVAC tune-up (AC + furnace)per year | $130per year | $200 | $400 |
| Duct cleaning, whole houseper home | $260per home | $400 | $620 |
| Smart thermostat, installedinstalled | $190installed | $280 | $420 |
| Old AC or furnace removal and disposalper unit | $90per unit | $220 | $450 |
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Prices verified November 2026 · Cross-referenced against 45+ American pricing sources · See methodology
Prices cover the Madison metro: the city and its close suburbs. Outlying towns can run a little lower; Downtown, State Street & the Isthmus runs a little higher.
HVAC prices across Madison
Same city, four kinds of job. Older buildings in Downtown, State Street & the Isthmus take longer, bigger homes in Sun Prairie, Middleton & the suburbs need bigger systems, and UW campus & the Near West usually comes in at or under the city typical.
Downtown, State Street & the Isthmus
- Installed
- $3,750–$8,750 installed
- Typical job
- $5,150–$6,900 / 3-ton AC swap
Condos, row houses and older buildings. Condensers often sit on roofs or in tight side yards, and paid parking, freight elevators and building rules all add labor.
South Madison & Park Street
- Installed
- $3,600–$8,350 installed
- Typical job
- $5,000–$6,600 / 3-ton AC swap
Renovated older homes. Contractors here often find leaky ducts or a tired air handler or furnace, which is where a simple AC quote grows.
UW campus & the Near West
- Installed
- $3,400–$7,800 installed
- Typical job
- $4,700–$6,150 / 3-ton AC swap
Rentals and older houses near campus. Landlord jobs tend to be quick like-for-like swaps of smaller systems, which keeps prices a little under the city average.
Sun Prairie, Middleton & the suburbs
- Installed
- $3,550–$8,450 installed
- Typical job
- $4,900–$6,650 / 3-ton AC swap
Bigger homes with garages and attics. Many need 4 to 5 tons or two systems, and attic air handlers take longer to swap than ones in a garage or closet.
Real-world HVAC costs in Madison
Here's what common HVAC jobs cost in Madison in 2026, a 3-ton central AC replacement on existing ducts, installed.
Swap a 3-ton AC on good ducts
Same spot, same size, matched indoor coil, old unit hauled away. Most Madison jobs land near $5,450; a 17+ SEER2 unit adds about $1,850.
Replace the AC and gas furnace together
The usual move when both are 15+ years old. One install, one warranty, a matched system. Typical is $8,950.
Switch from AC + furnace to a heat pump
A 3-ton heat pump on existing ducts, typically $7,300. Keeping the furnace as backup (dual-fuel) runs $6,500–$15,550.
Cool one room with a mini-split
A 12,000 BTU single-zone mini-split for a bedroom, office or addition, typically $3,550. A 9,000 BTU unit for a small room is $2,000–$4,400.
Cool a whole home with no ducts
A 4-zone ductless system, typically $11,000. Adding ducts for central AC instead costs $2,250–$8,600 before the equipment.
How much does HVAC cost in Madison?
Between $3,550 and $7,950 for a 3-ton central AC on existing ducts, and most Madison homeowners pay close to $5,450. Size, efficiency and access set the number: a basic 13.4 SEER2 swap in an easy spot sits at the bottom, and a 20+ SEER2 variable-speed system with an attic air handler sits at the top.
Heating changes the math. A gas furnace alone runs $2,550–$7,300, a 3-ton heat pump $5,050–$11,450, and replacing the AC and furnace together $5,950–$14,650. For Madison's climate, a gas furnace with central AC (or a cold-climate heat pump) is the usual fit.
Central AC, heat pump and furnace prices in Madison (2026)
A 3-ton central AC runs $3,550–$7,950, a 3-ton heat pump $5,050–$11,450, and a gas furnace $2,550–$7,300, all installed.
| Line on the quote | Low | Typical | High |
|---|---|---|---|
| Central AC replacement, 3-ton (existing ducts) | $3,550 | $5,450 | $7,950 |
| Heat pump, 3-ton (existing ducts) | $5,050 | $7,300 | $11,450 |
| Gas furnace (80–96% AFUE) | $2,550 | $4,200 | $7,300 |
| Central AC + gas furnace together | $5,950 | $8,950 | $14,650 |
| Mini-split, 1 zone, 12,000 BTU | $2,300 | $3,550 | $5,150 |
| Mini-split, 2 zones | $4,100 | $5,950 | $9,150 |
| Mini-split, 4 zones | $7,300 | $11,000 | $16,500 |
| Ductwork replacement, whole house | $2,250 | $4,950 | $8,600 |
AC or heat pump in Madison? A heat pump costs about $1,850 more than a 3-ton AC at the typical price, but it also replaces your heating. If your furnace is old, compare a heat pump with the $8,950 AC + furnace swap, not with the AC alone.
What moves an HVAC quote in Madison:
- Size: a 2-ton system runs about $4,550 and a 5-ton about $7,650 at the typical price. Ask for a Manual J load calculation.
- Efficiency: the minimum here is 13.4 SEER2; a 17+ SEER2 two-stage unit adds about $1,850.
- Access: attic air handlers, rooftop condensers and tight closets add labor, most often in Downtown, State Street & the Isthmus.
- Line set and coil: a new line set runs $180–$580, and the indoor coil has to match the new refrigerant.
- Season: spring and fall bring the best prices; a breakdown during a summer heat wave brings the worst.
Ask every Madison contractor for the same things: tonnage, SEER2 rating, model numbers for both the outdoor and indoor units, and whether the permit and line set are included. Compare those, not just the total. Get a quote for your heating and cooling work →
HVAC cost in Madison by home size
About $4,900 for a 2.5-ton AC (1,000–1,600 sq ft), $5,450 for 3 tons (1,600–2,000 sq ft), and $6,700–$7,650 for 4–5 tons in homes over 2,500 sq ft, typical Madison prices on existing ducts.
Worked example: a 2,000 sq ft Madison home with a 16-year-old AC and furnace. Replacing both runs about $8,950; switching to a 3-ton heat pump on the same ducts runs about $7,300; replacing only the AC is $5,450 but leaves an old furnace in place.
Homes over 2,500 sq ft or with two floors often have two systems or zoning. A high-efficiency zoned heat pump runs $9,150–$19,200, and adding zoning to an existing system $1,550–$4,100.
Madison HVAC costs by system type
| System type | Cost | Best for |
|---|---|---|
| Central AC, 3-ton (existing ducts) | $3,550–$7,950 installed | Homes with sound ducts and a furnace or air handler to pair with |
| Ductless mini-split, single zone (9,000–18,000 BTU) | $2,000–$6,600 installed | One room, an addition, or a home with no ducts |
| Multi-zone ductless mini-split (2–4 zones) | $4,100–$16,500 installed | Whole homes with no ducts, room-by-room control |
| Heat pump, 3-ton ducted (heats and cools) | $5,050–$11,450 installed | Mild and hot climates; replacing an AC and electric heat |
| Gas furnace + AC, replaced together | $5,950–$14,650 installed | Cold climates with natural gas and old equipment on both sides |
| Gas furnace only (80–96% AFUE) | $2,550–$7,300 installed | When the AC is newer than the furnace |
| Dual-fuel: heat pump + gas furnace | $6,500–$15,550 installed | Cold climates: electric heat most days, gas on the coldest |
| Cold-climate heat pump, 3-ton ducted | $8,700–$21,950 installed | Northern homes leaving gas, oil or propane |
| Central heat pump, high-efficiency with zoning | $9,150–$19,200 installed | Big or two-story homes with hot and cold rooms |
| Evaporative (swamp) cooler, roof-mounted | $1,200–$3,300 installed | Dry Western climates only |
| Geothermal heat pump (ground loop) | $13,750–$32,050 installed | Large lots and long stays in one home |
| Window or through-the-wall AC | $190–$1,050 installed | Single rooms and renters; cheapest way to cool |
Equipment vs installation: the Madison AC bill
On a typical $5,450 3-ton swap in Madison, the condenser and matched coil are roughly $2,200–$3,250 and the rest is labor, materials, the permit and overhead. Labor usually makes up 40–60% of an AC replacement.
Buying the unit yourself rarely saves much: many contractors won't install customer-supplied equipment, and the ones who do charge $440–$1,750 or more for a mini-split and won't cover the parts. Brand warranties often require a licensed installer.
What's included in a Madison AC replacement (and what costs extra)
A standard replacement quote covers the outdoor unit, a matched indoor coil, refrigerant, connection to your existing ducts and wiring, removal of the old unit, and startup. Common extras:
- Permit and inspection: $90–$220, often built into the quote
- New refrigerant line set: $180–$580 if the old one can't be reused
- New condenser pad: $35–$220
- Electrical panel upgrade: $760–$3,550, mostly when adding a heat pump or more capacity
Ask for the AHRI certificate showing the matched rating of your outdoor and indoor units. It proves the system you paid for is the one that was installed.
Madison's climate
Madison has real winters, so many homes pair a gas furnace with central AC and often replace the two together. A new split AC here must be at least 13.4 SEER2 under the federal North standard.
System size
Each ton adds equipment cost: about $4,550 for 2 tons and $6,700 for 4 tons at the typical Madison price. A Manual J load calculation often shows a smaller system will do.
Efficiency rating
The federal minimum for a new split AC here is 13.4 SEER2. Higher ratings cost more upfront and pay back fastest where AC runs most of the year.
New refrigerants
New systems use A2L refrigerants (R-454B or R-32), so the indoor coil must match the outdoor unit. That's why condenser-only swaps are rare now, and why older R-410A systems cost more to service.
Ducts and access
Leaky or undersized ducts, attic air handlers and rooftop condensers add hours. Whole-house duct replacement runs $2,250–$8,600.
Location: Downtown, State Street & the Isthmus vs UW campus & the Near West
Downtown, State Street & the Isthmus jobs cost more because of access, parking and older buildings. UW campus & the Near West quotes usually sit at or a little under the city typical.
Season and urgency
Replacing on your schedule in spring or fall is cheaper than an emergency swap in a heat wave. After-hours repair labor runs $140–$220 an hour.
- Get three quotes for the same system.Same tonnage, same SEER2 rating, model numbers on every quote. Madison quotes for the same 3-ton swap run anywhere from $3,550 to $7,950.
- Replace before it fails.If your system is 12–15+ years old, replace it in spring or fall. Emergency replacements in peak season leave no room to shop around.
- Right-size the system.Ask for a Manual J load calculation. An oversized AC costs more, cycles on and off, and leaves the house clammy.
- Check your utility for rebates.There is no federal tax credit for systems installed in 2026, but many utilities still pay rebates on efficient heat pumps and AC. Check before you sign; most require pre-approval or a listed contractor.
- Do the AC and furnace together if both are old.One install of both runs $5,950–$14,650, less than two separate jobs.
- Keep up with tune-ups.A yearly tune-up at $65–$180 catches weak capacitors and low refrigerant before they kill a compressor ($1,200–$2,750).
Before you pay a deposit to a Madison HVAC contractor, get these in writing:
- Tonnage and how it was sized (a Manual J load calculation)
- Model numbers for the outdoor unit and the indoor coil or air handler
- The matched SEER2 (and HSPF2 for a heat pump) rating
- Whether the line set is new, flushed or reused
- Permit, inspection and removal of the old unit
- Thermostat, pad, disconnect and any electrical work
- Parts and labor warranty terms, and who registers the equipment
- Total price, deposit, and start and finish dates
How much does it cost to replace a central AC in Madison?
$3,550–$7,950 for a 3-ton system on existing ducts, installed, with $5,450 typical in Madison. Higher-efficiency units, attic or rooftop installs and new line sets push it up.
How much does a heat pump cost in Madison?
$5,050–$11,450 for a 3-ton heat pump on existing ducts, about $7,300 typical. A high-efficiency zoned system runs $9,150–$19,200.
How much is a new furnace in Madison?
$2,550–$7,300 for a gas furnace installed, about $4,200 typical. With a new AC at the same time, $5,950–$14,650.
How much does a mini-split cost in Madison?
$2,300–$5,150 for a 12,000 BTU single zone, $4,100–$9,150 for two zones and $7,300–$16,500 for four.
How much is an AC tune-up in Madison?
$65–$180 per visit. A yearly plan for AC and furnace runs $130–$400.
How much does AC repair cost in Madison?
$130–$530 for common fixes like a capacitor or contactor. A refrigerant leak repair with recharge runs $540–$2,250, and a compressor $1,200–$2,750.
What size AC does a Madison home need?
As a rough guide, 2.5 tons covers about 1,000–1,600 sq ft and 3 tons about 1,600–2,000 sq ft, but insulation, windows and climate change that. Ask for a Manual J load calculation instead of matching the old unit.
Is there a tax credit for a new AC or heat pump in Madison?
No federal one for 2026: the 25C credit covered improvements made through December 31, 2025. Utility and state rebates may still apply, so check before you buy.
Do I need a permit to replace an AC in Madison?
Usually, yes. Most US cities and counties require a mechanical permit for an AC or furnace replacement, typically $90–$220, and a licensed contractor normally pulls it.
How much does it cost to add ducts in Madison?
$2,250–$8,600 for whole-house ductwork, before the AC or heat pump. In many older homes a multi-zone mini-split ($7,300–$16,500 for four zones) costs less.
Prices verified November 2026 · Cross-referenced against 45+ American pricing sources · See methodology
Prices for the Madison metro area, November 2026. Outer suburbs may vary.
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