2026 cost guide · Waukesha County
How Much Does Furnace Replacement Cost in Waukesha County?
Furnace replacement in Waukesha County typically runs $3,000–$9,500+ in 2026 — new gas furnace installed with permit — 80% AFUE low end, 96%+ modulating high end. The honest answer is a range, not a number: anyone quoting a price without seeing the home is guessing. Get every quote itemized in writing — and a free second opinion before signing anything large.
What are the furnace replacement pricing tiers?
Most projects land in one of three honest tiers. The right one depends on how long you'll own the home, how hard the system works, and how the upfront-versus-monthly tradeoff sits with you:
| Tier | Typical range | What's included |
|---|---|---|
| Good — 80% AFUE single-stage | $3,000–$5,500 | Standard-efficiency gas furnace, installed with permit and haul-away. Uses the existing metal flue. |
| Better — 96% AFUE two-stage | $4,500–$7,500 | High-efficiency condensing furnace with PVC sidewall venting — the right efficiency floor for a Wisconsin heating season, and rebate-eligible. |
| Best — 97%+ modulating variable-speed | $6,000–$9,500+ | Modulating gas valve and variable-speed blower for the most even heat and quietest operation. |
What moves a furnace replacement quote?
| Factor | Why it moves the price |
|---|---|
| AFUE tier & staging | 80% versus 96%+ AFUE is the big fork. With a heating season that runs six-plus months in southeastern Wisconsin, the high-efficiency tier pays its premium back through the gas bill. |
| Venting path | A 96%+ condensing furnace vents in PVC through a sidewall, freeing the old chimney — often the right move in older homes, but the venting change is real scope a quote has to include. |
| Ductwork & returns | Undersized returns and leaky trunk joints choke a new furnace. Sealing and rebalancing at changeout is cheap compared to oversizing new equipment to fight the ducts. |
| Permit & inspection | Waukesha County municipalities permit and inspect heating replacements locally — the City of Waukesha additionally requires the work be done by a registered HVAC contractor. It's part of an honest installed price. |
Furnace Replacement costs, city by city
One county-wide price book — but each city's housing stock pulls jobs toward a different end of the range. The city guides explain the local factors honestly:
Furnace Replacement cost in Waukesha, WI
Read the Waukesha guideFurnace Replacement cost in Pewaukee, WI
Read the Pewaukee guideFurnace Replacement cost in Brookfield, WI
Read the Brookfield guideFurnace Replacement cost in New Berlin, WI
Read the New Berlin guideFurnace Replacement cost in Oconomowoc, WI
Read the Oconomowoc guideFurnace Replacement cost in Muskego, WI
Read the Muskego guideFurnace Replacement cost questions, answered straight
Is a 96% AFUE furnace worth it over an 80% unit in Wisconsin?
For most homes, yes. The efficiency gap compounds over a six-month heating season, Focus on Energy instant discounts (verified July 2026: $100 standard, up to $400 income-qualified on 95%+ AFUE units for We Energies customers) narrow the upfront gap, and sidewall venting frees the chimney. The 80% tier still makes sense for tight budgets or homes heading for a remodel.
How long does a furnace replacement take?
Most straightforward basement changeouts in this area are one day - in by morning, heating that night. Venting conversions, duct corrections, or combo furnace-plus-AC installs can add a second day. The quote states the timeline before work starts.
What happens to the federal tax credit everyone mentions?
It ended: the federal 25C Energy Efficient Home Improvement Credit is not allowed for equipment placed in service after December 31, 2025, per the IRS. Utility-side instant discounts through Focus on Energy are the live money in Wisconsin - we apply qualifying discounts on the invoice.
Where to go next
- Explore heating and furnace services — scope, process, and what's included.
- See every range on one page in the Instant Pricing tool.
- Spread the cost with 0% financing through Wisetack.
- Related: the HVAC sizing estimator (sanity-check any quote's BTUs) .
- Holding a quote already? Get a free second opinion — line by line, no obligation.
Other cost guides
Installed price ranges for planning only — not a quote. System size, efficiency, ductwork, electrical or gas modifications, permits, installation conditions, and available rebates can change the final written price. Figures are 2026 planning ranges compiled from southeastern Wisconsin market data and On Time Heating & Cooling's local experience; a written, itemized estimate after a site visit is the only real number. WI License #1482483 — On Time Heating & Cooling, LLC.