Furnace Replacement Cost in St. Louis, MO (2026)
Most St. Louis, MO quotes to replace a furnace come in from $3,650 to $11,600, with $5,300 being a fair middle-of-the-road figure. That places local pricing about 4% below the U.S. average for this project.
Why Furnace Replacement costs differ in St. Louis
Freeze-thaw cycles in the Midwest can affect material selection and add seasonal scheduling constraints, but base labor stays moderate. With a local cost index slightly below the national baseline, labor-driven work here tracks accordingly - which is why our estimate for St. Louis differs from a flat national number.
Because labor is the largest movable cost on this job, wage rates in St. Louis put local furnace replacement at about 4% below the U.S. average. Getting two or three written quotes is the reliable way to see where your project lands within the range.
| Estimate | Low | Average | High |
|---|---|---|---|
| St. Louis (localized) | $3,650 | $5,300 | $11,600 |
| U.S. national average | $3,800 | $5,500 | $12,000 |
Labor vs. materials in St. Louis
On a typical furnace replacement in St. Louis, MO, here is roughly how the average of $5,300 divides between labor and parts. Because local wages drive the labor line, this split is a big part of why pricing in St. Louis differs from other metros.
| Component | Estimated cost | Share |
|---|---|---|
| Labor | $1,800 | 34% |
| Parts & materials | $3,500 | 66% |
What affects the price
Furnace replacement pricing depends mostly on fuel type, output (BTU), and efficiency rating (AFUE). High-efficiency and variable-speed models sit at the top of the range.
- Fuel - gas, electric, or oil
- Efficiency (AFUE %) and staging
- Furnace size / BTU output for the home
- Ductwork condition and modifications
- Permit, inspection, and old-unit removal
Tips for St. Louis homeowners
When you request quotes in St. Louis, ask each contractor to itemize labor, materials, permits, and disposal separately. That makes it much easier to compare bids and to spot where a furnace replacement quote is padded.
Furnace Replacement in St. Louis: FAQ
How much does Furnace Replacement cost in St. Louis, MO?
Is Furnace Replacement more expensive in St. Louis, MO than the U.S. average?
How long does a furnace last?
Should I replace the furnace and AC together?
Does a high-efficiency furnace pay off?
Furnace Replacement prices near St. Louis
How Furnace Replacement pricing in St. Louis, MO compares with nearby metros:
| City | Typical average | |
|---|---|---|
| St. Louis, MO (this page) | $5,300 | |
| Kansas City, MO | $5,300 | View |
| Springfield, MO | $5,300 | View |
| Independence, MO | $5,300 | View |