Missouri pricing
Furnace Replacement Cost Calculator — Missouri
Estimate what a furnace replacement should cost by output, efficiency and venting work. Every figure below is already adjusted for Missouri labor and material pricing.
Model reviewed August 2026
Does furnace replacement cost cost more in Missouri?
-10% versus the national baseline
Installed prices in Missouri run about 10% below the national baseline. Permit fees are about 15% lower than the national average. Homeowner permits widely allowed.
Permitting varies more within Missouri than between many states — St. Louis County municipalities can require full review while nearby unincorporated areas require little.
Compare with the national average furnace replacement cost calculator.
Estimated installed cost
$4,209 – $5,980
- Furnace and labor
- $4,320
- Venting work
- $0
- Removal and permit
- $464
Estimates only. Local pricing, site conditions and code requirements change the real number.
What changes the number in Missouri
| Local cost indexBelow the national baseline | 0.90x national |
|---|---|
| Permit fee index | 0.85x national |
| Code basisAdopted locally | Local adoption of the IRC; no statewide residential code |
| Owner-builder posture | Homeowner permits widely allowed |
| Largest markets | Kansas City, St. Louis, Springfield, Columbia |
The formula
Cost = base unit cost x efficiency multiplier + venting + removal + permit
High-efficiency condensing furnaces (90%+ AFUE) need new PVC venting and a condensate drain, which is why the jump from 80% to 96% AFUE costs more than the equipment difference alone.
Covered markets in Missouri
City-level cost and permit pages with local building department links.
Frequently asked questions
How much is a new furnace installed?
Most homeowners pay $4,000 to $8,500 for a replacement gas furnace in 2026. Electric furnaces are cheaper to install but cost far more to run.
How long does a furnace last?
15 to 20 years for a gas furnace with annual service. Past year 15, repairs over about $1,500 usually favor replacement.
Sources
Sources & verification
- Missouri Division of Fire Safety
- ENERGY STAR sizing and efficiency guidance
- ACCA Manual J / Manual S sizing standards
- AHRI equipment performance directory
- International Code Council (IRC/IBC)
Model vintage August 2026. The links above are the issuing agencies' own pages — we publish them so you can confirm the current rule yourself, not as evidence that each fact on this page was re-checked with them today. Cost figures are modeled estimates based on national baselines adjusted for local labor and material pricing, not quotes. Permit rules change; confirm with the building department before starting work.