Furnace Replacement Cost in St. Louis (2026): Average Price & Estimate

Furnace Replacement Cost in St. Louis

Estimated furnace replacement cost in St. Louis

$2,900–$7,700

Roughly about 4% below the national average.

An affordable labor market keeps prices near or below average.

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Based on St. Louis, MO pricing.

Estimated cost range

$2,900–$7,700

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Estimate, not a quote. Local prices vary by contractor and project. These are 2026 estimates for St. Louis, MO. Get written quotes from licensed St. Louis contractors before you budget.

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What to know about furnace replacement in St. Louis

Cold winters in St. Louis put the focus on heating, so a high-efficiency furnace or a cold-climate heat pump is usually worth it.

What affects furnace replacement cost in St. Louis

Beyond the local market, the same factors that drive furnace replacement cost everywhere apply in St. Louis:

Furnace type: electric, gas, or oil.
Efficiency rating (AFUE).
Furnace size for the home.
Like-for-like versus new ducts or fuel conversion.

Furnace Replacement cost by furnace type in St. Louis

These figures are adjusted for St. Louis pricing (about 0.96x the national average), so they reflect what local homeowners actually pay.

Estimated furnace replacement cost by furnace type in St. Louis (2026)

Furnace type	Typical cost in St. Louis	Notes
Electric	$2,000 to $5,400	installed
Gas (mid-efficiency)	$2,900 to $7,700	The baseline.
Gas (high-efficiency)	$3,750 to $10,000	installed
Oil	$3,450 to $9,200	installed

Frequently asked questions

How much does furnace replacement cost in St. Louis?

In St. Louis, MO, furnace replacement typically costs $2,900 to $7,700 in 2026 for a standard project, about 4% below the national average. Your exact price depends on size, materials, and scope.

Why does furnace replacement cost more or less in St. Louis?

An affordable labor market keeps prices near or below average. Labor rates, permit costs, and local demand are the main reasons St. Louis prices differ from the national average.

Do I need a permit for furnace replacement in St. Louis?

Most furnace replacement projects require a permit. Requirements vary by city and Missouri jurisdiction, so confirm with your local building department. A licensed contractor usually pulls the permit for you.

When is the best time of year for furnace replacement in St. Louis?

In St. Louis, exterior work is easiest from late spring through early fall. Winter weather can delay roofing, siding, concrete, and foundation jobs, and some crews book up fast once the weather breaks.

Is furnace replacement cheaper outside St. Louis?

Sometimes. St. Louis runs about 4% below the national average. Nearby smaller towns with lower labor costs can come in cheaper, while denser urban areas often cost more. Always compare quotes from contractors who serve your specific area.