How much does a ductwork replacement cost in St. Louis, MO?

The average ductwork replacement in St. Louis, MO costs $6,127 in 2026. Costs range from $2,042 for a basic project to $15,317 for a high-end renovation. St. Louis is 2% more expensive than the national average of $6,000.

What is the labor rate for contractors in St. Louis?

The average contractor labor rate in St. Louis, MO is $31.46/hour, compared to the national average of $30/hour. For a ductwork replacement, labor typically accounts for 65% of the total cost, which is approximately $3,983 in St. Louis.

Are materials more expensive in St. Louis?

St. Louis has a material cost index of 97 (national average = 100). Materials cost about 3% less than the national average. For a ductwork replacement, materials account for 35% of the cost, approximately $2,144.

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

Yes, a ductwork replacement typically requires building permits in St. Louis, MO. The average permit cost in St. Louis is $1,491. Always confirm requirements with the St. Louis building department before starting work.

Is a ductwork replacement a good investment in St. Louis?

A ductwork replacement provides an estimated 42% ROI nationally. In St. Louis, where the median home price is $238,249, this project costs about 2.6% of your home value. This is a small percentage of home value, making it a relatively low-risk improvement.

Ductwork Replacement in St. Louis, MO — Costs $2,042 to $15,317

What does ductwork replacement cost in St. Louis? Average $6,127, ranging $2,042–$15,317. Labor runs $31.46/hr locally — 2% above the national average. Free breakdown with material + labor split.

St. Louis, MO Market

+2% vs national

Labor Rate

$31.46/hr

Material Index

Avg Permit Cost

$1,491

Median Home Price

$238,249

St. Louis is a mid-sized city in Missouri with a healthy pool of local contractors. Homeowners generally have several options to compare for a ductwork replacement, which helps keep pricing competitive. Costs in St. Louis run slightly above the national average, though the gap is modest enough that smart material choices and timing can close it. At a median home price of $238,249, homeowners in St. Louis should weigh the project cost (2.6% of home value) carefully against expected returns to avoid over-improving for the local market.

Low Estimate

$2,042

National: $2,000

Mid-Range

$6,127

National: $6,000

High End

$15,317

National: $15,000

Per Sq Ft

National: $0

Duration: 1-3 days

DIY: Hard

Permits: Required

ROI: 42%

Ductwork Replacement Cost Calculator for St. Louis

Adjusted for St. Louis's labor rate ($31.46/hr) and material costs (index 97).

Project Size: 200 sq ft

50 sq ft1,000 sq ft

Quality Level

Mid-grade materials, good quality fixtures, standard options.

Estimated Total in St. Louis

$5,882

Based on 200 sq ft at mid quality, adjusted for St. Louis market rates.

Local Cost Breakdown

Labor (65%)$3,983

At St. Louis's average rate of $31.46/hr (5% above national avg)

Materials (35%)$2,144

Material cost index 97 (3% below national baseline of 100)

Ductwork Replacement vs. Home Value in St. Louis

Metric	St. Louis	National Avg
Ductwork Replacement (Mid-Range)	$6,127	$6,000
Median Home Price	$238,249	$350,000
Project as % of Home Value	2.6%	1.7%
Estimated ROI	42%	42%
Median Household Income	$50,044	$75,000

What Affects the Price in St. Louis

1Local labor rates ($31.46/hr in St. Louis)
2Material cost index (97 vs national 100)
3Total linear footage
4Duct material (sheet metal vs flex)
5Insulation of new ducts
6Access difficulty

Popular Upgrades

Insulated rigid metal ducts
Aeroseal duct sealing
Zoned dampers

Other Projects in St. Louis, MO

Whole House Generator Installation

$15,081

HardROI 55%

HVAC System Replacement

$12,018

HardROI 50%

Whole House Plumbing Repiping

$10,211

HardROI 45%

Spray Foam Insulation

$8,106

HardROI 60%

Second Story Addition

$201,867

HardROI 60%

Accessory Dwelling Unit (ADU) Construction

$151,400

HardROI 80%

Room Addition

$90,840

HardROI 55%

Home Addition

$80,432

MediumROI 60%

Ductwork Replacement in Other Missouri Cities

Kansas City, MO

$6,325

+3%Pop. 508,090

Springfield, MO

$5,461

-11%Pop. 169,176

Columbia, MO

$5,505

-10%Pop. 126,254

Independence, MO

$6,970

+14%Pop. 123,011

Lee's Summit, MO

$7,325

+20%Pop. 101,108

OFallon, MO

$6,957

+14%Pop. 91,316

St. Joseph, MO

$7,045

+15%Pop. 72,473

St. Charles, MO

$6,757

+10%Pop. 70,719

Planning a Ductwork Replacement in St. Louis

Building permits are typically required for a ductwork replacement in St. Louis. The average permit fee in this area is $1,491, though costs vary based on project scope. Permit fees in this market are above average — factor them into your total budget. Plan for 1-3 days from start to finish.

A ductwork replacement is a complex project best left to licensed professionals. In St. Louis, skilled contractors charge an average of $31.46/hr, and the specialized nature of this work means cutting corners on labor can lead to costly rework.

For the median St. Louis household earning $50,044/year, this project at $6,127 represents a significant investment. Consider financing options or phasing the work to spread costs over time.

Ductwork Replacement — National Guide

See the full national cost guide with DIY tips, cost factors, and ROI analysis.

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