According to Homewyse, the average cost of 256 feet of exhausting ductwork is a bit over $500. The cost of materials needed to install this ductwork is about the same, and the installation cost can range from approximately $750 to more than $1,100.
The cost of ductwork installation varies considerably. Since ductwork is typically placed inside walls, labor costs vary depending on how the how the home is built. Existing ductwork may need to be removed as well, which adds to the total price. Homeowners looking to have new ductwork added may want to ensure they have extra money set aside, as the cost of installation can surpass estimates, especially in older homes that require more work.