How Much Does Air Duct Replacement Cost in Baltimore? [2025 Data]

Air duct replacement costs in Baltimore, Maryland, fall around $1,078 on average, but you could see prices ranging from $458 to $1,699 depending on your home’s size, the layout of your air ducts, and the materials you choose. Permit fees can also increase your costs, while labor takes up a bulk of the cost to replace air ducts.

Air Duct Replacement Cost Factors 

The biggest factors that influence air duct replacement costs in Baltimore, MD, include the size of your home, the location of your ducts, and the duct materials. Below is a closer look at how each of these factors affects your final cost.

Size

The size of your home directly affects air duct replacement costs. Larger homes require more duct materials and labor to replace the entire air duct system. On average, the cost ranges from $2,000 to $5,000 for a small- to medium-sized home. However, duct replacement can run as low as $1,400 for smaller homes and as high as $9,000 for larger homes. Here’s how the size of your home affects duct replacement costs:

Inventory data from Realtor.com shows that the median household size across the country is 1,875 square feet. For the Baltimore area, homes are just over 1,850 square feet, putting them slightly smaller on average. Prices for air duct replacements in Baltimore are close to national averages as a result.

Duct Location

If only specific sections of your ductwork need replacement, such as in a renovation project, costs will depend on the location of the damaged or worn ductwork. Baltimore homes can have ducts in many different locations. Replacing ducts in hard-to-reach or concealed areas—like attics, basements, ceilings, walls, or crawl spaces—can increase labor costs. Here’s how the location of the ducts could affect their cost:

Duct Material

The material you choose for your replacement ducts affects both their cost and longevity. The most commonly used duct material in Baltimore, MD, is sheet metal (aluminum or galvanized steel).

Sheet metal ducts are durable but pricey. Flexible ducts, on the other hand, are more affordable but may need to be repaired or replaced sooner. Since Baltimore experiences subtropical temperatures, with high heat and humidity during the summer months, it benefits homeowners to choose a water-resistant material like metal rather than fiberglass, insulated flexible, or fiberboard ducts. With this in mind, here’s a breakdown of air duct replacement costs based on duct material:

HVAC Pro Costs

Hiring an HVAC pro in Baltimore, Maryland, runs between $50 and $110 per hour. Some pros prefer to charge by the project, charging 40% for the materials and 60% for the labor. This means that, for a $1,000 project, you’re paying $400 on materials and another $600 on labor. 

You’ll find that HVAC technicians with more experience have higher costs than less experienced technicians. For complex air duct replacement work in an older home, go with an experienced pro who does ductwork. For smaller projects, you can save costs by working with a newer professional.

Permits

Baltimore technicians can also help you acquire the necessary building permits. According to the Baltimore City Department of Legislative Reference, the cost for a building permit starts at $50 for a one- to two-family dwelling, or $0.30 per square foot of altered space.

Does Air Duct Replacement Increase Home Value?

If your home’s air duct system is very old, it can decrease your home’s value. The opposite is also true—replacing it can help improve your home’s value. However, most homes don’t see a noticeable increase in home value for an average air duct replacement project. If you’re hoping to see a high return on your investment, it’s best to work with a Baltimore property appraiser or energy auditor to determine which parts of your home will give you the biggest payoff. 

For example, upgrading an old HVAC system has an ROI of 5% to 7%, so upgrading it alongside your air ducts can make a bigger difference on the value of your home after all is said and done.

How Angi Gets Its Cost Data

Home is the most important place on earth, which is why Angi has helped more than 150 million homeowners transform their houses into homes they adore. To help homeowners with their next project, Angi provides readers with the most accurate cost data and upholds strict editorial standards. We survey real Angi customers about their project costs to develop the pricing data you see, so you can make the best decisions for you and your home. We pair this data with research from reputable sources, including the U.S. Bureau of Labor Statistics, academic journals, market studies, and interviews with industry experts—all to ensure our prices reflect real-world projects. 

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