How Much Does Air Duct Replacement Cost in Washington, D.C.? [2025 Data]

Air duct replacement is a major home improvement project that directly impacts comfort and energy efficiency, especially in Washington, D.C., where historic builds and aging infrastructure often create complex ductwork challenges. Expect to spend anywhere from $419 to $1,278 on a replacement, or $793 on average, depending on factors like home size, duct location, and the materials used. Labor rates in D.C. also run higher than the national average, reflecting both the specialized skills required and the unique architectural hurdles found in older properties. 

Air Duct Replacement Cost Factors 

Air duct replacement in Washington, D.C., is influenced by several unique local factors. Residential architecture in D.C. commonly features rowhouses, historic properties, and multifamily buildings with unpredictable duct layouts and limited access, often requiring creative solutions from HVAC professionals. Here are the major cost factors to consider.

Size

The size of your home directly affects air duct replacement costs. Larger homes require more materials and labor to replace the entire 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 duct system affects replacement costs:

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. 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 Washington, D.C., is metal sheet.

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. Here’s a breakdown of air duct replacement costs based on the type of duct material: 

HVAC Pro Costs

Homeowners pay $85 to $150 per hour for HVAC technicians in Washington, D.C. Most duct replacement jobs take 20 to 40 hours, with total labor charges ranging from $1,500 to $5,000, especially in older or complex homes needing custom ductwork. 

Additional fees include service calls ($49 to $200), inspections ($40 to $100), and premiums for urgent or off-hours work. Custom sheet metal fabrication also adds cost due to specialized skills.

Additional Pros to Consider Hiring

When embarking on a duct replacement project in Washington, D.C., homeowners can benefit from hiring other specialized professionals alongside their HVAC team:

• General contractor or carpenter: For projects involving significant wall or ceiling cutting, which is common in older D.C. homes, a general contractor can restore drywall, plaster, or decorative finishes after duct installation.

• Electrician: When new HVAC zones, smart dampers, or digital controls are part of the upgrade, licensed electricians provide safe, compliant wiring for your project.

• Insulation specialist: Particularly for attic and crawl space duct runs, professional insulation maximizes system efficiency and reduces the chances of moisture and temperature-related problems.

• Mold remediation specialist: In older or water-damaged ducts, professional mold abatement is often required before new ductwork can be safely installed.

• Energy auditor: A certified energy auditor can verify that your new ductwork is achieving intended efficiency gains and could be a prerequisite for rebates or tax credits

Does Air Duct Replacement Increase Home Value?

Replacing air ducts can positively influence home value in Washington, D.C.’s, competitive real estate market. Although the direct return on investment (ROI) for HVAC replacements and ductwork ranges from 35% to 70%, the perceived value is often higher. Homes with updated systems sell faster, attract stronger offers, and face fewer concessions during negotiations.

In D.C., where older housing and humid summers make HVAC performance critical, replacing aging or inefficient ductwork is a strategic move. If your system is more than 15 years old, frequently needs repairs, or uses outdated materials, replacement can prevent inspection red flags and boost buyer confidence. Even if full replacement isn’t feasible, improvements like duct sealing or duct cleaning can still enhance appeal. 

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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