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

If your HVAC system struggles to keep up with Austin’s long, hot summers, your ductwork may be part of the problem. Leaky, undersized, or aging ducts can waste energy and make your home less comfortable. On average, air duct replacement in Austin costs $1,485, with most homeowners spending between $658 and $2,496. Your final price depends on the size of your home, the duct material used, and how accessible the ducts are.

Air Duct Replacement Cost Factors 

Austin, TX’s mix of older homes in neighborhoods such as Travis Heights and new construction in suburbs such as Round Rock means duct replacement costs vary widely. Labor, materials, and duct location all factor into the final bill. Planning for these cost drivers upfront helps avoid surprises.

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 price ranges from $660 to $1,500 for a small- to medium-sized home. However, duct replacement can run as high as $2,500 for larger homes. Here’s how the size of your home affects duct 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. Flexible ducts are widely used in Austin retrofits, but sheet metal is often preferred in new builds because it withstands Texas heat better and offers long-term efficiency.

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 duct material:

HVAC Pro Costs

Duct replacement is not a one-person job—it often takes a crew of two or more technicians and one to three full days of work, depending on your home’s size and layout.

Local conditions can add complexity. Many older homes in Central Austin neighborhoods such as Travis Heights or Hyde Park were built without modern duct systems, which means contractors may need to cut into walls or ceilings to access existing ductwork. In contrast, newer homes in Circle C or Pflugerville often have attic-based ducts, which are easier to reach but more challenging to work in during Austin’s 100-degree summers.

Because labor costs can climb quickly, most Austin HVAC companies schedule an in-person inspection before quoting a project. This allows them to measure duct runs, check attic or crawl space access, and determine whether insulation or sealing upgrades are needed. Getting multiple quotes is the best way to confirm your price is competitive.

Labor Costs

Austin HVAC contractors charge $75 to $125 per hour, with service calls starting around $100. Rates can climb during peak demand—especially in July and August, when crews are busiest handling AC repair calls. Homes with multiple stories or difficult layouts often require more labor hours.

Permits and Regulations

In Austin, a mechanical permit is required for duct replacement or HVAC modifications. The City of Austin’s Development Services Department oversees residential mechanical permits, which cost $105 with a 6% surcharge. Permits ensure ductwork meets local building and energy efficiency codes. Work without a permit can cause issues if you sell your home, since unpermitted systems often fail inspection.

Licensing and Insurance

HVAC contractors in Texas must be licensed by the Texas Department of Licensing and Regulation (TDLR). Licensed professionals meet training requirements and are required to carry liability insurance. Reputable Austin companies also maintain workers’ compensation coverage. Always confirm your contractor’s license and insurance before hiring.

Local Climate Considerations

Austin’s long, hot summers put heavy strain on HVAC systems. Ductwork routed through attics can face temperatures over 140°F, which increases the risk of air leaks and energy loss. Local HVAC pros often recommend sealing ducts with mastic and wrapping them in insulation to prevent cooling loss. In older homes near Downtown, ducts may also need resizing to match today’s larger AC systems.

Additional Pros to Consider Hiring

While your HVAC contractor will handle the core duct replacement, some Austin homes require extra specialists due to their age, layout, or condition. Older properties often hide ductwork behind plaster walls, while newer homes may need insulation or wiring upgrades. Depending on your situation, you may also need:

• General contractors: In older Central Austin homes with plaster walls or finished ceilings, accessing ductwork may require demolition and later drywall or carpentry repairs. A general contractor ensures the work is properly opened and restored.

• Insulation contractors: Many Austin homes have ducts routed through sweltering attics or unconditioned crawl spaces. An insulation pro can wrap new ducts to reduce energy loss, which is especially valuable during long cooling seasons.

• Mold remediation specialists: Although less common than in wetter climates, Austin’s heavy rains can lead to damp and dirty air ducts. If mold is discovered near ducts, it should be remediated before replacement.

• Electricians: In newer builds or smart homes around Lakeway, Leander, or Bee Cave, ducts may intersect with wiring or automated HVAC components. An electrician can safely reroute circuits or integrate smart controls.

• Asbestos abatement teams: Homes built before 1980 in Central Austin neighborhoods may contain asbestos insulation around older ductwork. If suspected, Texas law requires a licensed abatement contractor to remove it before HVAC work begins.

Does Air Duct Replacement Increase Home Value?

Replacing old or leaky ducts can make your property far more appealing in Austin’s competitive housing market. Many homeowners recoup a return on investment (ROI) of 30% to 60% when installing new ductwork in their Austin home. With scorching summers and long cooling seasons, buyers know the value of an efficient HVAC system that can keep energy bills under control. Plus, new ductwork can improve airflow, reduce allergens, and help your HVAC system cool more effectively.

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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