How Much Does Ductwork Replacement Cost in 2026?

Replacing ductwork in a typical American home costs between $1,400 and $5,900, with most homeowners paying around $3,200 for a full replacement on a 2,000-square-foot house. If you only need to replace a section or seal leaks, expect to pay $200 to $1,500. These prices include labor, materials, and disposal of old ducts, but NOT a new HVAC unit. Your final cost depends on your home’s size, the type of ductwork material you choose, and how accessible your ducts are.

If your energy bills keep climbing, certain rooms never get comfortable, or your system is more than 15 years old, your ductwork may be the culprit. Leaky or deteriorating ducts can waste 20 to 30 percent of the air your HVAC system produces, according to the U.S. Department of Energy. That waste costs you money every single month.

Quick Cost Overview

Project Type	Average Cost
Seal and insulate existing ducts	$200 to $800
Partial duct replacement (1 to 2 sections)	$300 to $1,500
Single room or zone replacement	$500 to $2,000
Full ductwork replacement (1,500 sq ft home)	$1,400 to $4,200
Full ductwork replacement (2,500 sq ft home)	$2,800 to $7,500
Full ductwork replacement (3,500+ sq ft home)	$5,000 to $12,000+
Per linear foot (materials plus labor)	$25 to $55

What Drives Ductwork Replacement Costs

1. Home Size

This is the biggest factor. Larger homes need more ductwork, more material, and more labor hours. HVAC contractors typically charge by the linear foot, ranging from $25 to $55 per foot depending on material type and your location. A 1,500-square-foot home might have 150 to 200 linear feet of ductwork. A 3,000-square-foot home can have 400 to 600 feet or more.

2. Ductwork Material

The type of duct material makes a significant difference in both cost and longevity:

Material Type	Cost Per Linear Foot	Expected Lifespan	Best For
Flexible duct (fiberglass)	$1 to $2	15 to 25 years	Budget installs, short runs
Insulated flexible duct	$2 to $4	15 to 25 years	Attics, unconditioned spaces
Sheet metal (rigid)	$3 to $6	30 to 50 years	Long runs, commercial-grade durability
Fiberboard duct	$2 to $4	20 to 30 years	Straight runs, moderate budgets

Sheet metal costs more upfront but lasts twice as long as flexible duct. For most homeowners planning to stay in their home, rigid metal is the better long-term investment.

3. Labor and Accessibility

Labor typically runs $50 to $100 per hour, and most full replacements take 8 to 15 hours depending on complexity. Ducts in easy-to-reach crawl spaces or basements cost less to replace than ducts hidden inside walls or above finished ceilings. When contractors have to cut drywall or remove insulation to reach the ducts, expect to pay $500 to $1,500 more for the access work and repairs.

4. Number of Zones and Vents

Every supply register and return air grille adds complexity. A home with 15 supply vents and 6 return vents costs more to retrofit than a simpler layout. Zoned systems, where different areas of your home have separate temperature controls, also add cost because they require additional dampers and controls.

5. Your Region and Local Market

HVAC labor rates vary significantly across the country. Here is a general guide by region:

Region	Typical Full Replacement Cost (2,000 sq ft)
Midwest (Ohio, Indiana, Iowa)	$2,000 to $4,500
South (Texas, Georgia, Florida)	$2,200 to $5,000
Southeast (North Carolina, Tennessee)	$2,000 to $4,800
Northeast (New York, Massachusetts)	$3,500 to $8,000
West Coast (California, Oregon, Washington)	$3,000 to $7,500
Mountain West (Colorado, Arizona)	$2,500 to $5,500

California and New York consistently run 30 to 60 percent above the national average due to higher labor rates, permit requirements, and cost of living.

Signs Your Ductwork Needs Replacing (Not Just Cleaning)

A duct cleaning typically costs $300 to $600 and is the right call for dusty, moderately dirty systems. But cleaning will not fix these problems, all of which point to replacement:

Age over 15 to 20 years. Most flexible ductwork has a design life of 15 to 25 years. As it ages, the interior lining degrades, connections loosen, and insulation deteriorates. If your home was built before 2005 and has never had ductwork replaced, it may be time.

Visible damage. Crushed, kinked, or collapsed flex duct restricts airflow badly. Gaps at joints, disconnected sections, or ducts hanging loose are also serious problems that cleaning will not solve.

Persistent uneven temperatures. If one side of your home is always 5 to 10 degrees warmer or cooler than the other, damaged or improperly sized ducts are often the cause.

Rising energy bills with no other explanation. The EPA’s ENERGY STAR program notes that leaky ducts can force your HVAC system to work 20 to 30 percent harder, adding hundreds of dollars per year to your utility bills.

Musty or moldy smells. If you smell mold when the HVAC kicks on, moisture has gotten into your ductwork, which can mean both a health hazard and structural deterioration. The EPA’s guidance on mold in HVAC systems recommends professional assessment if you suspect mold inside ducts.

Loud rattling or banging. Some noise is normal, but loud rattling often signals loose duct sections or collapsed materials that restrict airflow.

Duct Sealing vs. Full Replacement: How to Decide

Before committing to full replacement, get a duct leakage test. Many HVAC contractors offer this for $150 to $300 using a device called a duct blaster. If your ducts are leaking but otherwise structurally sound, sealing is a far cheaper fix.

Option	Cost	Best When
Mastic sealant (DIY)	$50 to $150	Accessible ducts, minor leaks at joints
Professional duct sealing (aerosol method)	$400 to $1,500	Moderate leaks, ducts in good shape
Partial duct replacement	$300 to $1,500	One damaged section, rest of system is fine
Full duct replacement	$1,400 to $5,900+	System over 20 years, widespread damage, multiple problem areas

The aerosol sealing method, sometimes called Aeroseal, is worth considering if your ducts are mostly intact. A contractor pressurizes your system and injects an aerosol that seals leaks from the inside. It typically reduces duct leakage by 60 to 90 percent without tearing out walls.

Cost by Home Type

Crawl Space Homes

Homes built over a crawl space, common in the Southeast and Midwest, often have ductwork running through this unconditioned area. Crawl space ducts are vulnerable to moisture, pest damage, and temperature extremes. Costs run $1,500 to $5,000 for a full replacement, often including new insulation around the ducts. If your crawl space also needs encapsulation (vapor barrier installation), budget an additional $1,500 to $4,000 on top of ductwork costs.

Slab-Foundation Homes

Homes on a concrete slab sometimes have ducts running under the slab. These are rarely replaced because of the difficulty and cost. Instead, contractors typically install new overhead ductwork through the attic or interior walls, bypassing the old system entirely. This approach costs $4,000 to $12,000 but avoids jackhammering through your foundation.

Two-Story Homes

Multi-story homes need ducts to reach every floor, often routed through interior walls. This adds labor time and may require opening finished walls, which then need repair and repainting. Budget 30 to 50 percent more than a comparable single-story home for a two-story job.

Homes with Attic Ductwork

Attic ducts are common in Southern states. The extreme summer heat in an unconditioned attic, sometimes reaching 140 to 150 degrees Fahrenheit, degrades flex duct much faster than ducts in conditioned spaces. If your attic has original flex duct from 1990 to 2005, it likely needs replacing. Attic replacement costs typically run $2,000 to $6,000 depending on home size.

DIY vs. Hiring a Pro

Task	DIY Feasible?	Notes
Sealing visible joints with mastic	Yes	Buy mastic sealant and foil tape; follow DOE guidelines
Replacing one short flex duct run	Possibly	Requires proper connections and insulation
Installing new supply or return registers	Yes	Usually just screwing in a new grille
Replacing full ductwork system	No	Requires proper sizing calculations and building permits
Rerouting ducts through walls or floors	No	Complex work; improper installs create fire hazards

The Department of Energy’s guidance on duct sealing specifically recommends using foil tape or mastic sealant (NOT cloth duct tape, which fails quickly) for DIY sealing jobs. For anything beyond sealing exposed joint connections, hire a licensed HVAC contractor.

Most states require permits for full ductwork replacement. Working without a permit can create problems when you sell your home or file an insurance claim. Your contractor should handle the permit; be suspicious of anyone who offers to skip it to save money.

How to Save Money on Ductwork Replacement

Get three quotes. HVAC pricing varies widely, and getting multiple bids often reveals a 20 to 40 percent spread. Make sure each contractor quotes the same scope of work so you are comparing apples to apples.

Check for utility rebates. Many utility companies offer rebates of $100 to $500 for upgrading to properly insulated, sealed ductwork. Check your utility provider’s website or ENERGY STAR’s rebate finder before signing any contracts.

Look into federal tax credits. The Inflation Reduction Act expanded energy efficiency tax credits. Under the Energy Efficient Home Improvement Credit (IRS Form 5695), improvements to your HVAC system, including properly insulated ductwork that improves efficiency, may qualify for a credit of up to 30 percent of costs, capped at $1,200 per year. Consult a tax professional and visit IRS.gov Publication 946 for current rules, since credits and caps change.

Schedule in the off-season. Spring and fall are the slowest seasons for HVAC contractors. You may be able to negotiate 10 to 15 percent off the quoted price if you schedule in March, April, October, or November.

Combine with other HVAC work. If you are already replacing your furnace or air conditioner, do the ductwork at the same time. You will save on the mobilization costs contractors charge just to show up, and you may get a bundled discount.

Do not replace what does not need replacing. Get a duct leakage test first. If only one zone of your home has damaged ducts, a partial replacement is far cheaper than a full system overhaul.

Questions to Ask Your HVAC Contractor

Before signing anything, get clear answers to these questions:

Will you pull a permit for this job?
What material are you proposing to use, and why?
Will you perform a duct leakage test before and after to verify the improvement?
Is the quote for materials and labor, or labor only?
Does your quote include cleaning up debris and removing old ductwork?
Are you licensed and insured in this state?

To verify licensing in your state, look up your state’s contractor licensing board. The National Association of Home Builders (NAHB) maintains resources for finding qualified contractors.

Typical Project Timeline

A full ductwork replacement on a 2,000-square-foot home typically takes one to three days. Partial replacements or sealing jobs are often done in a few hours to one day. If the job involves significant drywall work or permitting delays, it can stretch to one to two weeks from the initial assessment to final inspection.