Ductwork Replacement Cost Calculator
This free ductwork replacement cost calculator gives you a planning estimate for tearing out old ducts and installing new ones. Choose a full-home replacement, a partial area or only the main trunk and returns, then set the home size, the old and new duct material and where the ducts run. You will see a cost breakdown with Budget, Standard and Premium project levels in about two minutes.
Ductwork Replacement Calculator
Answer a few quick questions about your ductwork replacement and the calculator estimates your cost in four steps: Location & Project Type, Old & New Ducts, Access & Options and Labor Market & Timing. A ZIP code is required so we can match your request with local licensed professionals. It does not change the price. Only the questions that matter for your project are shown, and every setting has a sensible default, so you can get a first estimate in under a minute and then fine-tune.
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This calculator provides a planning estimate only. It is not a quote, bid or guaranteed price. Actual contractor pricing may vary based on location, site conditions, material choice, labor market and project complexity. Permit amounts and the asbestos test allowance shown are allowances, not municipal fees or lab quotes. Asbestos abatement, HVAC equipment, drywall repair and painting are not included.
Request Quotes From Licensed HVAC Contractors
Use the estimate above as your planning budget, then request quotes from licensed HVAC contractors using the form below the calculator. A floor plan, photos of the attic, basement or crawl space and the model of your equipment help contractors quote more accurately.
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How to Read Your Ductwork Estimate
Your result shows an Estimated Project Budget, which is the Standard estimate, together with a typical range from Budget to Premium. Results update automatically if you change an input after calculating.
Budget
Lower range
Basic duct materials and lean labor.
Standard
Planning number
Quality duct and fittings, careful sealing and a licensed installer at typical rates. This is the best number to plan around.
Premium
Upper range
Higher-grade duct and fittings, thorough sealing and premium service.
What Is Included in Each Cost Category
Materials
New duct, fittings, plenums, registers and grilles, insulation, sealing materials and any options you select.
Labor
Installer time for layout, hanging, connecting, sealing and testing the new ducts.
Removal & Disposal
Removal of the old ducts, plus disposal of the old duct material and debris haul-away.
Equipment & Specialty
An asbestos test allowance, only when you select old ducts that may contain asbestos.
Permit / Inspection
An optional allowance only. Real fees are set by your city or county.
Additional Costs
An urgent or after-hours service premium, when selected.
Asbestos abatement, HVAC equipment, drywall repair and painting are not included. The breakdown only shows categories that apply to your project, so you will not see empty $0 rows.
How Much Does Ductwork Replacement Cost?
Ductwork replacement typically costs about $10,000 at the Standard level for a full replacement in a 2,000 to 2,500 square foot, one-story home, and about $6,200 to $16,300 across the Budget to Premium range. A partial replacement or a trunk-and-returns job costs less.
This calculator uses the following planning figures for old flex ducts that are removed, new mixed flex-and-metal ducts, R-6 insulation, open attic or basement runs, a permit allowance, debris haul-away and an average labor market:
| Project | Budget | Standard | Premium |
|---|---|---|---|
| Full replacement (2,000 to 2,500 sq ft) | $6,245 | $9,955 | $16,275 |
| Partial area (about 900 sq ft) | $3,120 | $5,045 | $8,300 |
| Main trunk and returns (medium) | $1,805 | $2,970 | $4,935 |
Change any input and the numbers update, because the calculator prices new duct materials, removal, disposal, labor and permit separately.
Full Replacement by Home Size — Standard Level
| Home size | Standard |
|---|---|
| Up to 1,000 square feet | about $5,045 |
| 1,000 to 1,500 square feet | about $6,320 |
| 2,000 to 2,500 square feet | about $9,955 |
| 2,000 to 2,500 square feet, two-story | about $10,340 |
| 2,500 to 3,500 square feet | about $12,670 |
| Over 3,500 square feet | about $16,300 |
How This Ductwork Replacement Calculator Works
Choose the project. Pick a full home, a partial area or only the main trunk and returns. Choose the size. For a full replacement, select your home size and number of stories. For a partial area or the trunk, select the size of the job. Choose the old and new materials. Select the type of the old ducts, the new duct material and the insulation level. Describe the access. Tell us where the ducts run and whether to remove the old ones. Set your labor market and timing. Choose the market that matches your area and whether the work is urgent.
The calculator then prices materials and labor at planning rates and shows three project levels. Your ZIP code is used to match your request with local HVAC contractors. It does not change the price.
01 — Project
Full home, partial area, or main trunk and returns.
02 — Size
Home size and stories, or the size of the partial or trunk job.
03 — Materials
Old duct type, new duct material and insulation level.
04 — Access
Where the ducts run and whether the old ducts are removed.
05 — Three Levels
Budget, Standard and Premium, with permit, disposal and urgency where they apply.
What Affects Ductwork Replacement Costs?
Project type
A full replacement removes the old duct system and installs a new one from the equipment to every room. A partial replacement swaps out one area. A trunk-and-returns job replaces the main supply trunk and the return ducts and leaves the branches in place.
Home size and number of stories
At the Standard level, a full replacement costs about $5,045 for a home up to 1,000 square feet, about $6,320 for 1,000 to 1,500 square feet, about $9,955 for 2,000 to 2,500 square feet, about $12,670 for 2,500 to 3,500 square feet and about $16,300 for a home over 3,500 square feet. A two-story home raises the 2,000 to 2,500 square foot estimate to about $10,340.
Old duct type
Flex duct is quick to pull out. Metal duct and duct board take longer, and the old pieces are bulky to haul away. For a full replacement at the Standard level, old metal ducts give about $10,045 and duct board about $10,025. Older ducts and duct wrap can contain asbestos, and the calculator adds an asbestos test and abatement allowance when you select it, which gives about $10,545. Abatement must be done by a licensed contractor.
New duct material
The default is a mixed system, with metal trunks and flexible branches. An all-flex system lowers the Standard full-replacement estimate to about $9,165, and an all-metal system raises it to about $11,990. Flex is quick to install and costs less. Metal has smoother walls, holds up better and is quieter.
Where the ducts run
Open basement runs are the default. An attic raises the Standard full-replacement estimate to about $10,595, because the work is slower in tight, hot spaces. Ducts that must be fished through finished walls and ceilings take the longest and raise it to about $12,515.
Removal and disposal
The old ducts are removed and hauled away by default. Skipping removal lowers the Standard full-replacement estimate to about $9,320. Removal and disposal are priced as their own lines, so you can see what the tear-out adds.
Options
Options include air balancing, extra duct sealing, zoning dampers, a media filter cabinet, a fresh-air intake and sound-reducing duct liner. Air balancing raises the Standard full-replacement estimate to about $10,330. Options appear only when they apply.
Permits
Many cities require a permit and an inspection for a full duct replacement. The calculator includes a permit allowance of about $200 at the Standard level by default. If you remove it, the Standard full-replacement estimate falls to about $9,755. The allowance is a planning placeholder, not the municipal fee.
Urgency
Urgent and after-hours calls carry a premium. The calculator adds 15% to labor for work within about 48 hours and 40% for emergencies. An emergency replacement raises the Standard full-replacement estimate from about $9,955 to about $11,815.
Budget vs Standard vs Premium Ductwork Replacement
The three project levels reflect real differences, not a simple multiplier. Use Standard as your main planning number, and the Budget-to-Premium range to see how much your choices can swing the result.
Budget
Basic duct materials, a leaner labor rate and fewer labor hours.
Standard
Quality duct and fittings, careful sealing and a licensed installer at typical rates.
Premium
Higher-grade duct and fittings, more thorough sealing and testing and premium service rates.
Repair vs Replace
When replacement makes sense
Replacement can make sense when ducts are crushed, wet, moldy, damaged by rodents or badly leaking, and when they are more than about 25 years old.
When repair may be enough
Isolated leaks and loose joints can often be sealed for much less. Ask for a duct leakage test before you decide, and use the duct repair calculator to compare the numbers.
Regional Pricing Differences
HVAC labor rates and permit practices vary across the country. Rather than guess from your ZIP code, the calculator lets you choose a labor market, from lower-cost areas to the highest-cost metro areas, and applies it to labor and removal. A highest-cost market raises the Standard full-replacement estimate from about $9,955 to about $11,995. Materials are not adjusted.
DIY vs Hiring a Licensed HVAC Contractor
Replacing ducts is rarely a DIY project. Duct sizing, sealing and the connection to the equipment all affect comfort and efficiency, and old ducts can hide asbestos or mold. Many areas require a licensed contractor and a permit.
Questions to Ask HVAC Contractors
- Did you test the old ducts for leaks, and do the numbers show replacement is needed?
- Did you size the new ducts with a load calculation and a duct design?
- Which duct material and insulation level are in the quote?
- How will you seal the joints, and will the new system be tested?
- Does the quote include removal, haul-away, registers, returns and the permit?
- Will you test for asbestos if the old ducts are old enough?
How to Avoid Unexpected Ductwork Replacement Costs
- Test before you replace. A leakage test shows whether sealing is enough.
- Ask for a written scope that lists the materials, the sealing method, removal and the permit.
- Check the equipment. New ducts on an undersized system will not fix comfort.
- Ask about drywall repair. Finish work is not part of this estimate.
- Avoid emergency calls when you can plan the work.
Ready for a Real Quote?
Use the estimate above as your planning budget, then request quotes from licensed HVAC contractors using the form below the calculator. A floor plan, photos of the attic, basement or crawl space and the model of your equipment help contractors quote more accurately.
Quick Answers About Ductwork Replacement Costs
How much does ductwork replacement cost?
Ductwork replacement commonly costs about $10,000 at the Standard level for a full replacement in a 2,000 to 2,500 square foot, one-story home, and about $6,200 to $16,300 across the Budget to Premium range.
When should ductwork be replaced?
Ductwork may need replacement when it is crushed, wet, moldy, damaged by rodents, badly leaking or more than about 25 years old. Isolated leaks can often be sealed instead.
Can you replace just part of the ductwork?
Yes. A partial replacement swaps out one area, and a trunk-and-returns job replaces the main supply trunk and return ducts. Both cost less than a full replacement.
Do old ducts contain asbestos?
Some older ducts, duct wrap and sealing tapes contain asbestos. Homes built before about the 1980s are most at risk. A lab test confirms it, and a licensed contractor must handle removal.
What is the biggest cost driver in ductwork replacement?
The size of the area is the biggest driver, followed by duct material, where the ducts run, the type of old ducts and whether the work is a full, partial or trunk-only replacement.
Ductwork Replacement Cost FAQs
How much does ductwork replacement cost?
In this calculator, a Standard estimate for replacing all the ducts in a 2,000 to 2,500 square foot, one-story home is about $9,955, with a Budget to Premium range of roughly $6,245 to $16,275. The estimate includes removal of the old flex ducts, new mixed flex-and-metal ducts, R-6 insulation, sealing and a permit allowance.
How much does it cost to replace only part of the ductwork?
A partial replacement covers one area, such as a bad run in an attic. At the Standard level, a medium area of about 900 square feet costs about $5,045, with a small 400 square foot area about $3,230 and a large 1,500 square foot area about $7,225.
How much does it cost to replace the main trunk and returns?
Replacing only the main trunk line and return ducts costs about $2,970 at the Standard level for a medium job, about $2,275 for a small one and about $3,810 for a large one. This is a good fit when the branch ducts are sound but the trunk is leaking or damaged.
Does the old duct type change the replacement cost?
Yes. Removing old ducts costs more when they are metal or duct board than when they are flex, and the most when they contain asbestos. For a full replacement at the Standard level, old metal ducts give about $10,045, duct board about $10,025 and ducts that need an asbestos test and abatement about $10,545.
Does it cost less if I leave the old ducts in place?
Skipping removal lowers the Standard full-replacement estimate from about $9,955 to about $9,320. Many installers abandon old ducts in place only when they are sealed off and not in the way. Ask your contractor whether that is allowed where you live.
How much more does a larger or multi-story home cost?
At the Standard level, a full replacement runs from about $5,045 for a home up to 1,000 square feet to about $12,670 for 2,500 to 3,500 square feet and about $16,300 for a home over 3,500 square feet. A two-story home with 2,000 to 2,500 square feet is about $10,340.
When should ductwork be replaced instead of repaired?
Replacement can make sense when ducts are crushed, wet, moldy, rodent-damaged, badly leaking or more than about 25 years old. Isolated leaks and loose joints can often be sealed. Ask for a duct leakage test before you decide, and use the duct repair calculator to compare.
Do I need a permit to replace ductwork?
Many cities require a permit and an inspection for a full duct replacement. The calculator includes an allowance of about $200 at the Standard level, and removing it lowers a full-replacement estimate to about $9,755. Real fees are set by your city or county.
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This calculator provides a planning estimate only. It is not a quote, bid or guaranteed price. Actual contractor pricing may vary based on location, site conditions, material choice, labor market and project complexity. Permit amounts and the asbestos test allowance shown are allowances, not municipal fees or lab quotes. Asbestos abatement, HVAC equipment, drywall repair and painting are not included.