Ductwork Cost Calculator and Replacement Estimator
Estimate ductwork replacement or installation costs by home size, replacement scope, attic or crawl-space access, duct material, comfort problem, airflow design, air balancing, and hazard or finish repairs before comparing HVAC bids.
At a glance
Per project before contractor-specific scope and site conditions.
These inputs move the estimate before local labor, access, permits, and project conditions.
Ask contractors to separate included work, allowances, exclusions, and change-order rules.
Estimate your project cost
Use this ductwork cost calculator to estimate ductwork replacement pricing by home size, repair-versus-replace scope, new retrofit work, duct location, flexible-versus-metal material, comfort problem, manual J or duct design needs, returns and dampers, air balancing, asbestos or mold concerns, drywall repair, insulation, permits, and local HVAC labor.
- Duct mastic and foil tapes
- Insulated flexible duct and collars
- Registers, grilles, and dampers
- Airflow meters and balancing tools
- Duct takeoffs, collars, and reducers
- Return air grilles and filter boxes
- Duct insulation wraps and supports
- Duct tape and mastic supplies
Project questions this estimate answers
Use these checkpoints to keep the estimate tied to the scope a contractor will actually price.
- Ductwork cost calculator
Clarify whether the project is a branch repair, partial replacement, whole-home replacement, new retrofit, or redesign with zoning and added returns.
- Ductwork replacement cost
Compare duct material, attic or crawl-space access, sealing, insulation, air balancing, mold or asbestos checks, and drywall repair assumptions.
- Air duct replacement cost
Check whether the estimate includes return ducts, dampers, grilles, collars, mastic sealing, insulation, leakage testing, and equipment compatibility.
- Duct installation cost
Separate new retrofit duct installation from like-for-like replacement because finished-wall openings, manual J design, and added returns can change the project.
Project supplies
Price-check related tools, parts, fixtures, filters, safety items, and materials before you buy or review a bid.
View full supply checklistProducts that may support this project
Related supplies
Use these links to check common product categories, then confirm what your contractor includes.
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Cost drivers to review
- Conditioned home area
- Project scope
- Duct location and access
- Duct material
- Design, returns, and balancing
- Comfort or airflow problem
- Hazards and finish repairs
How this estimate should work
- Estimate ductwork replacement scope from conditioned home area, project scope, duct location, duct material, airflow design, comfort problem, air balancing, hazard checks, and finish repairs.
- Flag repair-versus-replace and replacement-versus-new-retrofit decisions so homeowners do not compare a short branch repair against whole-home duct replacement, new duct installation, or a full airflow redesign.
- Separate manual J or duct design, added return ducts, dampers, zoning, grille changes, sealing, insulation, leakage testing, and air balancing from the base installed ductwork price.
- Use hot rooms, weak airflow, dusty returns, leakage, equipment changes, additions, and zoning issues to decide whether the bid should include design work instead of only replacing visible ducts.
- Account for crawl-space or attic access, finished-wall openings, drywall repair, old duct disposal, permits, asbestos or mold evaluation, insulation replacement, and HVAC equipment compatibility before comparing bids.
- Help homeowners compare ductwork bids against central AC replacement, furnace replacement, heat pump replacement, insulation, mold remediation, crawl space encapsulation, and indoor air quality recommendations before signing.
Cost examples
A planning example for smaller or simpler ductwork replacement work with easier access, fewer upgrades, and limited prep.
A planning example around the starter range when conditioned home area, project scope, and duct location and access are near the middle of the project.
A planning example for larger, upgraded, or harder-to-access ductwork replacement work with more site prep or coordination.
Ductwork replacement cost by project scope
| Project scope | Planning range |
|---|---|
| Small branch repair or short run | $500 - $2,250 |
| Partial duct replacement | $950 - $4,500 |
| Whole-home ductwork replacement | $1,400 - $6,600 |
| New duct retrofit in an existing home | $1,950 - $9,100 |
| Major redesign with zoning | $2,400 - $11,400 |
Ductwork replacement cost by duct location and access
| Duct location and access | Planning range |
|---|---|
| Open basement or utility space | $1,200 - $5,700 |
| Attic or unfinished basement | $1,400 - $6,600 |
| Crawl space or tight attic | $1,700 - $8,050 |
| Finished ceilings, walls, or multi-story access | $2,050 - $9,750 |
Ductwork replacement cost by duct material
| Duct material | Planning range |
|---|---|
| Flexible duct for simple runs | $1,250 - $5,800 |
| Flexible and sheet-metal mix | $1,400 - $6,600 |
| Sheet-metal trunk and custom fittings | $1,700 - $8,050 |
| Insulated, sealed, or high-performance ductwork | $1,900 - $9,000 |
Ductwork replacement cost by design, returns, and balancing
| Design, returns, and balancing | Planning range |
|---|---|
| Replace like-for-like with basic sealing | $1,250 - $5,950 |
| Standard air balancing and sealing | $1,400 - $6,600 |
| Manual J or duct design with added returns | $1,700 - $7,900 |
| Zoned system, dampers, or major airflow fixes | $2,000 - $9,350 |
Ductwork replacement cost by conditioned home area
| Conditioned home area | Planning range |
|---|---|
| 1,000 sq ft | $700 - $3,300 |
| 1,500 sq ft | $1,050 - $4,950 |
| 2,000 sq ft | $1,400 - $6,600 |
| 3,000 sq ft | $2,100 - $9,900 |
| 4,000 sq ft | $2,800 - $13,200 |
Common questions
How much does ductwork replacement cost?
A typical ductwork replacement planning range is $1,400 - $6,600 per project. Final pricing depends on conditioned home area, project scope, duct location and access, duct material, local labor rates, access, permits, and project conditions.
What changes a ductwork replacement estimate the most?
The biggest changes usually come from project scope, especially conditioned home area, project scope, duct location and access, duct material. Contractor availability, code requirements, site access, disposal needs, and regional cost pressure can also move the final quote.
How should I compare ductwork replacement bids?
Ask each contractor to price the same scope, materials, timeline, cleanup, warranty, and permit assumptions. Then compare what is included, what is excluded, and how each quote handles surprises.
What should I enter in a ductwork cost calculator?
A useful ductwork cost calculator should account for conditioned home area, branch repair versus partial or whole-home replacement scope, attic or crawl-space access, duct material, air balancing, added returns, comfort problems, mold or asbestos concerns, drywall repairs, permits, and local HVAC labor.
How should I use an air duct replacement cost estimate before hiring?
Use an air duct replacement cost estimate to compare the same conditioned home area, branch or whole-home scope, duct location, flex or metal material, return-air needs, leakage testing, balancing work, insulation, drywall repairs, and hazard checks. Ask each HVAC contractor whether the bid includes duct design, equipment compatibility, permits, cleanup, and warranty terms.
How much does ductwork replacement cost?
A ductwork replacement planning range is usually $1,400 - $6,600 per project on GetCosts.com for the default 2,000-square-foot home before contractor-specific site conditions. Small branch repairs can cost less, while whole-home replacement, new retrofit duct installation, zoning, finished-wall access, added returns, mold or asbestos checks, and drywall repair can move bids higher.
Why do returns, balancing, and drywall repairs change ductwork estimates?
Ductwork bids can change when the system needs larger returns, new grilles, dampers, leakage testing, manual balancing, insulation, or finished-wall access instead of simple exposed branch runs. Drywall repair, mold or asbestos checks, tight attic or crawl-space access, and matching ducts to a new furnace, AC, or heat pump can make two estimates hard to compare.
What should a ductwork replacement cost estimate include?
A ductwork replacement cost estimate should separate supply ducts, return ducts, trunks, branches, collars, takeoffs, dampers, registers, grilles, mastic sealing, insulation, air balancing, leakage testing, equipment compatibility, demolition, disposal, permits, drywall repair, cleanup, and warranty assumptions.
Should I repair or replace my ductwork?
Duct repair can make sense for a short damaged run, loose connection, or isolated leakage. Replacement is more likely when ducts are undersized, crushed, poorly routed, contaminated, uninsulated, inaccessible for sealing, missing returns, causing weak airflow, or when a new HVAC system or addition needs redesigned ducts.
More project types
Browse related cost guides when this project overlaps with another trade or quote.
Compare contractor bids
Often included
- Labor and standard materials for ductwork replacement.
- Basic site preparation, cleanup, and disposal assumptions.
- Standard contractor scheduling and project coordination.
May cost extra
- Changes related to conditioned home area, project scope, duct location and access, or duct material.
- Permits, code upgrades, access issues, repairs, haul-off, or special-order materials.
- Scope changes discovered after the contractor inspects the site.
Confirm before hiring
- Whether the bid is fixed-price, allowance-based, or subject to site conditions.
- What is excluded, what could trigger a change order, and how surprises are priced.
- Warranty terms, payment schedule, start date, and cleanup responsibilities.
When to request quotes
Use the estimate after you know conditioned home area, project scope, duct location and access, and duct material well enough to compare the same scope across contractors.
Good time to ask
- You can describe conditioned home area, project scope, duct location and access, and duct material without guessing.
- You have photos, measurements, or notes that show the current ductwork replacement scope.
- You are ready to ask at least two contractors for the same included work, exclusions, warranty, and change-order rules.
Wait until you know more
- The project scope may change after an inspection, repair decision, insurance review, or permit requirement.
- You are still deciding between ductwork replacement options that would create different material, labor, or access needs.
Before you request quotes
Use these questions to describe your project clearly and compare contractor bids against the same assumptions.
Quote comparison worksheet- What is included in a ductwork replacement quote, and what would be billed separately?
- How does conditioned home area change labor, materials, disposal, or timeline?
- How does project scope change labor, materials, disposal, or timeline?
- How does duct location and access change labor, materials, disposal, or timeline?
- How does duct material change labor, materials, disposal, or timeline?
- Which assumptions should stay the same when comparing ductwork replacement bids?