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HVAC

Ductwork Replacement Cost Calculator

Estimate ductwork replacement or installation costs by home size, replacement scope, attic or crawl-space access, duct material, airflow design, air balancing, and hazard or finish repairs before comparing HVAC bids.

Starter planning range $1,400 - $6,600 Per project; final pricing depends on project conditions.

At a glance

Typical planning range $1,400 - $6,600

Per project before contractor-specific scope and site conditions.

Main cost drivers Conditioned home area, project scope, duct location and access, and duct material

These inputs move the estimate before local labor, access, permits, and project conditions.

Best next step Compare bids against the same assumptions

Ask contractors to separate included work, allowances, exclusions, and change-order rules.

Interactive estimate

Estimate your project cost

Ductwork replacement pricing depends on home size, whether the work is repair-versus-replace or a new retrofit, duct location, flexible-versus-metal material, manual J or duct design needs, returns and dampers, air balancing, asbestos or mold concerns, drywall repair, insulation, permits, and local HVAC labor.

Estimated range $1,400 - $6,600 Use this as a planning range, then compare contractor quotes against the same assumptions.
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Project supplies

Compare related tools, parts, fixtures, filters, safety items, and materials before you buy or review a bid.

View full supply checklist

Cost drivers to review

  • Conditioned home area
  • Project scope
  • Duct location and access
  • Duct material
  • Design, returns, and balancing
  • Hazards and finish repairs

How this estimate should work

  1. Estimate ductwork replacement scope from conditioned home area, project scope, duct location, duct material, airflow design, air balancing, hazard checks, and finish repairs.
  2. 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.
  3. 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.
  4. 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.
  5. 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

Lower-scope ductwork replacement $1,050 - $5,600

A planning example for smaller or simpler ductwork replacement work with easier access, fewer upgrades, and limited prep.

Typical ductwork replacement $1,400 - $6,600

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.

Higher-scope ductwork replacement $1,700 - $8,900

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

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.

Browse related cost guides when this project overlaps with another trade or quote.

Compare another planning range before you call contractors.

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?