Ductwork Replacement Cost
Leaky or undersized ductwork wastes 20-30% of HVAC energy. Replacing deteriorated ducts with properly sealed and insulated metal runs significantly improves comfort and efficiency throughout the home.
Low Estimate
$2,000
Mid-Range
$6,000
High End
$15,000
Avg ROI
42%
Interactive Cost Estimator
Mid-grade materials, good quality fixtures, standard options.
Estimated Total Cost
$5,760
Based on 200 sq ft at mid quality. Actual costs vary by location and contractor.
Ductwork Replacement Quote Sanity Check
Use this range before signing a contractor proposal. A normal written bid for ductwork replacement should explain labor, materials, permits, cleanup, timeline, exclusions, and change-order pricing.
Question a low bid
Below $1,800
Ask what is excluded, whether materials are allowances, and whether permits, disposal, and finish work are included.
Expected planning range
$2,000 - $15,000
The midpoint is $6,000, before optional upgrades and unexpected conditions.
Require line-item detail
Above $16,500
Premium bids can be valid, but they should name brands, quantities, warranty length, project management, and finish level.
Labor budget
$3,900
65% of midpoint
Materials budget
$2,100
35% of midpoint
Contingency
$600 - $1,200
10-20% buffer
Decision rule
3 comparable bids
Same scope, same finish level
Cost Breakdown
Approx. $3,900 at mid-range pricing
Approx. $2,100 at mid-range pricing
Labor-heavy projects (like this one) benefit most from getting multiple contractor bids. You can save on materials-heavy projects by sourcing materials yourself at contractor pricing.
Contractor Quote Worksheet for Ductwork Replacement
Use this checklist when comparing bids. The cheapest quote is not always the lowest final cost; the bid that defines scope, allowances, permits, cleanup, and change-order rules usually gives the cleaner budget.
| Bid line | What to ask | Why it matters |
|---|---|---|
| Scope definition | Confirm what is included in the ductwork replacement base bid and what is priced as an allowance or option. | Vague scope turns into change orders after demolition or material selection. |
| Labor assumptions | Labor is about 65% of the mid-range budget. Ask whether demo, prep, cleanup, disposal, and final punch-list time are included. | A low bid may exclude prep work, disposal, or return trips. |
| Material allowances | Materials are about 35% of the budget. Get brand, grade, finish, and quantity assumptions in writing. | Allowance bids look cheap until fixtures, finishes, or delivery fees are upgraded. |
| Permit and inspection plan | Confirm who pulls permits, who pays fees, and when inspections happen. | Permit gaps can delay final payment, insurance claims, or home resale. |
| Timeline and disruption | The normal timeline is 1-3 days. Ask what happens if materials arrive late or hidden conditions are discovered. | A fast verbal timeline without milestones is hard to enforce. |
Normal range
$2,000 - $15,000
Contingency
$600 - $1,200
Quote target
3 bids minimum
Ductwork Replacement Scope Audit
Ductwork replacement should be judged by airflow, sealing, insulation, and access restoration. A footage-only bid can miss the return-air and balancing work that decides comfort.
Scope checks
- 1Ask whether the design checks supply runs, return air, room pressure, trunk/branch sizing, insulation, and register locations.
- 2Confirm whether boots, plenums, dampers, mastic sealing, duct insulation, access panels, and drywall patching are included.
- 3For attic, crawlspace, garage, or basement ducts, require a plan for sealing, insulating, and protecting the work area.
Quote traps
- Replacing ducts without checking return airflow or balancing.
- Using long unsupported flex duct runs that can sag or kink.
- Excluding access repair, old duct disposal, asbestos screening, or final airflow checks.
Proof to collect
- ✓Itemized linear footage by duct type and insulation level.
- ✓Photos of sealed joints before ducts are hidden.
- ✓Balancing notes, register airflow readings, or startup checklist.
Reference sources
What Affects the Price
- 1Total linear footage
- 2Duct material (sheet metal vs flex)
- 3Insulation of new ducts
- 4Access difficulty
- 5Sealing and balancing
Popular Upgrades
- Insulated rigid metal ducts
- Aeroseal duct sealing
- Zoned dampers
Discuss upgrades with your contractor before finalizing the quote. Some upgrades are cheaper to include during initial construction than to add later.
DIY vs. Hire a Pro
Professional installation strongly recommended.
DIY Advantages
- • Save 65% on labor costs ($3,900 at mid-range)
- • Control over timeline and material selection
- • Satisfaction of completing the project yourself
- • Flexibility to work in phases
Pro Advantages
- • Guaranteed workmanship and professional finish
- • Proper permits and code compliance
- • Access to trade pricing on materials
- • Required for safety and code compliance
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