How Much Does It Cost to Replace Ductwork?
Real 2026 pricing for sheet metal, flex, and fiberglass ducts — what drives the cost and how to choose the right material for your HVAC system.
Last updated: July 2026
The Short Answer
Ductwork replacement costs $1,500 to $6,000 on average in 2026 for a typical 2,000 sq ft home, with most homeowners paying around $3,500. Pricing runs $10-$30 per linear foot installed depending on material — sheet metal lasts longest (50+ years) at $15-$30/ft, flex duct is the budget option at $5-$15/ft but only lasts 10-15 years. Sealing existing ducts ($1,000-$3,000) is a viable alternative if your ducts are structurally sound. Regional labor rates can swing your total ±40%.
Cost by Material (2026)
| Duct Material | $/linear ft | 2K sq ft Home | Lifespan |
|---|---|---|---|
| Flex Duct (insulated) | $5-$15 | $1,500-$4,000 | 10-15 years |
| Fiberglass Duct Board | $10-$20 | $2,500-$5,000 | 20-30 years |
| Rigid Aluminum | $12-$25 | $3,000-$6,000 | 40-60 years |
| Galvanized Sheet Metal | $15-$30 | $3,500-$6,000 | 50-70 years |
| Mobile Home Duct (flex) | $5-$12 | $1,500-$4,000 | 10-15 years |
| Duct Sealing (Aeroseal) | $300-$700 | $1,200-$2,800 | 10-20 years |
| + Custom Fittings/Boots | $50-$200 ea | +$500-$2,000 | — |
Source: HomeAdvisor 2026 + Angi 2026 ductwork installation cost data + Homewyse May 2026.
Cost by Home Size
| Home Size | Duct Length | Total Cost (sheet metal) |
|---|---|---|
| 1,000 sq ft (small) | 60-100 ft | $1,500-$3,000 |
| 1,500 sq ft | 90-150 ft | $2,500-$4,500 |
| 2,000 sq ft (typical) | 120-200 ft | $3,500-$6,000 |
| 2,500 sq ft | 150-250 ft | $4,500-$7,500 |
| 3,000+ sq ft | 180-300 ft | $5,500-$9,000 |
Source: HomeAdvisor 2026 + Angi 2026 ductwork sizing guidelines.
Regional Price Differences
| Region | Multiplier | Sheet Metal Example ($3,500 base) |
|---|---|---|
| Southeast | 0.90x | $3,150 |
| Midwest | 1.0x | $3,500 |
| Southwest | 1.10x | $3,850 |
| Northeast | 1.30x | $4,550 |
| West Coast | 1.40x | $4,900 |
What Affects Your Ductwork Cost
Duct material choice
Sheet metal lasts longest (50+ years) but costs $15-$30/ft. Flex duct is cheapest ($5-$15/ft) but only lasts 10-15 years. Fiberglass duct board offers mid-cost acoustic benefits. Mix materials based on access — sheet metal for visible runs, flex for tight spaces.
Home size and zoning
Larger homes need more linear feet of ductwork. Multi-zone systems (separate thermostats) add 20-30% for zone dampers and controls. Two-story homes typically need 30-50% more ductwork than single-story at the same square footage.
Accessibility
Attics and crawlspaces are easiest — fast install, lower labor cost. Finished basements require drywall cuts (adds $500-$1,500 for repairs). Tight trusses, multiple floor levels, or limited access from finished ceilings can add 25-40%.
Existing duct condition and HVAC compatibility
If your existing ducts are undersized for a newer HVAC unit, full replacement is needed. Adding zones, returns, or supply runs typically costs $300-$800 per run. Older homes with asbestos-wrapped ducts need abatement ($1,500-$3,000 extra).
Red Flags in Ductwork Replacement Quotes
- Quote without a Manual D calculation: Real ductwork quotes require sizing calculations (Manual D) matching your HVAC system. Guessing duct sizes by square footage leads to airflow problems.
- Pushing flex duct for the whole home: Flex is fine for short runs but sheet metal lasts longer and resists crushing. Be wary of contractors using all flex for cost-cutting.
- No license or HVAC certification: Ductwork replacement requires a mechanical contractor license in most states. Always verify license, insurance, and EPA Section 608 for refrigerant work.
- Quote doesn't include drywall repair: Finished basement or ceiling cuts need drywall patching ($500-$1,500). Confirm what restoration is included — many low quotes skip this.
- Asking for 50%+ upfront: Standard deposit is 25-33%. Final payment should be after a leakage test confirms airflow targets and balanced room supply.
Are you an HVAC contractor?
Use our free ductwork replacement cost calculator for material takeoffs and per-foot estimates:
Ductwork Replacement Cost Calculator →Price data sources: HomeAdvisor 2026 Ductwork Installation Cost · Angi 2026 Ductwork Replacement · Homewyse May 2026 · BLS 2026 HVAC Contractor Wages
Last verified: July 2026
Frequently Asked Questions
How much does it cost to replace ductwork in a house?
Ductwork replacement costs $1,500 to $6,000 on average in 2026 for a typical 2,000 sq ft home. Most homeowners pay around $3,500. Pricing depends on linear feet of duct ($10-$30/ft installed), number of registers, accessibility (attic vs crawlspace vs finished basement), and whether the existing ducts are sealed or unsealed. Mobile home ductwork runs $1,500-$4,000. Two-story homes cost 30-50% more than single-story due to harder access. Always get 2-3 quotes — pricing varies by 40-60% between contractors.
How much does ductwork cost per linear foot?
Ductwork costs $10 to $30 per linear foot installed in 2026. Sheet metal (galvanized steel) runs $15-$30/ft and lasts 50+ years. Flex duct costs $5-$15/ft installed but only lasts 10-15 years and risks crushing or pest damage. Fiberglass duct board runs $10-$20/ft. Rigid aluminum or insulated flex costs $12-$25/ft. Labor to install is included in the per-foot price. Custom fittings, transitions, and register boots add $50-$200 each. Run lengths over 25 feet may need a booster fan ($200-$400 each).
How do I know if my ductwork needs replacement?
Signs your ductwork needs replacing: rooms that never reach set temperature, uneven heating/cooling, visible rust or holes in the ducts, loud rattling or whistling noises, musty smell from registers (sign of mold), and rising energy bills despite a newer HVAC unit. A duct leakage test by an HVAC pro costs $200-$400 — if leakage exceeds 20% of total airflow, replacement or sealing is warranted. Most sheet metal ducts last 50-70 years, but flex ducts installed in the 1990s-2000s often fail by year 15. If your home has original flex duct over 15 years old, plan for replacement.
Is it better to seal or replace old ductwork?
Sealing ductwork costs $1,000-$3,000 (mastic sealant, foil tape, Aeroseal aerosol process) and resolves 60-90% of leaks. Replacement costs $1,500-$6,000. Sealing makes sense if ducts are structurally sound, the right size for your HVAC system, and accessible. Replace if ducts are undersized (post-1980 homes with units upsized over time), heavily rusted, crushed, contaminated with mold, or improperly sloped. A Manual D calculation by an HVAC pro determines whether your existing ducts can support your system. New sealed sheet metal ducts typically pay back in 5-8 years through energy savings.
Does replacing ductwork increase home value?
Modestly — ductwork is hidden infrastructure, so it adds value indirectly through improved comfort and energy efficiency. New sealed ducts can cut heating/cooling bills 20-30%, which appraisers and buyers see as a feature. The upgrade also qualifies for a $300-$600 federal tax credit (Inflation Reduction Act 25C, through 2032) when paired with a qualifying HVAC system. For resale, documented ductwork replacement is a stronger selling point than advertised alone — combine with HVAC replacement for maximum ROI. Remodeling Magazine 2026 estimates 40-60% of cost recovered at resale, mostly through avoided inspection concessions and faster sale.
How long does ductwork replacement take?
Ductwork replacement takes 1-3 days for a typical 2,000 sq ft home. Attic or crawlspace access is fastest (1-2 days). Finished basements with drywall cuts add 1-2 days plus $500-$1,500 for drywall repair. Two-story homes take 3-5 days. Expect dust, noise, and HVAC downtime — schedule in spring or fall when you can open windows. Permits are usually required ($75-$200) and most contractors include permit pulling in the quote. Have your HVAC inspected after ductwork replacement — improper duct sizing can shorten the life of a new AC or furnace.
Marcus Webb
Lead Reviewer & Construction Tech Analyst
Marcus spent 8 years working with general contractors and trade businesses before focusing on construction technology. He has personally tested 30+ estimating and project management tools with real project data.
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