Ductwork replacement pricing for HVAC contractors in 2026
Ductwork replacement pricing in 2026: per-linear-foot benchmarks by material type, access premiums, and a quote-building framework for HVAC contractors.
Ductwork replacement pricing is harder to anchor than almost any other HVAC job. An AC swap starts with a unit that has a known distributor cost; a furnace swap has the same. Ductwork has none of that — it's priced by the linear foot, every house has a different footage, and the same 200-foot job can run two hours or eight depending on where the duct lives. Quote it from memory and you're gambling on the margin. This post gives you the per-linear-foot benchmarks for each duct type, the access premiums that move the number, and a quote structure that holds up when the customer asks why it costs what it costs.
The three cost components of any ductwork replacement quote
Every ductwork replacement bid has three buckets. Miss any one and the margin disappears before you realize it.
1. Linear footage — the anchor for everything else
This is the number you cannot estimate from memory. A single-story, 1,600-square-foot home with a simple trunk-and-branch layout in an accessible basement might have 160–200 linear feet of supply and return ductwork combined. A two-story home of the same square footage with multiple air handlers and long flex-branch runs can reach 300–400 feet. Measure during the site visit, or get the floor plan if the customer has it. Guessing costs you every time the real footage is higher than the guess — and duct footage is more variable than almost any other input you quote.
2. Labor — your loaded billing rate × your actual hours
Ductwork replacement is labor-intensive in a way that equipment swaps are not. You're not just installing new duct — you're disconnecting, collapsing, and hauling out old duct, often from tight attic or crawlspace conditions, then hanging, sealing, and testing the new runs. According to the U.S. Bureau of Labor Statistics May 2025 Occupational Employment and Wage Statistics, the national median hourly wage for HVAC mechanics and installers is $32.75. Your billable rate — loaded for overhead, insurance, vehicle costs, and target margin — needs to be meaningfully higher than that figure. If you've never calculated your own floor rate, the minimum hourly rate formula builds it from your actual numbers.
3. Materials, marked up
Mark up duct materials the same way you mark up equipment on any HVAC install. If you're not certain how your markup percentage maps to your gross margin, verify it with the markup calculator before you quote. Markup and margin aren't the same number, and the difference matters on a full ductwork replacement where materials are a significant portion of the ticket.
Ductwork replacement pricing: what to charge per linear foot
Homewyse's May 2026 cost estimator puts the national average installed cost for basic ductwork installation at $15.55–$18.63 per linear foot — a baseline reflecting accessible basement runs with flexible duct and mid-market labor. That's the market floor, not a contractor's target. For jobs in attics, crawlspaces, or other restricted conditions, HomeGuide's 2026 ductwork data shows installed costs ranging from $25 to $55 per linear foot.
Once you account for your loaded labor rate, material markup, and overhead contribution, your installed price will sit above the Homewyse baseline on virtually every job. Here are the typical contractor-side ranges by material type, for accessible runs:
| Duct type | Typical installed range per LF | Common applications |
|---|---|---|
| Flexible duct (R-6 or R-8) | $20–$32 | Branch runs, accessible basement and closet installations |
| Fiberglass ductboard | $28–$45 | Short interior runs, plenum boxes in accessible spaces |
| Galvanized sheet metal | $42–$65 | Trunk lines, long horizontal runs, attic main feeds |
These are installed rates — labor plus materials plus overhead — for accessible work. Access premiums are additive on top; they're covered in the next section.
As a rough sanity check on project totals: a full ductwork replacement on a 1,800-square-foot single-story home with roughly 220 linear feet of accessible basement runs typically comes to $4,400–$7,000 for flexible duct or $9,200–$14,300 for galvanized sheet metal. Neither figure includes an access premium.
Flex duct vs. sheet metal: how material choice shifts your price and your risk
Material type is the second-biggest pricing variable after access, and it's one you can often steer during the consultation.
Flexible duct installs faster and costs less at the supply house. Its performance limitation is well-documented: it relies on being installed straight and properly supported. SMACNA's HVAC Duct Construction Standards and ACCA Manual D both define maximum sag distances and minimum bend-radius requirements that are frequently ignored in residential work. A compressed or kinked flex run loses significant airflow before any equipment fault exists — and the homeowner eventually blames the last HVAC contractor who touched the system. Install it to standard or it becomes a callback liability.
Galvanized sheet metal costs more in materials, takes longer to fabricate, and requires more skill to install correctly. It also lasts decades longer, performs better, and doesn't sag. For trunk lines, attic runs where rodents can damage flexible duct, and customers planning a long-term stay in the home, sheet metal is worth presenting as an upgrade. The higher installed rate is easy to justify when you walk the customer through the service-life difference directly.
Fiberglass ductboard sits between the two: rigid, well-insulated, and reasonable to fabricate for plenum boxes and short accessible runs. It doesn't hold up under moisture or physical abuse, so it's the wrong choice for crawlspace or high-humidity environments.
When you offer both options on a quote, give the customer the actual tradeoff: flex duct at a lower price now versus sheet metal at a higher price but a much longer service life. Most customers appreciate knowing both options exist — and some will choose the upgrade without much persuasion.
Access and scope: what drives your price above the baseline
Access is where ductwork jobs diverge fastest from simple linear-foot math.
Attic work is the most common access penalty. Even in temperate climates, attic ductwork means working between joists with limited range of motion, moving old duct out of the same confined space you're working in, and dealing with heat that slows everything down. Expect meaningfully more labor time per linear foot on attic runs than on accessible basement work — the exact premium depends on how tight the space is and how much old duct you're removing, but attic runs routinely take a third or more longer than basement equivalents. Price them separately rather than averaging across the whole job.
Crawlspace work carries a similar labor premium: low clearance, potentially damp conditions, and a physically demanding working position. Old duct in crawlspaces is often moisture-damaged and heavier to remove than dry attic duct. Price these runs at the same elevated rate as attic work.
Demo and removal is the most underestimated line item on ductwork replacement quotes. Disconnecting, collapsing, and hauling old flexible duct out of an attic or crawlspace is real work that takes real time. Don't bury it in your per-LF rate. List it as its own line on the quote — "removal and disposal of existing ductwork" — so the customer sees it as scope, not as overhead you invented at billing time.
Partial replacement — replacing a single damaged run or a bad section rather than the full system — deserves a minimum job charge. The time to access the attic or crawlspace, locate the problem run, and set up for the repair is nearly the same whether you're replacing 25 feet or 200. Set a minimum floor that makes the access time profitable; the same logic as a service call minimum applies directly here.
For jobs where ductwork replacement accompanies full equipment replacement, the pricing mechanics are the same — see furnace replacement pricing and AC replacement pricing for how to line-item labor and materials when equipment and ductwork are being replaced together.
Takeaways
- Ductwork replacement pricing starts with measured linear footage, not a house-size estimate. Two homes with the same square footage can have 160 or 400 feet of duct depending on layout and access.
- Per Homewyse's May 2026 cost data, the national average installed cost starts at $15.55–$18.63/LF for basic accessible flex-duct runs. Contractors running a profitable operation price above that floor once labor, material markup, and overhead are factored in.
- The BLS May 2025 OEWS report puts the national median HVAC tech wage at $32.75/hr. Your billable rate should be materially higher once overhead and margin are loaded in.
- Material type is the second-biggest pricing variable: flexible duct is fastest and cheapest to install; galvanized sheet metal costs more but lasts significantly longer. Present both options on larger jobs — the upgrade sells more than you'd expect.
- Attic and crawlspace access add meaningful labor time compared to accessible basement runs — price per affected run, not as a blanket job adder. Demo and disposal is a separate line item, not an absorbed cost.
Build your ductwork quote before the next contractor does
Ductwork replacement is the HVAC quote homeowners comparison-shop most aggressively — the cost is unfamiliar and the dollar amounts are large, so they call two or three contractors and compare. A contractor who can hand over a clear, line-itemized proposal that breaks out footage, material type, access premium, and demo separately wins more of those comparisons than one who hands over a single unexplained round number.
JobEstimator is built for that workflow. Enter your loaded labor rate, your material markup, and your access premium factors once; every ductwork bid you build after that pulls from those settings automatically. Plans start at $39/mo — less than the margin that walks out the door on a single job you priced from gut feel.
