What is the cost per square foot for ductwork?

Roughly $2–$5+ per square foot of home for replacement or modification; $3–$6+ for new ductwork. Cost depends on duct type (metal vs flex), accessibility, and labor rates.

Should I replace old ductwork when replacing HVAC?

If ducts are leaky, poorly sized, or damaged, replacing or sealing them improves efficiency and comfort. If ducts are in good shape, you may only need modifications. A contractor can assess.

How long does ductwork installation take?

Replacement: 2–5 days for a typical home. New ductwork: 3–7 days. Add/modify runs: 1–3 days. Timeline depends on accessibility (attic, crawl, basement) and complexity.

What is the best type of ductwork?

Metal (galvanized) is durable and often used for main trunks. Flex duct is common for branches; it’s easier to install but can be less efficient if poorly installed. Sealed metal or properly installed flex both work well.

Does ductwork need to be insulated?

Ducts in unconditioned spaces (attic, crawl) should be insulated to reduce heat loss/gain. Code often requires it. Insulation adds to material and labor cost.

Can I add ductwork to one room?

Yes. Adding a run or extending to one room is possible if the existing system has capacity. Cost depends on run length, access, and whether the HVAC unit can handle the added load.

What is duct sealing and how much does it cost?

Duct sealing closes leaks at joints and connections. Cost is often $500–$2,000+ depending on system size and accessibility. Sealing can improve efficiency 10–30% in leaky systems.

What affects ductwork installation cost the most?

Scope (new vs replace vs modify), home size, duct type, accessibility (attic vs crawl vs basement), number of zones, and labor rates.

Is it worth replacing ductwork?

Yes, if ducts are leaky, undersized, or damaged. New or well-sealed ductwork improves comfort and efficiency. If the system is old and you’re replacing the HVAC, consider evaluating ducts at the same time.

How much does new ductwork cost for a 2,000 sq ft house?

New ductwork for 2,000 sq ft often runs $6,000–$12,000 including design, materials, and installation. Replacement of existing ducts might be $4,000–$8,000.

Does ductwork installation require permits?

In many areas, yes. Mechanical or HVAC permits may be required. Your contractor typically pulls permits. Cost is often $100–$400.

What is included in a ductwork quote?

Typically: removal of old ducts (if replacement), new duct runs, fittings, insulation where required, sealing, and connections to equipment. Design or load calculation may be extra.

Can ductwork be installed in a house with no ducts?

Yes. New ductwork can be installed for central HVAC. Cost is higher than replacement. Alternatives include ductless mini splits, which don’t require ducts.

How long does ductwork last?

Well-installed metal ductwork can last 25+ years. Flex duct may need attention sooner if exposed to damage. Sealing and insulation help longevity.

Should I get multiple ductwork quotes?

Yes. Get 2–3 written quotes. Compare scope (what’s included), duct type, sealing, and design. Ensure sizing is appropriate for your HVAC.

Ductwork Installation Cost Calculator

Q: How much does ductwork installation cost?

Ductwork installation typically costs $2,000–$8,000+ for an average home depending on scope (new, replace, or modify), home size, and duct type. New ductwork for a 2,000 sq ft home often runs $5,000–$10,000; replacement $4,000–$7,000.

Estimate ductwork installation cost by home size, scope (new, replace, add/modify), duct type, and location. Get low, average, and high estimates below.

How much does ductwork installation cost?

Ductwork installation typically costs $2,000–$8,000+ for replacement or modification; new ductwork for a 2,000 sq ft home often runs $5,000–$10,000. Cost depends on scope, duct type, and labor rates.

Get your ductwork installation estimate

Project details

Enter your project specifications to get a cost range.

Home size

sq ft

Scope

Duct type

Location / labor market

Cost estimate

A range based on the details you entered — not a quote.

Fill in the project details to see your cost range.

How to read this estimate

These figures are based on national average material and labor costs adjusted for the options you selected. Actual pricing varies with your local market, site conditions, material availability and contractor workload. Always get two or three written quotes before committing to a project.

Average Ductwork Installation Cost

Cost by scope

2,000 sq ft, metal

Scope	Est. total
New ductwork	$6,000–$12,000
Replace existing	$4,500–$8,000
Add/modify runs	$1,500–$4,000

Cost by home size

Replacement, metal

Home size	Est. total
1,200 sq ft	$3,000–$5,500
2,000 sq ft	$4,500–$8,000
3,000 sq ft	$6,500–$11,000

What Affects Ductwork Cost?

Scope — New costs more than replace; modify is least.
Home size — More square footage means more duct runs.
Duct type — Metal usually costs more than flex or fiberboard.
Accessibility — Attic and crawl space access affect labor.
Location — Labor rates vary by region.

Data from contractor quotes

Updated regularly

No sign-up required

Free estimates

Get 2–3 local quotes

To confirm

Ductwork Installation Cost FAQs

Common questions about ductwork cost, new vs replace, and duct types.

Get a ductwork quote

Compare quotes from licensed HVAC contractors.

Explore all calculators Contact us

Related Cost Calculators

Disclaimer: Estimates are for planning only. Actual costs depend on scope, access, and location. Get 2–3 written quotes.