Cost of Ductwork for Central Air: Typical Prices and What Affects Them 2026

Buyers typically pay between $1,200 and $12,000 for central air ductwork depending on home size, duct type, and access. This article covers the cost of ductwork for central air with realistic low–average–high ranges and the main drivers that change a final quote.

Item	Low	Average	High	Notes
Full new duct system (2,000 sq ft home)	$2,000	$6,000	$12,000	Assumptions: standard single-story, attic or crawl access, mid-grade flex and metal ducts.
Partial repairs or branch replacement	$300	$1,200	$4,500	Assumptions: 2–8 supply runs, existing main trunk usable.
Per sq ft (new install)	$3 per sq ft	$6 per sq ft	$12 per sq ft	Assumptions: includes materials & labor.

Typical Total Price for Ductwork Installation in a 2,000 sq ft Home

Full duct replacement for a typical 2,000 sq ft single-family house generally costs $2,000-$12,000, with an average around $6,000. Most homeowners in the U.S. will see prices cluster near $4,000-$8,000 for a normal attic or crawlspace install.

Assumptions: Midwest labor rates, 1–2 story home, standard returns and 10–15 supply registers, existing HVAC unit retained.

Breakdown of Major Quote Components for Ductwork Pricing

This table shows common line items that appear on quotes and typical ranges for each component. Materials and labor together usually make up 70%–85% of the total price.

Materials	Labor	Equipment	Permits	Delivery/Disposal
$400-$3,500 (flex, metal, boots)	$1,000-$6,000 ($75-$125 per hour)	$50-$600 (lift rental, power tools)	$0-$400 (local)	$50-$600 (debris haul)

Assumptions: includes trunk, branches, registers, insulation, sealing tape/mastic.

How Run Length, Number of Rooms, and Duct Type Change the Price

Run length and number of supply/return runs scale labor and material linearly; each additional supply run typically adds $100-$400 for materials and $150-$500 for labor. Replacing trunks longer than 40 linear feet or adding more than 12 supply runs pushes projects into the high-cost range.

Numeric thresholds: short jobs under 200 linear ft total, medium 200–600 ft, large over 600 ft.

Site Conditions That Drive Price — Attic, Crawlspace, or Closed Walls

Access changes labor hours drastically: attic or crawlspace access usually adds 10–20% to labor, while opening walls can add $25-$75 per linear ft of wall cut and repair. If ducts are inside finished walls, expect demolition and drywall repair costs that can double labor-related expenses.

Assumptions: attic access with normal insulation; wall work includes framing, drywall, and paint touch-ups.

Practical Ways To Reduce Ductwork Price Without Sacrificing Performance

Control scope: repair isolated leaks or replace only the trunk or specific branches instead of a full system; this can cut cost by 40%–70% on many homes. Choosing high-quality flex duct for non-visible runs, keeping supply register count minimal but properly sized, and doing basic prep work for the crew lower labor hours.

Examples: rerouting one run vs full rebuild; scheduling in slow seasons when contractors have lower rates.

How Long Installations Take and Typical Labor Rates

Typical total job time: 6–40 hours depending on scope; small repairs 2–6 hours, full-system installs 16–40 hours with a 2–3 person crew. Hourly labor rates for HVAC or duct specialists commonly range $75-$125 per hour.

Assumptions: crew works on-site; includes sealing, insulation, and register balancing.

Regional Price Differences and What To Expect in Key U.S. Markets

Prices vary by region: coastal metro areas are typically 10%–30% higher than interior markets; rural areas can be 5%–15% lower. Expect 20%–30% higher overall quotes in places like San Francisco, NYC metro, or Boston compared with Midwest or Southeast averages.

Example adjustment: a $6,000 average in the Midwest may be $7,200-$7,800 in a high-cost coastal metro.

Three Real-World Quote Examples With Specs and Totals

Scenario	Specs	Labor Hours	Price
Basic repair	4 supply runs, seal leaks in attic	3–6 hours	$300-$900
Partial replacement	Trunk + 6 branches, attic access, mid-grade flex	12–20 hours	$1,500-$4,500
Full new system	2,000 sq ft home, metal main trunks, 12 registers	24–40 hours	$4,000-$12,000

These examples show how scope, materials, and labor hours combine to produce widely different totals.