What is the average cost of ductwork replacement in Calgary in 2026?

Ductwork replacement in Calgary typically runs $3,000–$8,000 for a standard single-family home, with complex or larger homes reaching $10,000–$15,000+. The wide range reflects differences in home size, duct layout, accessibility, and materials chosen.

What Drives the Cost

The biggest factors are the size of your home and how accessible the existing ductwork is. A 1,200 sq ft bungalow with an open basement is a straightforward job — a 2,500 sq ft two-storey with ductwork running through finished walls and ceilings is a completely different animal. Here's a rough breakdown by scope:

• Partial replacement (main trunk line or a few branch runs): $1,500–$3,500
• Full replacement, unfinished basement (1,200–1,800 sq ft home): $3,000–$6,000
• Full replacement, finished basement or multi-storey (2,000–3,000 sq ft home): $6,000–$12,000
• Large or complex homes (3,500+ sq ft, custom layouts): $12,000–$18,000+

Material choice also matters. Sheet metal ductwork is the gold standard — more durable, better airflow, and longer-lasting, but it costs more upfront. Flexible duct (flex duct) is less expensive and faster to install, making it common for branch runs and tight spaces. Many Calgary HVAC contractors use a combination of both.

Calgary-Specific Considerations

Calgary's climate puts real demands on your HVAC system. Winters regularly hit -30°C, and the famous chinook cycles create extreme temperature swings that stress ductwork connections and seals over time. Older homes — particularly those 1960s–1980s bungalows and two-storeys common in communities like Lakeview, Dalhousie, and Acadia — often have original ductwork that's undersized by today's standards, poorly sealed, or made from older materials including fibreglass duct board that degrades over time.

If your home was built before 1990, it's worth having an HVAC technician assess whether your duct sizing is matched to your current furnace output. A high-efficiency 96%+ AFUE furnace (which is standard in new Calgary installs) paired with undersized or leaky old ductwork won't perform anywhere near its rated efficiency.

A building permit and HVAC permit are required for ductwork replacement in Calgary — issued through the City of Calgary (call 311 or visit calgaryplanningpermit.ca). A Safety Codes Officer will inspect the work. Any reputable HVAC contractor will pull these permits as part of the job. If a contractor offers to skip the permit to save money, walk away.

When to Replace vs. Repair

Duct sealing and minor repairs (mastic sealant, insulation wrap, reconnecting loose joints) can run $500–$1,500 and are worth doing if your ductwork is otherwise in good shape. Full replacement makes more sense when ducts are corroded, crushed, significantly undersized, or made from materials like asbestos-containing duct wrap (common in pre-1980 Calgary homes — requires professional abatement before any duct work).

Signs you likely need replacement rather than repair: uneven heating throughout the house, rooms that never get warm in winter, visible rust or damage, a musty smell from vents, or a system that's simply 30+ years old.

Get at least three quotes from licensed HVAC contractors and ask each one to specify what's included — labour, materials, permit fees, and disposal of old ductwork. You can find qualified HVAC professionals through the Calgary Construction Network directory to compare local contractors.