How much does air duct replacement cost for a typical home?

Air duct replacement cost for a typical home is confirmed only after an in‑home assessment that measures your system and designs the new runs. The biggest swing comes from total scope and how accessible the ducts are, and full replacements are usually priced as a complete project rather than per foot. If ducts are crushed, contaminated, or badly undersized, replacement is the smarter fix; otherwise sealing or targeted repairs can be more cost‑effective. We complete whole‑home duct projects across Greater Boston, and many older homes near Newton need custom transitions instead of simple swaps. A small but real price driver we see is ceiling finish work when ducts sit behind plaster rather than open joists.

Key factors that change total price:

• Home size and the count of supply and return runs
• Duct material and required insulation (steel, duct board, or flex)
• Access points (attic, crawlspace, finished ceilings) and any patching
• System testing, sealing, and final air balancing

Ask for a written, itemized proposal after a site visit so you can compare repair versus replacement before you commit.

Updated: 2026-03-14

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