Duct Sealing Cost Per Square Foot
DUCT SEALING PROS · PRICING
Duct Sealing Cost Per Square Foot: Estimates by Home Size
Duct sealing cost per square foot is about $0.50 to $1.50 according to Angi. That gives a rough starting range by home size, but the real price depends on access, duct layout and how leaky the system is.
Duct sealing cost per square foot: the basic math
Angi lists duct sealing at $500 to $4,000 overall, with an average of about $2,250, and about $0.50 to $1.50 per square foot. Multiply your home’s square footage by those two figures and you have a rough range.
The table below is simple arithmetic from that published range. It is not a quote, and it does not account for your ducts. Use it to see whether a quote is in the neighborhood, not to set a price.
For a rough sense of scale, a typical mid-size home lands in the low thousands, which matches Angi’s average of about $2,250. Treat the average as a midpoint, because half of all jobs fall on either side of it and your own number depends on what the test finds.
Estimates by home size
| Home size | At $0.50 per sq ft | At $1.50 per sq ft |
|---|---|---|
| 1,200 sq ft | $600 | $1,800 |
| 1,800 sq ft | $900 | $2,700 |
| 2,400 sq ft | $1,200 | $3,600 |
| 3,000 sq ft | $1,500 | $4,500 |
Notice that the largest figure passes Angi’s $4,000 overall ceiling. That is a sign per-square-foot math is only a guide. Real jobs depend on the system, not just the floor area.
If your home is on the edge of a size band, use both rows and read the gap between them. A split-level or two-story layout can need more duct work than a single-story home of the same floor area, because the duct runs are longer and harder to reach.
What moves the price
- Access: tight attics and buried ducts take longer.
- Leakage: a very leaky system needs more sealing.
- Number of systems: two units mean two duct runs.
- Repairs: torn or crushed ducts add cost. Angi lists repairs at about $660.
- Testing: a pressure test is about $300, with a typical range of $200 to $450.
Duct sealing cost per square foot hides all of these. A small home with awful access can cost more than a larger, easy one.
How to use the estimate
Get a test first so the quote is based on measurement. Then compare two or three written quotes using our quote comparison guide. Most jobs take about 4 hours, with a range of 2 to 8. For the full breakdown, see duct sealing cost in St. George.
If a quote is far above the range, ask what is driving it. If it is far below, ask what is missing, such as a test or approved materials. Duct sealing cost per square foot is a sanity check, not a contract. Our payback worksheet shows how to weigh price against your cooling costs.
When you collect quotes, ask each contractor to show how the number was built: test, labor, materials and any repairs. A clear breakdown makes duct sealing cost per square foot comparisons honest, and it shows you where one offer is padding or skipping a step.
Before you decide
Write down your home’s square footage, the number of systems and what symptoms you notice. Then use the range to judge whether a quote makes sense. Duct sealing cost per square foot works best as a first filter. A test and a written scope decide the rest, and the replacement comparison helps if the ducts are beyond repair.
Frequently asked questions
What is the cost per square foot?
Angi lists about $0.50 to $1.50 per square foot.
Is the table a quote?
No. It is arithmetic from a published range, not a price for your home.
Why do quotes differ?
Access, leakage, number of systems, repairs and testing all change the price.
Does size always decide the price?
No. A small home with poor access can cost more than a larger, easy one.
Ready to find out where your cool air is going?
Call us and tell us which rooms are giving you trouble. We will explain what a duct leakage test involves and book your duct sealing services St George crews can finish before the next heat wave.
Duct Sealing Pros
3430 S River Rd, St. George, UT 84790
(435) 281-0395
