Furnace Replacement Cost by Home Size
September 8, 2026 2 min read
Bigger homes need more heating capacity, and more capacity costs more — but not as much more as people assume. The jump from a small home to a large one is usually a few thousand dollars, not double. Here is how installed pricing tends to scale.
Estimated installed price by home size
| Home size | Good (80%) | Better (96%) | Best (96%+ variable) |
|---|---|---|---|
| 1,000 sq. ft. | $3,900 – $5,700 | $6,800 – $8,400 | $8,700 – $10,900 |
| 1,500 sq. ft. | $4,400 – $6,200 | $7,400 – $9,000 | $9,400 – $11,600 |
| 2,000 sq. ft. | $4,400 – $6,200 | $7,400 – $9,000 | $9,400 – $11,600 |
| 2,500 sq. ft. | $5,050 – $6,850 | $8,150 – $9,750 | $10,250 – $12,450 |
| 3,000+ sq. ft. | $5,800 – $7,600 | $9,000 – $10,600 | $11,200 – $13,400 |
National mid-range estimates. High-cost metros commonly run 15–30% above these; many lower-cost markets run below them.
Why the size premium is smaller than expected
A 100,000 BTU furnace does not cost twice what a 60,000 BTU furnace costs. The labor is nearly identical — same removal, same connections, same startup — and the equipment step-up is modest. What actually separates a cheap project from an expensive one is usually access, venting and required updates, not capacity.
Where larger homes do pay more
- Two-story layouts with long duct runs and uneven upstairs temperatures
- Homes that need zoning or a second system to heat evenly
- Duct modifications to move the higher airflow a larger furnace requires
- Longer venting runs to reach an exterior wall
Ranges are estimated fully installed prices — furnace, standard installation labor, basic materials, removal of the old furnace, startup and testing. Local labor rates, venting and any required updates move the final number.