Reference
Roof size by house size
Rough roofing squares for common house sizes, at pitches from 4/12 to 8/12. Pick a size for a table by pitch, bundle counts and an early budget range.
| House size | 1 story (squares) | 2 story (squares) |
|---|---|---|
| 1,000 sq ft | 11.6–13.2 | 5.8–6.6 |
| 1,200 sq ft | 13.9–15.9 | 7–7.9 |
| 1,300 sq ft | 15.1–17.2 | 7.5–8.6 |
| 1,400 sq ft | 16.2–18.5 | 8.1–9.3 |
| 1,500 sq ft | 17.4–19.8 | 8.7–9.9 |
| 1,600 sq ft | 18.6–21.2 | 9.3–10.6 |
| 1,700 sq ft | 19.7–22.5 | 9.9–11.2 |
| 1,800 sq ft | 20.9–23.8 | 10.4–11.9 |
| 2,000 sq ft | 23.2–26.4 | 11.6–13.2 |
| 2,200 sq ft | 25.5–29.1 | 12.8–14.5 |
| 2,400 sq ft | 27.8–31.7 | 13.9–15.9 |
| 2,500 sq ft | 29–33.1 | 14.5–16.5 |
| 2,800 sq ft | 32.5–37 | 16.2–18.5 |
| 3,000 sq ft | 34.8–39.7 | 17.4–19.8 |
| 3,500 sq ft | 40.6–46.3 | 20.3–23.1 |
| 4,000 sq ft | 46.4–52.9 | 23.2–26.4 |
Estimates assume footprint = living area ÷ stories, a 10% overhang allowance and one uniform pitch. For your actual roof, use the roof size calculator or a measurement report.
Frequently asked questions
Is house square footage the same as roof square footage?
No. The roof covers the footprint plus overhangs, and a sloped roof has more surface than the ground under it. A two-story house has a smaller roof than a one-story house with the same living area.
What is a roofing square?
One hundred square feet of roof surface. Roofers price and order materials by the square.