The working
- 1. Floor plan1,200 sq ft on one floor, as a 1.5:1 rectangle = 28.3 ft × 42.4 ft1,200 sq ft
- 2. Add overhangs(28.3 ft + 3) × (42.4 ft + 3), for 1.5 ft eaves on every side1,421 sq ft footprint
- 3. Roof surface1,421 sq ft footprint × 1.083 (5/12 pitch multiplier)1,540 sq ft
- 4. Squares to order1,540 ÷ 100 = 15.4 squares, + 15% waste (hip roof)17.7 squares
- 5. Installed1,540 sq ft × $4–$6 per sq ft (architectural asphalt shingles, HomeGuide, Nov 7, 2025)$6,158 – $9,237
- 6. Tear-off1,540 sq ft × $1–$3 per sq ft to remove one layer (HomeGuide)$1,540 – $4,619
- 7. PermitFlat fee, set locally (HomeGuide, Fixr)$100 – $500
- 8. Installed totalSum, rounded to $100 under $10,000 and $500 above$7,800 – $14,500
Prices are published national installed ranges (mostly HomeGuide, updated Nov 7, 2025), the same ones the roof cost calculator uses, for a straightforward re-roof with one old layer torn off. They are not adjusted for your state; the calculator can do that. Decking repairs, access, steep or cut-up roofs and the contractor all move the final price, so get at least two written quotes.
Squares and the materials list come from the same math as the roof calculator, which works them out for your own measurements.
This 1,200 sq ft house at other pitches
| Pitch | Roof surface | Squares | Asphalt shingles | Standing-seam metal |
|---|---|---|---|---|
| 3/12 | 1,465 sq ft | 14.6 | $7,400 – $13,500 | $14,500 – $28,500 |
| 4/12 | 1,498 sq ft | 15.0 | $7,600 – $14,000 | $15,000 – $29,000 |
| 6/12 | 1,589 sq ft | 15.9 | $8,000 – $15,000 | $16,000 – $30,500 |
| 8/12 | 1,708 sq ft | 17.1 | $8,600 – $16,000 | $17,000 – $33,000 |
| 10/12 | 1,850 sq ft | 18.5 | $9,300 – $17,000 | $18,500 – $35,500 |
| 12/12 | 2,010 sq ft | 20.1 | $10,000 – $18,500 | $20,000 – $38,500 |
Published ranges are priced per square foot of roof, so a steeper pitch costs more here only because it has more roof. Many roofers also add a steep-roof charge from about 7/12 or 8/12.
Same 1,200 sq ft, one storey or two (5/12, hip roof)
| House | Roof footprint | Squares | Asphalt shingles |
|---|---|---|---|
| One storey (this house) | 1,421 sq ft | 15.4 | $7,800 – $14,500 |
| Storey and a half | 982 sq ft | 10.6 | $5,400 – $10,000 |
| Two storeys | 759 sq ft | 8.2 | $4,200 – $7,900 |
A hip roof slopes on all four sides. It sheds wind well, but every hip line needs ridge cap and angled cuts, so waste rises to about 15%.
Materials to order (asphalt shingles, hip roof)
| Material | Quantity | How it is worked out |
|---|---|---|
| Shingles | 54 bundles | 17.7 squares with 15% waste × 3 bundles per square |
| Synthetic underlayment | 2 rolls | 1,770 sq ft ÷ 1,000 sq ft per roll |
| Ice & water shield | 3 rolls | 3 ft along 154 ft of eaves, +5% laps |
| Starter strip | 2 bundles | 154 ft of eaves and rakes +5% ÷ 100 ft per bundle |
| Drip edge | 17 10 ft pieces | 154 ft of eaves and rakes +5% for laps |
| Hip & ridge cap | 5 bundles | 106 ft of ridges and hips +5% ÷ 25 ft per bundle |
Did hail hit your area? Insurance often covers hail damage. Check hail history for your city, with storm reports back to 1955.
Questions people ask
How many squares is a 1,200 sq ft house roof?
About 15.4 squares for this one-storey ranch with a hip roof at 5/12, or 17.7 to order with 15% waste. The tables show how storeys and pitch change that.
How many bundles of shingles for a 1,200 sq ft house?
About 54 bundles of architectural shingles at three bundles per square, including 15% waste for a hip roof.
What would standing-seam metal cost instead?
About $15,500 – $30,000 installed on the same roof, against $7,800 – $14,500 for asphalt, including tear-off of one old layer and a permit.
Does a hip roof cost more than a gable roof?
At the same pitch over the same footprint, a hip and a gable roof have the same area, so published per-square-foot prices give the same $7,800 – $14,500. The hip roof needs more material: 17.7 squares to order against 16.9, because hips waste more shingles, and roofers often price the extra cutting in.
More roof cost guides
- Roof cost for a 1,000 sq ft house
- Roof cost for a 1,500 sq ft house
- Roof cost for a 1,800 sq ft house
- Roof cost for a 2,000 sq ft house
- Roof cost for a 2,200 sq ft house
- Roof cost for a 2,500 sq ft house
- Roof cost for a 3,000 sq ft house
- Roof cost for a 3,500 sq ft house
- Roof cost for a 4,000 sq ft house
- Flat roof cost and squares
- 3/12 pitch roof: multiplier, angle and cost
- 4/12 pitch roof: multiplier, angle and cost
- 5/12 pitch roof: multiplier, angle and cost