The working
- 1. Floor plan1,500 sq ft ÷ 1.5 storeys = 1,000 sq ft per floor = 25.8 ft × 38.7 ft1,000 sq ft
- 2. Add overhangs(25.8 ft + 3) × (38.7 ft + 3), for 1.5 ft eaves on every side1,203 sq ft footprint
- 3. Roof surface1,203 sq ft footprint × 1.302 (10/12 pitch multiplier)1,565 sq ft
- 4. Squares to order1,565 ÷ 100 = 15.7 squares, + 10% waste (gable roof)17.2 squares
- 5. Installed1,565 sq ft × $4–$6 per sq ft (architectural asphalt shingles, HomeGuide, Nov 7, 2025)$6,262 – $9,393
- 6. Tear-off1,565 sq ft × $1–$3 per sq ft to remove one layer (HomeGuide)$1,565 – $4,696
- 7. PermitFlat fee, set locally (HomeGuide, Fixr)$100 – $500
- 8. Installed totalSum, rounded to $100 under $10,000 and $500 above$7,900 – $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 1,500 sq ft house at other pitches
| Pitch | Roof surface | Squares | Asphalt shingles | Standing-seam metal |
|---|---|---|---|---|
| 3/12 | 1,240 sq ft | 12.4 | $6,300 – $11,500 | $12,500 – $24,000 |
| 4/12 | 1,268 sq ft | 12.7 | $6,400 – $12,000 | $13,000 – $24,500 |
| 6/12 | 1,345 sq ft | 13.4 | $6,800 – $12,500 | $13,500 – $26,000 |
| 8/12 | 1,445 sq ft | 14.5 | $7,300 – $13,500 | $14,500 – $28,000 |
| 10/12 (this house) | 1,565 sq ft | 15.7 | $7,900 – $14,500 | $16,000 – $30,000 |
| 12/12 | 1,701 sq ft | 17.0 | $8,600 – $16,000 | $17,000 – $33,000 |
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 1,500 sq ft, one storey or two (10/12, gable roof)
| House | Roof footprint | Squares | Asphalt shingles |
|---|---|---|---|
| One storey | 1,746 sq ft | 22.7 | $11,500 – $21,000 |
| Storey and a half (this house) | 1,203 sq ft | 15.7 | $7,900 – $14,500 |
| Two storeys | 927 sq ft | 12.1 | $6,100 – $11,500 |
Cape Cods have a small footprint but a steep roof. At 10/12 crews work from roof jacks and harnesses, and many contractors add a steep-roof charge, so expect the top half of each range.
Materials to order (asphalt shingles, gable roof)
| Material | Quantity | How it is worked out |
|---|---|---|
| Shingles | 52 bundles | 17.22 squares with 10% waste × 3 bundles per square |
| Synthetic underlayment | 2 rolls | 1,722 sq ft ÷ 1,000 sq ft per roll |
| Ice & water shield | 2 rolls | 3 ft along 85 ft of eaves, +5% laps |
| Starter strip | 2 bundles | 159 ft of eaves and rakes +5% ÷ 100 ft per bundle |
| Drip edge | 17 10 ft pieces | 159 ft of eaves and rakes +5% for laps |
| Hip & ridge cap | 2 bundles | 42 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 1,500 sq ft house roof?
About 15.7 squares for this storey-and-a-half Cape Cod at 10/12, or 17.2 to order with 10% waste. The tables show how storeys and pitch change that.
How many bundles of shingles for a 1,500 sq ft house?
About 52 bundles of architectural shingles at three bundles per square, including 10% waste for a gable roof.
What would standing-seam metal cost instead?
About $16,000 – $30,000 installed on the same roof, against $7,900 – $14,500 for asphalt, including tear-off of one old layer and a permit.
Is a 1,500 sq ft storey-and-a-half roof cheaper than a ranch?
Usually, yes. Spread over a storey and a half, the house needs about 15.7 squares instead of 22.7 for a one-storey 1,500 sq ft ranch at the same 10/12 pitch: about $7,900 – $14,500 against $11,500 – $21,000.
More roof cost guides
- Roof cost for a 1,000 sq ft house
- Roof cost for a 1,200 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