The working
- 1. Floor plan2,200 sq ft on one floor, as a 1.5:1 rectangle = 38.3 ft × 57.4 ft2,200 sq ft
- 2. Add overhangs(38.3 ft + 3) × (57.4 ft + 3), for 1.5 ft eaves on every side2,496 sq ft footprint
- 3. Roof surface2,496 sq ft footprint × 1.118 (6/12 pitch multiplier)2,791 sq ft
- 4. Squares to order2,791 ÷ 100 = 27.9 squares, + 20% waste (cut-up (valleys, dormers) roof)33.5 squares
- 5. Installed2,791 sq ft × $4–$6 per sq ft (architectural asphalt shingles, HomeGuide, Nov 7, 2025)$11,163 – $16,745
- 6. Tear-off2,791 sq ft × $1–$3 per sq ft to remove one layer (HomeGuide)$2,791 – $8,373
- 7. PermitFlat fee, set locally (HomeGuide, Fixr)$100 – $500
- 8. Installed totalSum, rounded to $100 under $10,000 and $500 above$14,000 – $25,500
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 2,200 sq ft house at other pitches
| Pitch | Roof surface | Squares | Asphalt shingles | Standing-seam metal |
|---|---|---|---|---|
| 3/12 | 2,573 sq ft | 25.7 | $13,000 – $23,500 | $26,000 – $49,500 |
| 4/12 | 2,631 sq ft | 26.3 | $13,500 – $24,000 | $26,500 – $50,500 |
| 6/12 (this house) | 2,791 sq ft | 27.9 | $14,000 – $25,500 | $28,000 – $53,500 |
| 8/12 | 3,000 sq ft | 30.0 | $15,000 – $27,500 | $30,000 – $57,500 |
| 10/12 | 3,249 sq ft | 32.5 | $16,500 – $29,500 | $32,500 – $62,000 |
| 12/12 | 3,530 sq ft | 35.3 | $18,000 – $32,500 | $35,500 – $67,500 |
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 2,200 sq ft, one storey or two (6/12, cut-up (valleys, dormers) roof)
| House | Roof footprint | Squares | Asphalt shingles |
|---|---|---|---|
| One storey (this house) | 2,496 sq ft | 27.9 | $14,000 – $25,500 |
| Storey and a half | 1,710 sq ft | 19.1 | $9,700 – $17,500 |
| Two storeys | 1,312 sq ft | 14.7 | $7,400 – $13,500 |
Where the two wings meet, the roof forms valleys. Valleys need ice and water shield and careful cutting, so waste is about 20% and the job takes longer.
Materials to order (asphalt shingles, cut-up (valleys, dormers) roof)
| Material | Quantity | How it is worked out |
|---|---|---|
| Shingles | 101 bundles | 33.49 squares with 20% waste × 3 bundles per square |
| Synthetic underlayment | 4 rolls | 3,349 sq ft ÷ 1,000 sq ft per roll |
| Ice & water shield | 3 rolls | 3 ft along 122 ft of eaves + 3 ft along 18 ft of valleys, +5% laps |
| Starter strip | 3 bundles | 214 ft of eaves and rakes +5% ÷ 100 ft per bundle |
| Drip edge | 23 10 ft pieces | 214 ft of eaves and rakes +5% for laps |
| Hip & ridge cap | 3 bundles | 61 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 2,200 sq ft house roof?
About 27.9 squares for this one-storey L-shaped house at 6/12, or 33.5 to order with 20% waste. The tables show how storeys and pitch change that.
How many bundles of shingles for a 2,200 sq ft house?
About 101 bundles of architectural shingles at three bundles per square, including 20% waste for a cut-up (valleys, dormers) roof.
What would standing-seam metal cost instead?
About $28,000 – $53,500 installed on the same roof, against $14,000 – $25,500 for asphalt, including tear-off of one old layer and a permit.
Why do valleys add to the cost?
Valleys carry the most water, so they get ice and water shield and careful cutting. Here that means 3 rolls of ice and water shield and 20% shingle waste instead of 10%. Published ranges do not price valleys separately, so expect a cut-up roof in the top half of the range.
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 1,500 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 2,500 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