Estimate Squares Before Comparing Cost
Use the roofing squares calculator to estimate how many squares your roof may require. Cost per square is more useful when you understand the approximate roof size behind the quote.
What Cost Per Square Means
A roofing square is 100 square feet. If a roof replacement quote is priced per square, it is pricing the work in 100-square-foot units. However, two contractors may define that price differently.
One quote might include tear-off, underlayment, starter, ridge cap, flashing, disposal, and cleanup. Another might list some of those items separately. That is why scope comparison matters.
Factors That Change Cost Per Square
| Factor | How it can affect cost |
|---|---|
| Material | 3-tab, architectural, designer shingles, metal, tile, and slate have different product and labor requirements. |
| Pitch | Steeper roofs can require more safety setup and slower installation. |
| Tear-off | Removing old roofing and disposal add labor and dump fees. |
| Decking | Damaged decking is often priced separately by sheet or board. |
| Flashing and ventilation | Quality roof-system details can change the scope and long-term performance. |
How to Compare Quotes Fairly
Ask each contractor what is included per square and what is separate. Review shingle product, underlayment, flashing, drip edge, ridge vent, pipe boots, decking allowance, cleanup, warranty, and payment terms.