A 2,500 sq ft house may be compact and multi-story or wide and single-story. Those layouts can produce very different roof quantities and access requirements.
Calculate roofing squares
Use actual roof surface in the Roofing Square Calculator and add a realistic waste allowance for cuts and roof geometry.
Build a material-specific budget
Then enter roof area and material in the Roof Replacement Cost Calculator. Adjust complexity, stories, tear-off and local market level.
Watch decking allowances
Larger projects make hidden deck repair allowances more important. Ask how damaged sheathing will be priced if discovered after tear-off.
Separate size from complexity
A large simple gable roof can be easier to install than a smaller roof with dormers, valleys, skylights and steep sections.
Run your own numbers: Use the Roof Replacement Cost Calculator after confirming roof area.