- Roof type and material. Foam, tile, shingle, metal, and membrane systems involve very different labor and material.
- Size and shape. More valleys, hips, levels, and penetrations mean more labor and flashing.
- Pitch. Steeper roofs need more safety equipment and time.
- Removal. The number of existing layers and the weight of materials like tile affect tear-off and disposal.
- Deck condition. Rotted or damaged sheathing found during tear-off adds cost; ask how it is priced.
- Drainage fixes. Adding crickets, re-sloping, or new scuppers on flat roofs.
- Access. Tight lots, landscaping, and distance from the street.
- Permits and HOA requirements. Some HOAs require specific tile colors or profiles.
- Add-ons. Insulation upgrades, new skylights, solar removal and reinstall.
How to get a clear number
Ask for a written estimate that lists each of these items, and get more than one if you can. See our guide on comparing roofing estimates.