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Confidence votes 713. It depends on the type of roof. A single story low pitch asphalt shingle roof will cost around $40 - $80 per square (100 sq. ft.) to tear off and $75 - $100 per square to install new shingles. If the plywood sheathing underneath is damaged, it will cost extra, up to $50 per sheet replaced.
The average installation price of a standing seam metal roof: $1000-1200 per square (100 sq. ft.) of roof area on a 1-story, walkable gable roof, including tear-off, breathable synthetic underlayment such as GAF DeckArmor, clips+screws, Z-flashing, ridge-vent and snow-guards above doors (walkways) and used garage doors.hile $320 / square may be a bit high for some parts of the country, here in Boston and most of New England, some legit roofers wonât touch a roof for less than $400 per square and going average is $350 for walkable 1 layer tear-off, with new 30-year architectural.