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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.
Steel shingle metal roof: Installation can cost at least $600 per square foot for the shingles. Or run $750 per square foot for a standing seam steel roof. Aluminum metal roof: Can cost anywhere between $700 and $1,200 per square foot. Copper and zinc metal roofs: Averages $800 to $1,100 to purchase the materials. Installation costs around $700 to $1,200 per square foot.