average cost to replace roof per square
The actual cost of a flat roof depends on your location, the materials used, the complexity of the installation, and other factors. 1  Building a flat roof costs approximately $1.50 to $10.00 per square foot. 2  Assuming an average roof size of 1,500 square feet, that s a total cost of $2,250 to $15,000.
This post builds on one of earlier posts about commercial roof maintenance costs. How much does a commercial roof replacement cost? One study reports on a roof with average dimensions of 10,000 square feet, a new commercial roof can cost over $42,500, or over $4.25 per square foot.That study also found 80% of the roofs tracked had been replaced before they needed to be.ow much does a commercial roof replacement cost? One study reports on a roof with average dimensions of 10,000 square feet, a new commercial roof can cost over $42,500, or over $4.25 per square foot. That study also found 80% of the roofs tracked had been replaced before they needed to be.