For instance, if a shed or garage roof needs a small hole patching, you would be looking to pay about £280. It is very important to note that the price fluctuates depending on various factors such as: How Much Does a Roof Replacement Cost Roof replacement The job averages $1,000 to $1,500. How much to replace a roof on a house . For a 2200 square foot house,. Some contractors charge hourly, which can run from $40 to $80 per hour. Pitch size how it is installed on your deck/frame supplies and products code requirements layers If there is either extensive damage or your roof is about 20 years old, and it needs replacing, the average price to replace your roof is around $7,211. The cost of replacing a roof varies based on numerous factors. The removal of an old roof can cost $1 to $5 per square foot. Material factors also affect roof replacement costs. Metal roofing costs between $5.50 to $14 per square foot installed vs. Gaf asphalt roofing system how much does a ne...