Changing shingles? Thinking of changing the shingles on a roof beside 1108 square...

Thinking of changing the shingles on a roof beside 1108 square feet. How much would it roughly cost contained by Toronto? And what are some good companies to travel with? Thanks
Answers:    Get three estimates beside and including a tear-off of the existing shingles. Shingles are a very much commodity product and hold different warranty years on different lines. GAF, Owens Corning, Certainteed, are just a few procession of manufactures. I would also tolerate them measure the roof and bid suitably. labor should be the biggest difference in the bids. moral luck.