How much vinyl siding should cost. Average costs and comments from CostHelper’s team of professional journalists and community of users. Range from less than $ square foot for do it yourself panels from a building supply store to $ $ or more if installed by a contractor..Insulated vinyl siding or just vinyl siding can be a great alternative for your next project. Learn the cost, benefits, and problems with using it..What does vinyl siding cost? When you a contractor and ask him ‘what do you charge to install vinyl siding’? He will say something like ‘we charge about $ to $ per square foot of siding installed’..The cost to Install Vinyl Siding starts at $. $. per square foot, but can vary significantly with site conditions and options. Get fair costs for your SPECIFIC project requirements..