Connie: You can get a general idea of costs here: https://porch.com/project-cost/cost-to-install-wood-decking however, support framing and use of composite materials will add to the cost. Best is to have a local pro visit the site and determine conditions, deck options and costs. You can search for a local deck contractor here: https://porch.com/commerce-city-co/contractors. Or you can call us to get started at 855-494-5972. Thank you.