how much does a large pond liner cost?
A shallow 4' x 6' or 6' x 8' professionally-installed pond, including excavation, liner, filtration system, and simple rock border might cost $2,000 to $3,500. As a DIY project, the same pond might cost $500 to $1,000. Larger ponds, depending on features and equipment, can easily cost $5,000 to $15,000 or more.