Waterproofing a basement costs between $400 and $2,500, on average. The cost depends on several factors, including the type and extent of waterproofing, as well as the amount of labor involved to complete the job. For example, to repair a foundation crack the cost to apply a concrete sealer and inject the crack is $400. Adding an interior drainage system costs approximately $70-$115 per linear foot.
Here is a link to a google news article regarding the costs related.