The Costs. Minimum Cost: $5.92 per square foot. Maximum Cost: $11.19 per square foot. Basic interlocking tile installations generally cost homeowners between $525 and $725 total for a project of 100 square feet, which includes $355 to $400 for the materials and $170 to $330 for the labor.hen a homeowner chooses to have professionals install interlocking tiles, the cost generally includes all the materials needed for the job as well as the cost of transporting all workers and materials to and from the job site.