How much is it? On average, installing a backsplash can range in price from $13 to as much as $24 per square foot. This will not include the tile and supplies, but is for installation only. For example, a 25 square foot space could cost anywhere from $325 to as much as $600. On a forum thread on the website Gardenweb.com, homeowners claimed that they paid around $550 to install a 42 square foot area; some paid as much as $30 per square foot to have the backsplash installed.