average cost of sewer cleanup
1 According to Homeadvisor.com, the average cost of cleaning a drain is $251. 2  Homewyse.com places the average cost of clearing a sewer between $142.34 and $157.55 per sewer line. Most jobs, on average, should not be any more than $300. 2  However, there can be complex jobs that require video inspections and chemicals that can cost more than $300 or more. 3  According to Homeadvisor.com, the average cost of cleaning a drain is $251.