The cost of outside drain unblocking can vary depending on what is causing the blockage. If it’s just debris then it will be cheaper than if there is a tree root or other solid material that needs to be removed.
It also depends on how deep the pipe is, and whether or not you have an internal pipe that needs to be cleared as well.
Generally, the cost to have a drainage professional fix your blocked drain depends on a few factors including:
The size of the pipe and how long it has been blocked for;
The type of blockage
The location of the pipe within the property.
The average cost of outside drain unblocking is £150-£200, but if there are any complications such as large objects blocking your drain then this could increase the price.