Hi, I have a garden which is subject to water logging. It's 65m2 and slopes away from my house toward a field at the back of the garden. How much would it cost to have done professionally, as I am incapacitated.
Without seeing the site, and working out just where all this land drainage can outfall, or even if it can outfall anywhere, it's impossible to say what sort of costs you're looking at. It could be a thou; it could be ten thou.