Who do i call to help me with yard drainage problems?
My yard is not draining properly and I do not seem to have any yard drainage. Unfortunately heavy rain water is ending up in my crawl space under the house.
Who do i call to install a yard drainage system? Will the local authority help or do I need to call in a private drainage contractor?

Don’t call a plumber they deal with leaks and pipes- a landscape architect or a drainage contractor would be most helpful to you as they probably have experience of yard drainage too.
Call a landscaper.. to put in new dirt and grade away from your house.. and check that they have previously delt with yard drainage and not just large gardens. Otherwise the local drains company.
We do that, drainage contractors deal with these problems every week. If you cannot find one (Dynorod are good) then look under Landscape contractors in the phone book. It’ll be a lot cheaper than a plumber.
As an off the wall thought for your yard drainage problem – usually concrete company have knowledge of grating and how water should fall so perhaps they could help.