We moved into a new build house a few months ago. We have had turf laid to most of the garden and a flower bed to the back. The problem is the grass is permanently under water. It's not just a bit squelchy, there is s layer of water over the grass at all times even if it hasn't rained. The ground isn't great and seems to be full of builders rubble and clay.
The water smells and the grass is rotting and dying. We have had a French drain fitted that is linked into a manhole cover in our garden but this has had no effect, in some places it is now actually worse.
We have had the plans checked and been told there are no water pipes running under the garden that could be leaking.
Please if anybody has any ideas to what could be going on I would really appreciate it.