How to stop the garden from flooding during the winter

[Narmelleth]

(Re-posting from Gardening)

I could really use some advice as this is really getting me down.

The garden is a mess to the point I refuse to step foot outside. I want to redo the whole thing so I can finally enjoy it.

Only issue is that in the winter months for the last two years the garden started getting flooded. This is not a bit of water, a few puddles here and there.
This is properly knee deep water at its worse, ankle deep at the best case.

The garden backs up at private woodland and from what i have seen lots of the water enters from there when it rains.

Before I bother redoing the garden, is there anything I can do to sort the flooding?
Is blocking the back entrance with a barrier of sorts realistic?
Trying to raise the garden level so we are higher than the woods? Is that feasible?
I don't think rain gardens and planting a few water loving plants are going to cut it. There is so much water.

I don't want to spend money and energy fixing the garden only for the flooding to put me back to zero.

How would you tackle this?

(Someone said to talk to neighbours in the previous thread. DH did and apparently all the properties backing to the woods had a gully build but previous owners in order to expand their gardens extended the gardens and covered it?? Seems covering it is causing the flooding now, but I am unsure about all this as H is not the best information sharer and he is all doom and gloom right now and that nothing can be done with the gully to fix the issue. Or in general we just have to live with it...)

The gully might still be there but blocked. I would definitely look under that decking!
We have woods opposite us and every time it rains hard the run off and stream flood the road. There are gullies but they need clearing, however it is a privately owned wood and so the Parish Council can only ask....it's got worse recently. It's because the rain we get now is more heavy over shorter periods. This will only get worse with climate change.

I wouldn’t be calling anyone until I had been out there with a spade and had a good look. That costs nothing but is likely to tell you a lot.

If you don’t do anything, call in a professional and they start asking questions and all you can say is “I have no idea and I haven’t looked either”, you’ll look a right dill.

Get onto that pronto.

It sounds very worrying and anything you do might cause issues further on for other people. It sounds like the gully should be reinstated ,but also talk to the council/flood people about this.