Water logged Garden in new build house how deep to dig in stone drain
by
BigMckenzie
Related Discussions
Suggested Project Book
This is a discussion about pretty much the same question - possibly near your area. Most who answered said it's worth digging the clay up and adding top soil plus drains. Read the article to see if it will help.
http://www.gardenersworld.com/forum/problem-solving/new-build-house-waterlogged-garden---clay-soil/948578.html
Good luck!
I would dig down at least 18" to 24"
If the house is not on higher ground it needs to be far enough below your foundation that the house can never be flooded.