There is a tall eucalyptus in the garden, approx 11 metres away from the house. I've no idea that tree roots can cause foundation problems until now. Have been in this property for four years and now it seems the tree is getting way too high. I'm going to call in a tree surgeon next week to see what can be done. But meanwhile, I've noticed a few inches long hairline crack above the kitchen. Not sure when did it first appeared, but could it be subsidence due to the tree?