How do I have my landscape collide with my previously placed static mesh

Here’s a picture of what i’m woking on. I want to edit the landscape and raise it directly against the house but not protrude through the floor and the wall when I raise directly against the house. Sorry if this is a dumb question, I am a unreal noob.

Try using the flatten tool . It will help you get the land to the desired height . Flatten | Unreal Engine Documentation
Then use the smooth tool of landscape editor to make the edges smooth . Adjust the brushes accordingly .

I will give that a try but im not sure how well it will work considering the landscape needs to rais from the first floor all the way to the second floor in height from front to back. Is there a way to prevent any landscape editing from spilling over onto the other sides of the walls?