I tried to expand my house , but when i destroyed the walls , there were piles of rubble everywhere.
They cannot be cleared with shovel and jackhammering them just makes it worse.
Have you tried examining with a shovel in your inventory? (an actual shovel?)
yes , i even tried with debug menu. All i have left is explosives which i will try later.
IIRC this is a problem with the rubble field created when ceilings collapse. I don’t think there is actually any way to remove it right now.