It looks to me like a gournsey lily, but I can't claim to be an expert. I have some growing in my yard.

The close up makes it certain that it's neither sumac or tree of heaven. Black walnut is a good possibility. In any case, it seems way too close to the house. Personally, I would remove it. You may find it is going to be destructive and terribly, terribly messy.

You can sometimes have fairly large sassafras trees with every leaf unlobed. Very confusing first time you see it. Crushed sassafras leaves have a distinctive odor. Not the same as the bark, but distinctive. Find a known sassafras tree, crush a couple of leaves. See how their odor compares with your mystery plant.

It's rubra. I have that leaf etched in my mind. Agree with Embothrium.... last years acorn caps on the ground or full acorns in combination with leaf is key to identification for most folks. The most serious of folks and experts know the buds, too. Dax