I'd wait to see what it is because if it is one of those beautiful China rose you may just want to keep it.
Are you sure your gardener planted it?
This is what my dad said.This looks like what we in my area we call weed trees.
Southern CA.
It does look like a chestnut now that I have my bifocals on. I would move it or remove it as it is too close it appears to both the house and the street. I have never understood why people plant trees close to homes and driveways and even close to property lines when they should consider the diameter of the fully grown tree and plant such that they fit on their property.