That is Sumac. I'm not exactly sure which species that is, but it is a very weedy shrub/tree that grows from suckers underground. They can be very pretty in the fall, but you wouldn't want them in any kind of formal landscaping.
On several occasions I've seen landscapers installing Sumac for its fall color and seed heads, but in each case they put them in as if the plants would stay put and never multiply
At our old place we had a large stand of staghorn sumac along the small hill on the side. Worked great there as it blocked the view of the mailboxes and helped to hold up the hill, plus they can be pretty. If any got into the garden on that side we would dig and pull up the runners.
Hope that helps!
Chris