Here’s a surprise – Trees grow bigger once you plant them!
For realsies, though, it is surprising how many people plant trees either too close to a structure, right under power lines, or without thinking of how big they actually get. The house we moved into three years ago had four trees that were 30-35 years old. Every single tree was planted in a problem area! We have had to massively prune each of them to reduce canopy size or avoid wires, and we may end up needing to remove them.
So how do you plan appropriately? First, look up their mature size. Many native eastern woodland trees, for example, grow upwards of 80 feet, with a 50-60 foot spread. Make sure there are no structures within that mature zone.
Just as importantly, the roots may cause problems if a tree is planted too closely to a structure. It is much more difficult to tell the size and pattern of mature root growth, but at least try to look it up. A general rule is that the root zone will be as wide as the canopy. However, some trees go wider, especially as they mature.
The silver maple is another such problem tree. Not only does it have the breakage issues shared by the Bradford Pear, but it also shoots surface roots out much farther than the canopy. These roots tear up sidewalks and foundations all across the eastern US suburbs.
So plan appropriately