All in all, a contractor will typically take the following factors into account when setting the cost of tree removal:

• Location - Trees that are located precariously next to buildings, fences or other structures will come with a higher fee than those out in the open. The more risks and obstacles there are in removing a tree, the more expensive it will likely be.
• Height – Taller trees require the contractor to approach the removal in pieces. They’ll use specialized equipment (like cherry pickers, for instance) or ropes to climb the tree and cut it into smaller, more easily transported segments. This not only requires more work, but it also means a longer job on the whole.
• Condition – Healthy, strong trees are harder to cut down than dead or rotting ones. Trees that are not in healthy condition usually come with lower fees to remove.
• Diameter – Overall width of the tree, just like height, also plays a large role in removal price. Thicker trees will need to be broken down into smaller pieces and take longer to remove. They come with higher removal fees than smaller, thinner trees.

To know more about How much does it cost to fell a tree?

Tree removal means to cut down the tree, take it away, and usually, remove the stump from the ground. Tree trimming means to cut off parts of some of the tree branches to improve the tree’s health, shape, light penetration, or fruit/flowering.

Please note re: tree trimming. The type of trimming known as topping is a terrible thing to do to a tree, is never justified, and any tree service who does it should be severely fined. The Myth of Tree Topping

In addition, when planting a tree or bush, take into account the mature size, and don’t plant something too tall. You can’t make a 50′ tree stay at 20′ by constantly trimming it.