Generally, homeowners do not need permission to cut down a tree on their own private property, but there are several exceptions where a permit may be required. You might need a permit if the tree is particularly large, old, or a protected species, such as a heritage tree. Trees located near public property or power lines can also be subject to special rules. Additionally, many local governments and homeowners associations (HOAs) have regulations controlling which trees can be removed to manage an area's appearance or prevent the spread of invasive species. To avoid hefty fines, it is crucial to check with your local government and HOA to determine if a permit is needed before you begin.

The best time to cut down a tree is during its dormant season, typically in winter or early spring, after all the leaves have fallen. Removing a tree during this period is advantageous for several reasons. Frozen ground helps secure the tree stump, protects the surrounding landscape from damage, and reduces the risk of the tree falling in an unintended direction. With the leaves gone, there is less risk of the tree's foliage getting tangled with other trees. Additionally, since this is often a slower season for tree services, you may be able to hire a professional at a lower rate. This dormant period is also the best time for tree trimming.

The best time to trim trees is in late fall through winter when the tree has slowed its growing for the year. Cold weather stops insects and fungal growth from attacking a new tree wound. Summer and fall are considered the worst times to trim trees, but it’s permissible in certain scenarios, such as tree disease, damaged branches, or small, aesthetic cuts.

Your neighbor is not in a good position to know if your trees are truly dead or pose any kind of danger. That’s why hiring an arborist or tree service expert can be such an important part of the process. If the trees are still alive and don’t pose any threat, you’re in the clear (but you may want to document and photograph everything in case events turn sour down the road).

But if a tree is visibly dead and near the property line, you should remove it to be safe. If a dead tree falls on a neighbor’s property, they may have grounds to sue for negligence. If any branches on trees have died, it’s a good idea to cut them back for similar reasons.