Hope that you have an agreement with your neighbor that allowed this and did not require him to remove it at his expense, because if not it is possible, depending on the laws of the state where this is the situation, your neighbor may have obtained legal rights to the land immediately beneath that part of the barn, through what's called "adverse possession". If you're sure this is the case, you may still be able to get your neighbor to agree and waive adverse possession just to keep peace between you, but you'll most likely have to continue to allow the barn to stay where it is.
This is a complex issue and you should consult with an attorney. Any encroachment on your property constitutes a title defect and should be resolved before you sell or refinance your property or it passes to your heirs.
An encroachment is an infringement on someone else's rights or intrusion on another person's property. It is most often used when describing real property such as the corner of an neighbor's garage that extends over the property line or a driveway that gradually grew over the property line and is now partly on your neighbor's land. Encroachments are often caused by surveyor error in placing the pins marking the boundaries in a subdivision and the party who built their swimming pool partly on their neighbor's land was not at fault.
Typically building line are not aerial but property lines are. Your "property" should not be on your neighbors property...
The fence cannot be outside your property line.
No, you do not have the legal right to access and repair your neighbors' water line on your property without their permission. It is important to respect your neighbors' property rights and seek their consent before making any repairs.
The answer is yes your neighbors can legally pee in your pool.
It depends on local regulations, but typically trees should be planted at least 5 to 10 feet away from a property line to avoid disputes with neighbors and ensure the tree has enough space to grow properly. Always check with your local municipality for specific guidelines.
If the plants are on your property they may be planted along your neighbors fence. However, climbing plants that will grow over the fence cannot be planted along your neighbors fence. Caveat: Make sure your neighbor has not installed the fence "inside" their property line so it lies a short distance FROM the property line. That is the practice in some areas and is required by the city ordinances in some areas. In that case, the land along the fence would belong to your neighbor. You need to determine where the property line is located and not assume the fence is on the property line.
Common reasons for a gap between neighbors' fences include property line discrepancies, uneven terrain, differing fence installation methods, and lack of communication between neighbors.
"I am not so concerned with these people who are so quarrelsome." is one.
That issue is governed by local ordinances. You need to check at your town building department.
It sounds like you have a strong adverse possession/mutual acquiescence claim to the fence as the property line. You need to contact a real estate attorney immediately to preserve your right to keep the fence line as the property line. Also see the Related Questions below.
That type of issue is handled locally. You need to call your town offices and ask for the building department.