You have to have their permission to connect to their fence. Usually, fences are constructed inside of the lot line, so there is some importance to what they choose to allow. In the best case scenario, you would have shared the cost of the first fence and connection is not an issue. If they do not agree, then you can build up to your property line, without a permanent connector.
Common Fence law refers to a law regarding fences shared by two homeowner neighbors because they are located on adjoining property.
Ask your neighbors if they care.
As long as the fence is on your property, no.
Yes, if they own the fence.
The Torkelsons - 1991 Fence Neighbors 1-1 was released on: USA: 21 September 1991
ask if he's ok with it, move the fence back, etc
The fence cannot be outside your property line.
I was raised to the fact that the owner of the fence is to mend the fence but good neighbors would often chip in with work or meterials
when building a wood fence in the town of Brookhaven what side of the fence is supposed to face my neighbors property
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.
The law requires that the best side (the side without all the wooden posts showing) be towards the neighbor. it makes no difference if they are paying half, because the law requires that the owner of the fence follow the law. in other words, the fence is on your land, and therefore, the best side must be towards the neighbor. The law protects not only the neighbor, but future buyers of your neighbor's property.
You should probably consult a local property law attorney. Whether this is allowed and what recourse you have varies considerably, dependng on the precise details of the situation and your location.