Post depth for shadowbox fences should be at least two feet deep plus an additional foot for every foot of fence height above four feet. For a standard six-foot fence, this means a minimum depth of 3 feet. This depth helps to protect the structural integrity of your fence in the face of wind, soil movement, and seasonal ground shifts

Who pays for a new fence between neighbors depends on its location relative to the property line. If you build the fence entirely on your property, you are solely responsible for the costs of installation, maintenance, and repair. If the fence is built directly on the property line, both neighbors are typically responsible for the costs. In this case, it is essential to consult with your neighbor beforehand to agree on a plan for payment. While you should always inform your neighbor of your plans in advance, you generally cannot force them to contribute financially unless there are specific local laws, such as in California, where both parties might be responsible for costs unless a different agreement exists. It's a good idea to get a property line survey to know the exact boundaries before building.

All fences offer some degree of privacy, but standard perimeter fences may not be designed with that in mind. Dedicated privacy fences, however, tend to enclose smaller areas and feature more high-end materials that truly emphasize seclusion and comfort. Additionally, privacy fences typically offer fewer gaps to peek in through than standard fences, though you can likely adjust that to suit your preferences. 

You should stain both sides of your fence to get the full benefits. Fences often fall along property lines, so you may want to save a buck by leaving your neighbor’s side in the dust. If you do that, all you get is a slightly better view. Moisture and UV rays can still sneak in through the side that’s unpainted or worn down and damage your fence. Rot and rust will spread, even if you can’t see it from your side of the lawn.