The cost to build a fence is about $3,100 on average, but you could pay anywhere from $400 to $13,700 or more. Your cost will depend on the length, height, and materials for the fence. If you hire a professional installer, labor costs typically represent about half of the total cost of the project. This means you potentially can save quite a bit of money doing the work yourself.

Most people prefer to keep the fence level by “stepping” the fence when running a horizontal fence over a slope. Stepping involves raising each panel between the posts as the fence moves over changes in slope, giving the fence line the appearance of stair steps. While this may be the preferred method of running a horizontal fence up a slope, there’s nothing wrong with installing your fence so it follows the undulations in the ground instead.

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.

Ideally, your concrete should set slightly above ground at an angle sloping away from the fence post. This will add extra support and allow water to run away from the wood fence post. Keeping water out will help prevent wood rot. Additionally, you can add soil on top of the concrete for a seamless finish.