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Whether you need a permit to build or install a fence depends on several factors, including your location, the fence's height, its placement in your yard, and the materials used. In many cities and highly populated areas, a permit is required, especially for fences taller than 6 feet. Conversely, rural areas may have fewer restrictions. Typically, backyard privacy fences 6 feet or shorter do not require a permit, while front yard fences often have a lower height limit, sometimes as low as 3.5 feet. There can also be exceptions for properties in mixed residential-commercial zones. It's best to check with your local building inspection or zoning department to understand the specific requirements, height restrictions, and location rules for your area. A professional fence installer can help you navigate this process and often secure the necessary permits for you, though this may extend the project timeline.

A wobbly fence can be caused by a number of things, though poor installation is the usual culprit. It’s always best to have your fence installed by a professional who can ensure the posts are placed correctly and that the chain links have the correct amount of tension.

The most common hog wire gauge for a fence is 12.5. However, you can choose from a few gauges based on your needs. While 12.5 is a reliable gauge for penning in large, strong animals, 9 gauge is a better option of you have large animals that are easily spooked, such as horses. For smaller animals, like dogs or pigs, you can use a 16 gauge hog wire.

Ideally, when you replace a fence post, you should also replace the concrete footing. The concrete bonds to your new post, creating a secure base. If you install a new post into old concrete, it won’t be as sturdy.

That said, it is possible. Sometimes the post will lift right out of the concrete. If not, you can use a high-lift car jack to try and lift the pole out of the footing. Put the new post into the same hole and backfill it with fast-setting concrete. Keep in mind, this won’t work well for metal posts.