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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.

The ideal spacing for four-by-four residential fence posts is usually about 6 to 8 feet between posts. However, if the fence is particularly high or you live in a very windy region, you might want to space them closer together for better stability. A fence pro can help you decide on your post spacing. 

It’s usually cheaper to buy pre-made fence panels than to build your own. This surprises many people since DIY tasks so often save money. However, large stores don’t have to pay the same amount per board of wood that homeowners do, allowing them to sell pre-made panels at a more cost-effective rate. Pre-made panels also save a great deal of time, energy, and guesswork. The drawback is that they are harder to customize to the shape and slope of your yard.

A high-quality wrought iron fence is one of the most durable options available and can last a lifetime, or even centuries, with proper care. However, wrought iron is susceptible to rust and corrosion if not maintained.

To maximize its lifespan, regular maintenance is required. This includes:

• Cleaning the fence with soapy water every six months.

• Scrubbing away any rust or corrosion as soon as it appears.

• Applying a new coat of paint or refinishing the fence every few years to protect the metal from moisture and oxygen. The recommended frequency varies, with sources suggesting anywhere from every 1 to 10 years.

If significant rust develops, it's wise to hire a professional fence repair company to clean the rust and reseal the fence. The cost to refinish a fence is typically between $5 and $12 per square foot, a worthwhile investment to ensure its longevity.