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Pergolas and similar overhead outdoor structures will typically be subject to building code regulations. Every municipality is different, and some may have specs or permit requirements, so it’s important to double-check. Some HOAs may also have restrictions on what you can build, so be sure to check with your HOA as well (if applicable).

On average, a prefabricated pergola kit takes one to four hours to build. Prefabricated pergolas are the fastest to install and could save you money, while custom pergolas can take several days to install, ranging from eight to 16 hours. The number of workers on the project can also impact how long it takes to install a pergola. 

If you need to build a concrete slab, level your property, or remove obstacles from your yard before building a pergola, then your project could take several weeks to complete.

It’s best to opt for a lightweight roof, as a heavy roof adds a lot of weight and pressure to the support posts and hardware and destabilizes the structure. Vinyl is a good, lightweight option, as is a nice open trellis, louvered aluminum or vinyl slats, or fabric panels. Clear polycarbonate is another great option that offers seamless shelter and additional UV protection without completely obscuring the sunshine. You can also choose retractable coverings or an awning that you only use in wet weather or when you need additional shade.

A concrete base—or concrete footings, more specifically—is necessary for a freestanding pergola build. A pergola is top-heavy and can’t stand on its own, so it will always need some type of base or support. If you’re attaching a pergola to a deck, the deck’s supportive joists will act as the support, so there will be no concrete base or footings necessary.