How Far Can You Cantilever A Pergola?

A pergola is a wonderful addition to any backyard. You can easily install it yourself or hire a professional. However, there are some questions you may ask yourself about your design before going forward with construction.

A common question many homeowners ask is how far can they cantilever a pergola?

Read further to learn more.

The answer is usually somewhere in the vicinity of 18-20 inches. 18-20 inch cantilever will look proportionate on a standard 8 feet tall pergola. If you have a taller pergola then you could extend it longer.

What Is The Maximum Span For A Cantilever Beam?

There is no definite maximum span for cantilever beams. However, it is usually limited between 2m and 2.5m which can vary depending on the variables.

  • The Material
  • The depth of the cantilever
  • The type of placement of loading from the fixed end

However, you can always increase the span of the cantilever beams one way or another:

  • Pre-Stressing
  • By increasing the depth
  • Instead of regular beams, you can try replacing them with a truss

Do You Need A Permit For A Cantilevered Pergola?

A Cantilevered pergola is considered the same as any type of pergola. Some states require permits for a pergola that has a height that goes beyond 3 meters. These restrictions vary depending on where you live, so it’s always best to check with your local council regarding the allowable height of pergolas in your area.

How To Build A Cantilevered Pergola

Many homeowners are looking to build their own Pergola, but don’t know how. The decisions of planning, designing, and building a pergola can be daunting for even the most seasoned do-it-yourselfer. But when it comes to building a cantilevered pergola you need to make sure the pergola is safe, durable, and will last.

Here is a quick video on how to build a cantilevered pergola:

Cantilevered Pergola Plan

Are you looking to add more privacy and shade to your outdoor space while maintaining your open area flexible for all your needs? This cantilevered pergola plan with an overall roof size of 14 feet by 9 feet can comfortably hold your guests and can also serve as a play area for your little ones.

You will definitely love relaxing under your low pitch single slope roof with this 2 in 12 pitch cantilever plan you can build yourself. It creates a dynamic and contemporary space to let you enjoy your outdoor space to the fullest!


In conclusion, a cantilevered pergola plan like the one above can be as simple or as complex as you make it. Keep in mind that a variety of decisions need to be made, depending on your needs. You need a foundation and appropriate footings for the size of your pergola.

The amount of support you provide underneath the beams will also depend on the weight you put on them which is usually proportional to how far you extend them from the wall.

Remember to check your local building codes about maximum span for cantilevers before proceeding with construction.