How to Build a Timber Pergola

Pergolas can be described as an outdoor structure that is made of wood posts. They have either an open roof or a covered roof. These were often used to cover walkways in 17-century Italian gardens. Today, they are used to frame a focal point of your garden.

Timber pergolas in perth have quickly become Australia’s most popular outdoor structure. They can be attached to the house or built freestanding.

You can create a relaxing, functional space that allows you to socialise and relax in the Australian summer with the right design.

Pergola Materials

Timber is the most commonly used material in such a project. The timber category can be subdivided to the different types of timber that may be used, some of which are more suitable for outdoor conditions than others.

  • For beams and posts, you can use treated softwood.
  • Hardwoods look great with older homes because they are stronger and more weather-resistant.
  • Recycled hardwood lumber is an alternative to freshly-sawn timber

Pergola Design

The basic form of a pergola is four posts with some roofing beams. However, there are many ways to give it a unique look.

Because the pergola’s dimensions are often determined by the backyard space, there is no set length or width.

Additional tips

  • Do not anchor the structure to an existing stone patio. To secure the posts, dig footings.
  • It can be dangerous to attach a pergola on a deck. Make sure you have the right plans.
  • Setbacks are required by local laws. This should be considered during the design phase.

Council Permission

Any structure built on your property must be approved by the council. You should speak with your local council as laws regarding pergola structures can vary from one area to the next.

Although regulations can vary, it is a good idea to contact the council if you have any questions.

  • Your pergola can cover more than 10 metres of floor space (depending on local laws).
  • The pergola you plan to build will have a wall enclosure that is higher than 1.4m.
  • The floor will rise 60 cm above the ground.
  • The pergola will be less than 90cm away from any adjoining property
  • The pergola will be attached to your house

Find out the local regulations by contacting your local council. You may be able redesign your pergola without the need for council approval.

Pergola Costs

Pergolas are economical to construct, but the larger and more complicated the structure, however, will increase the cost.

A pergola’s cost can vary from $1,000 to $5,000 depending on the materials used and whether the flooring is professionally installed or DIY. It also depends on contextual factors such as whether the pergola is attached or freestanding.

How to build a Pergola

This overview will cover the basics of building a pergola.

Before you dig, contact your local utility companies

  • Digging holes could cause damage to power lines or pipes.
  • Contact Dial Before You Dig, which was established in WA. Find out the phone numbers of your utility companies.
  • Ask about underground pipes and lines.

Install the Pergola Posts

  • Mark a square of the right size and measure it.
  • In the marked corners, dig postholes
  • Place stirrups in the holes or tip the posts upward
  • Make sure to support the posts and stirrups, so they are straight and level.
  • Concrete pour
  • Reduce the height of the posts’ tops to the desired height

Cross beams can be attached

  • You can cut the crossbeams according to your plans, and trim the ends
  • Be sure that the beams are level
  • Attach them to the posts

Cross beams can be covered with rafters.

  • Place the rafters parallel to the top of the cross beams
  • For more shade, you can either add more rafters or space them farther apart.
  • Attach them to the cross beams

Lattice panels

  • To create privacy or provide a grid to support climbing plants, you can add optional lattice panels along the pergola’s sides.


  • Finish your pergola with paint or stain.
  • Water-based timber treatments can give your wood a weathered look.
  • To provide more protection from the sun, attach a shade cloth
  • For shade and colour, grow a climbing plant like wisteria

Once your pergola is up, you can enjoy the beautiful and functional space it creates.

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