Twinside Retaining & Advanced Modular Retaining have recently merged together. For more information, please contact us on: 9302 1590

Engineered solutions at Your Service

Elevate your retaining wall project with Twinside’s specialised engineering services. Our seasoned experts provide invaluable guidance and unwavering support, ensuring your retaining walls are built to withstand the test of time. With over five decades of industry experience, we bring local knowledge and precision to every project. Whether it’s residential, commercial, or industrial, our custom-engineered solutions are tailored to meet your unique needs. Partner with us for retaining walls that exude excellence, strength, and durability.

Why choose Twinside for Engineering?

Twinside is the team some of WA’s biggest names rely on when it comes to engineering retaining walls of all sizes thanks to our 50 years of experience in the industry as well as our reputation for reliability and high quality products.


With over 50 years of experience, we intimately understand Perth’s unique geography and climate, ensuring our engineering solutions are perfectly suited to your project’s specific requirements.

Tailored Solutions

Our engineering services are highly customisable to meet the individual needs of your project, whether it’s residential, commercial, or industrial, guaranteeing a perfect fit.

Quality Assurance

We design and construct retaining walls that adhere to the highest standards, ensuring they are built to last in Western Australia’s demanding environmental conditions.

Exceptional Service

From the initial quote to the final follow-up, our team is committed to providing you with exceptional service and support throughout the engineering process, giving you peace of mind.

Our Process



We start by providing you with a standard engineering detail. We will ask you for any documents that the engineer will need, and then forward to our engineer for a quote.


Book In

The next step is to book you in for your retaining wall to be engineered and then issue the certificate.



We are here to assist you with any questions or concerns about the engineering of your new retaining wall. 

Our Products

Retaining Wall Panels

Our pre-cast concrete and limestone-look retaining wall panels combine strength and durability with outstanding good looks in a variety of colours and textures to suit residential and commercial projects.

Retaining Wall Posts

Twinside’s retaining wall posts are the hard-working backbone of our retaining walls. Choose from galvanised steel or concrete to suit the environment or aesthetic you need for your project.

We engineer retaining walls across WA

We engineer retaining walls of all sizes for residential, commercial and industrial projects across Perth and throughout a wide area of regional Western Australia as well.


Do you outsource your engineering service?

Yes, we are proudly partnered with Engenuity Engineering & Structerre Consulting.

Can you engineer for residential projects?

Yes. Our design team are more than happy to assist you to create the best possible retaining wall solution for your residential needs.

Why would I need an engineered solution?

Major commercial and industrial construction projects need retaining wall solutions tailored specifically to suit the size of the site and to meet specific design requirements of the landscape architects. However, bespoke designs are often required for residential projects where the terrain or unique geographical requirements will not be met by a standard solution.

How long will it take to engineer my bespoke retaining wall needs?

Depending on the size and difficulty of the project, our engineering service can design your project in as little as a week before you approve it. We then manufacture your retaining wall components to suit.