South Australia’s premier earthworks & concrete construction company

Delivering projects on time, in budget and above expectations.


With over 35 years experience we have successfully delivered precision concreting on hundreds of residential & commercial projects throughout metropolitan Adelaide & the rural surrounds.


Our highly skilled team can provide excavation and earthmoving from single blocks to multi residence development sites, expertly preparing your site for footing construction.


Our fleet of trucks have the capacity to transport a variety of products, materials and equipment to and from sites for seamless project and asset management. Just let us know your requirements.








Theo Agelis Construction is a story of commitment, dedication and trust spanning over 35 years. What started as a small family business for Theo and his wife Heather, has since grown into a thriving and substantial operation.

Quickly developing an excellent reputation. Theo Agelis Construction is known for reliability, safety and satisfaction that continues to be solidified to this day with each new project.

While the workload has grown, the team has expanded, the industry has advanced and the office is no longer at home, Theo Agelis has never wavered from the original values. To deliver absolute quality with a tailored solution and personalised touch for each and every customer.

This has fostered long lasting relationships with suppliers, contractors and clients throughout South Australia.

The Theo Agelis Difference

We have the expertise and professional management of a large organisation, with the heart and values of a small business. The Theo Agelis reputation is founded upon trust, experience, reliability and project success. We maintain long lasting relationships with clients, suppliers and contractors. We care and it shows.

Our scheduling skills, problem solving, and logistical coordination can only come after years of experience. We have an extensive understanding of the industry and the local South Australian market, providing you with unrivalled expertise and value.

Each project is carefully managed, and you’ll feel relieved knowing we’re on your team as we help you deliver your building project.