Stormwater engineering involves the design and management of rainwater runoff from roofs, pavements, and other impervious surfaces to prevent flooding, erosion, and water quality issues. Effective stormwater design protects infrastructure, reduces environmental damage, and ensures compliance with local council and planning standards.

Stormwater engineering services typically include detention and retention design, infiltration systems, overland flow analysis, roof and site drainage design, and water sensitive urban design (WSUD). These services help manage runoff, improve water quality, and reduce flood risk for residential, commercial, and public infrastructure projects.

Stormwater design supports development approvals by demonstrating that a project effectively manages runoff, prevents property flooding, and meets council and environmental requirements. Detailed stormwater plans and calculations are often required by local authorities before approving building and construction applications.

Stormwater detention systems temporarily hold runoff and release it slowly to reduce peak flows, while retention systems store water long‑term, often for reuse or infiltration. Both are designed to control runoff impacts, reduce downstream flooding, and protect infrastructure and the environment.

If your site has impervious surfaces such as roofs, car parks, pavements, or is within a catchment area, stormwater engineering is essential to manage runoff and minimise flooding or erosion risk. Most residential, commercial, and civil developments require stormwater plans as part of DA or construction documentation.

Stormwater engineering protects the environment by controlling runoff quantity and improving water quality, reducing sediment, pollutants, and erosion before water enters natural waterways. Techniques such as water quality treatment, infiltration, and WSUD integrate sustainable practices into site design.