Stormwater Design



Stormwater is water that originates during rainfalls. In urban, developed areas, where the ground surface does not readily absorb water, this stormwater becomes surface runoff. If there is a substantial build-up in surface runoff, flooding may occur, which may cause damage to surrounding properties, including the foundations of buildings. Excess surface runoff may also carry contaminated materials, such as oil and chemical elements.


When do I need a stormwater design?

Although stormwater drainage is often at the bottom of the list when it comes to any development, good stormwater design is essential for the success of any construction project.

A good stormwater drainage design:

  • reduces the surface water saturation in the property during a rainfall, which may cause damage to structural or civil elements;
  • ensures that excess stormwater runoff is controlled; and
  • incorporates a number of filtering elements such as catch basin and sump

In addition, when lodging a new development application, councils often require a detailed stormwater design before issuing a development approval.

It is important to note that stormwater and sewer drainage are not the same. Unlike sewage, stormwater runoff is not treated.


Why Neilly Davies for Stormwater design?

Neilly Davies has been in business of stormwater design for residential, commercial and industrial developments for over 35 years. Our hydraulic engineers certify the system once it has been built, conduct a final survey of the levels and provide a stamped Work as Executed (WAE) plans for submission to council.

We liaise with your local council to adjust the design for any specific requirements. The result: A quality, innovative stormwater design solution that is appropriate, sustainable and economical.


For more information about our stormwater design services or to discuss your project in more detail, call us now 1300 730 340.

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