The following methods can be used to stop or mitigate stormwater damage.
CONTROLLING SEEPAGE
INTERCEPT any seepage paths from springs, etc by using free draining gravels, agricultural drains and spoon drains.
ENSURE that constant groundwater flow such as that from springs, is drained to your internal stormwater system, and not discharged onto other properties.
ENSURE that your seepage flows do not drain to your sewerage system.
STORM WATER DRAINAGE
ENSURE that you allow water to flow from your neighbour's property.
ENSURE that the flow to your neighbour's property is not increased by having large paved areas without good drainage.
ALLOW water to flow naturally to your neighbour's property without concentrating it.
CHANNEL surface water around your house.
DRAIN only to the stormwater system. It is illegal to drain to the sewerage system.
FLOOD WATERS
ENSURE that the builder does not reduce the steepness of your driveway by cutting off the mound of soil between the gutter and boundary.
THE MOUND is there for a purpose, to keep flood waters on the road. When it is removed you are more likely to be flooded.
ENSURE that the floor level is well above the surrounding ground level
GRADE land away from the house on all sides.