Flood Information for a Property
There are a number of ways to find out about flood risks of specific areas of the Sunshine Coast.
Requesting flood information
Before building or purchasing a property, council encourages owners and potential owners of a property to submit a request for flood information to determine the property's flooding potential. You can obtain flood information search from council by submitting a property search application.
This is a search for flood information for a specific property (a fee applies). The information provided on a flood search satisfies the Building Regulations (2006) in that it declares the defined flood level, the flow velocity and the safety freeboard. For searches that are for dwellings or habitable floors, the minimum design level is also provided.
Flood levels provided on a flood information search are for the Defined Flood Event (DFE) as specified in the Sunshine Coast Planning Scheme Flood Overlay Code. This event has a 1% chance of being exceeded in any given year. The level provided on a flood information search will normally be derived from computer modelling; however in some instances where modelled levels are not available an historic flood level may be provided.
As the Sunshine Coast Planning Scheme specifies that the DFE is based upon a nominated planning period which extends to the year 2100, a flood information search will provide current climate and anticipated future climate flood levels.
Current climate flood levels are intended to inform the buying and selling of properties and are also relevant when considering flood insurance. Future climate flood levels are intended to inform the floor levels of new buildings constructed to satisfy the requirements of the Sunshine Coast Planning Scheme (2014).
Some parts of the Sunshine Coast are also declared drainage deficient. A flood information search will indicate whether the property is within a declared drainage deficient area.
Council’s MyMaps website provides the estimated extent of the Flood Hazard Area. This is terminology of the Building Regulations (2006) and is the extent of inundation of the Defined Flood Event. As the chance of this event being exceeded is 1% in any year, this event is also referred to as a Major Flood.
This mapping is currently the most appropriate guidance that Council can provide for assessing the likelihood of a major flood at a property, under current and long term future climatic conditions, from Riverine and Storm Tide sources.
This mapping information will be the most up-to-date flood information available. Council last updated this information on 3 June 2014. If you experience difficulty in viewing these maps, please contact Council's customer service centre.
The Flood Hazard Area Map contains four layers. Please select the legend icon to see the colours and descriptors of each layer. The four layers include
- CURRENT CLIMATE DEFINED FLOOD EXTENT
This Flood Extent represents the Defined Flood Event and Defined Storm Tide Events under current climatic conditions. This event has a 1% Annual Exceedance Probability (AEP). This flood extent has been derived using hydraulic flood models.
- FUTURE CLIMATE DEFINED FLOOD EXTENT
This Flood Extent represents the Defined Flood Event and Defined Storm Tide Events under future climatic conditions (year 2100). It includes assumptions of a 20% increase in rainfall intensity and 0.8m sea level rise. This event has a 1% Annual Exceedance Probability (AEP). This flood extent has been derived using hydraulic flood models.
- POSSIBLE FLOODING BEYOND MODEL BOUNDARIES
This Flood Extent represents possible flooding that may occur beyond the boundaries of the hydraulic flood models associated with the Future Climate Defined Flood Event. This information is derived at a broader scale and utilises regional scale modelling based on GIS and simple hydraulic calculation. This information is provided to indicate that flooding in these locations is possible.
- MODIFIED FLOOD EXTENT (RECENT DEVELOPMENT)
Where areas have recently been developed and earthworks have modified the extent of flooding they are labelled as Modified Flood Extent areas and are removed from the mapping. They will be re-included when new regional terrain information has been acquired.
Note about these maps
As this map reflects the Defined Flood Event as specified by the Sunshine Coast Planning Scheme Flood Overlay Code it also is the Flood Hazard Area for the purposes of the Building Regulations (2006) and QDC MP 3.5 (2013).
The absence of Flood Extent (This term is not covered in the list of definitions.) does not imply that the area is not subject to flooding; simply that an investigation may not have been undertaken in that area. This information should only be used as a guide to flooding on the Sunshine Coast. Specific local area conditions may exist that have not been represented in the underlying information, due to age or data resolution.
The Defined Flood Extent does not represent the largest possible flood that could conceivably occur; only an event that has a 1% chance of being exceeded in any given year. This event has historically been used for planning and development. Larger events are possible although improbable.
Some road locations have been shown for clarity above the Defined Flood Extent. Some of these roads may be subject to inundation.
Isolated flood free areas within the Defined Flood Extent may be constrained by accessibility and may be subject to significant durations of isolation.
Depths of inundation, velocity and flood hazard will vary within the Defined Flood Extent.
You can view a list of definitions to help understand the flood terminology used in Council's flood maps.
While every care is taken to ensure the accuracy of this product, neither Council nor the State of Queensland makes any representations or warranties about its accuracy, reliability, completeness or suitability for any particular purpose and disclaims all responsibility and all liability (including without limitation, liability in negligence) for losses, damages (including indirect or consequential damage) and costs that may occur as a result of the product being inaccurate or incomplete in any way or for any reason.
The above maps are your best source of information for flood prone land. The Sunshine Coast planning scheme also contains a flood overlay map. However, this is current at the time of preparation of the planning scheme and, due to the requirements of a planning scheme amendment process, is not readily updated with the latest flood information.
- Local advice from long-term Sunshine Coast residents may reveal personal experiences of flooding in your area.
- Professional advice from an independent, qualified engineer may provide additional and comprehensive information.
- Obtain a flood information search from Council, as per above “Requesting Information for a Property”
For more information, or if you have a query, please email