Council has conducted a Flood Mapping Study of all drainage catchments across Boroondara. The purpose of this study is to identify properties that may be affected by overland stormwater flows during a 1 in 100 year rainfall event.

While these events are rare, it is important that flood risks are understood so residents and Council can plan to reduce any potential impacts. This is particularly relevant given the more intense rainfall we have been experiencing in the last few years.

As a result of the study, properties designated at risk of flash flooding will require consent from Council for new buildings or renovation and addition works.

Discussions with property owners

In October 2017 we directly contacted the owners of properties identified as possibly affected by overland stormwater flows during a ‘1 in 100 year Average Recurrence Interval (ARI) rainfall event’. For an explanation of these terms see Definitions.

If the property you own or occupy is affected, we have notified you by letter that we intend to designate the property as subject to flood under Building Regulation 802.

Before we finalise the study, we invite you to provide feedback about your past experiences with flooding at your property. Your feedback will be considered alongside the mapping data and will be useful as we refine the final study results. Council officers will be available to discuss any specific questions or concerns you may have regarding this study and any potential impact on your property.

To provide feedback please email [email protected] or call 9278 4444.

Where anecdotal evidence is at odds with the results of the study, we will investigate and this information will be taken into consideration before the designation of properties is finalised.

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