This factsheet outlines the benefits, design criteria and factors of infill stormwater quantity management in multi-dwelling developments.
Design Scale: Street
Development that increases the proportion of land that is covered by roof and/or hardstand areas also increases the amount of runoff.
Increased runoff from higher density infill developments can create issues on and off site, including flooding, erosion, property damage, and reduced water quality.
Suitable stormwater management for strata and multi-dwelling developments is dependent on the capacity of local drainage systems, groundwater levels, and soil characteristics.
Improved outcomes can be achieved where infiltration devices incorporate vegetated assets such as tree pits, roof gardens, and biofilters.
Consultation with Local Government is required for all infill developments. This will determine the extent of on-lot or in-road reserve retention/detention that is required or establish the extent of local drainage system upgrades required to accommodate any runoff increases.
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