Case Studies

Stormwater, flood and civil projects approved across NSW councils.

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Stuart steinle-davies 21/8/26 Stuart steinle-davies 21/8/26

OSD reduced by 30% — Dual Occupancy, Northern Beaches

Northern Beaches Council · Dual occupancy ·

Council's charts called for more detention than the site could hold. Site-specific DRAINS modelling cut the required volume by 30%. Approved.

Overland Flow & OSD — New Dwelling, Inner West

Inner West Council · New Dwelling

Council's pre-DA advice would have cut the floor plan back for an open flow channel. We argued it down, then swapped the OSD for a rainwater tank. Approved

Rainwater Reuse Sizing — New Dwelling, City of Sydney

City of Sydney · New Dwelling

No council or BASIX requirement, so the tank size was the client's call. We modelled a year of wet and dry days to get it right. Approved.