News & Insights

Updates from Contrive Consultants.

February 10, 2026

Stormwater Requirements Across Regional NSW: Builder’s Guide

How stormwater and OSD requirements differ across regional NSW councils — Shoalhaven, Wagga Wagga, Dubbo, Tamworth and Albury — and how builders…

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June 13, 2023

The UPRCT OSD Handbook: Why Western Sydney Councils Use It

How the Upper Parramatta River Catchment Trust's OSD Handbook became the template for western Sydney council detention requirements.

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January 17, 2023

When Do You Need OSD in Sydney? Triggers by Development Type

New dwelling, duplex, granny flat or commercial build — when do Sydney councils require on-site detention? The common triggers explained.

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