A dual orifice on-site detention tank uses two outlets to control discharge across both small and large storms, while a single orifice system relies on one. Dual orifice designs match predevelopment flow rates more accurately across the 20% to 1% AEP range, reduce overflow risk, and align with the Upper Parramatta River Catchment Trust Handbook…
NSW Housing Pattern Book explained. CDC vs traditional CDC, eligibility, requirements, timeline, cost, and how Torrens or strata subdivision is approved by a private certifier. Article The NSW Housing Pattern Book is a set of pre-approved housing designs. Low-rise patterns can be approved by a Complying Development Certificate (CDC) in 10 days. Mid-rise patterns use…
The NSW Pattern Book is a set of pre-approved low-rise housing designs that can move through a faster 10-day Complying Development Certificate pathway. It speeds up building approval. It does not, on its own, deliver subdivided lots or strata titles. That part still depends on a separate certification process, and most online coverage skips it.…
There is a widespread misunderstanding about how the Housing and Productivity Contribution applies to CDC duplex projects, and it is costing applicants money and causing real project delays. The short version: under the latest EP&A (Housing and Productivity Contribution) Order 2024, the HPC for a CDC dual occupancy is not captured at the subdivision stage.…
Most content comparing "private certifiers" and "council" in NSW focuses on building work. For subdivision, the question is different, and the answer depends on your project pathway, not a generic comparison between two service providers. It is also worth clearing up the terminology before anything else. A Subdivision Certifier is a person registered under the…
The NSW planning referral system has been one of the biggest hidden drags on DA timelines for years. A single referral to a state agency historically added an average of 60 days to a development application. Multiple referrals could add 100 days or more. That changes from 1 July 2026 with the launch of the…