
What Builders Often Miss Before Breaking Ground
Every developer knows time is money but nothing delays a project like unexpected contamination. Across the Central Coast, councils now require a Preliminary Site Investigation (PSI) before granting development approvals.
It’s not just red tape. A PSI ensures your block of land doesn’t carry hidden contamination from previous industrial use, old waste disposal, or nearby fuel storage. Missing this step can mean expensive remediation, redesigns, and months of delay.

1. It’s a Legal Requirement and Councils Enforce It
Central Coast Council follows the NSW EPA’s Contaminated Land Management Guidelines, which require a PSI for any site where land use may have changed like from industrial to residential.
Skipping it? Your development application (DA) may be rejected or paused until a compliant PSI report is submitted.
That means you’re not just delaying construction you’re adding cost to every idle day your project sits waiting for approval.
2. It Protects Your Project Value
Undiscovered contamination can trigger serious remediation costs or worse, downgrade your property’s marketability.
A PSI gives developers peace of mind by assessing soil, groundwater, and historical land use to identify any environmental risk before construction begins.
At Assessment Corp, our experienced environmental engineers prepare PSI reports that meet council standards and are easy to understand: no jargon, no hidden details, just clear guidance to move your project forward.


3. You Avoid Future Liability
When a site turns out to be contaminated post-development, responsibility falls back on the developer.
By completing a PSI, you demonstrate due diligence, protecting yourself and your clients from costly disputes or compliance penalties later on.
Our Preliminary Site Investigations combine desktop reviews, historical land-use research, and on-site sampling when needed all aligned with SEPP (Resilience and Hazards) 2021 and NSW EPA standards.
Fast-Track Council Approval with the Right Partner
Assessment Corp works directly with builders and developers to streamline the PSI process.
We deliver reports that tick every box for Central Coast councils and more importantly, help you build with confidence from day one.



