What Lies Beneath: What developers need to know about basements and groundwater in NSW 2026

As urban density increases across NSW, basements are becoming standard across projects of all scales – from boutique residential developments to large mixed-use projects. However, beneath many sites lies a critical and often underestimated risk: groundwater.

When groundwater intersects with basement design, projects can face unexpected approval delays, costly redesigns, additional licensing requirements and long-term waterproofing liabilities.

In this partner webinar with Dincel Structural Walling, we bring together practical hydrological, geotechnical and construction expertise to explore how developers, councils and consultants can proactively manage groundwater risk within the NSW Development Application (DA) process.

What you'll learn

  • New groundwater legislation and DA pathways in NSW

  • When specific approvals and licensing are required

  • Common regulatory triggers that cause approval delays

  • How geotechnical reporting supports smoother council assessment

  • Practical design and construction strategies to mitigate hydrostatic risk

  • Lessons learned from real-world basement case studies


Become a TUD+ Member to get unlimited access to on-demand video content, exclusive features and more. Join thousands of the industry's best and brightest today.

Want to watch the recording?

You can access this content with a free TUD account.