Ensure your building is safe, insurable, and code-compliant with seismic assessments by Chartered Structural Engineers. We provide Initial Seismic Assessments (ISA) and Detailed Seismic Assessments (DSA) to help meet council requirements, secure insurance, and increase property value. Whether you need to meet council requirements, satisfy insurers, or attract tenants, we provide ISA/DSA reports that are pragmatic, compliant, and ready for action.

ISA, DSA, IEP, or DEE? Let’s Break It Down

Not sure what all these seismic acronyms mean? Don’t worry — you’re not alone. Here’s a clear and simple explanation from our structural experts:

Initial Seismic Assessment (ISA)

 

An ISA gives you a quick overview of how your building is likely to perform in an earthquake. We assess factors like the building’s age, design, ground conditions, and seismic zone — and assign a %NBS rating (New Building Standard).

We follow the Initial Evaluation Procedure (IEP) guidelines — that’s the technical tool used to run this type of assessment. ISA and IEP often go hand in hand.

When to get one?
If your building is older, flagged by council, or you're looking to satisfy insurance or financing requirements.

Detailed Seismic Assessment (DSA)

 

If the ISA shows issues or if you want a deeper analysis, a DSA is the next step. This is a more detailed, data-driven assessment with site measurements, calculations, and engineering models.

It helps confirm ISA findings and provides recommendations for strengthening works if needed.

DSA includes:

  • Structural bracing analysis

  • Critical component %NBS ratings

  • Strengthening strategy

  • Upgrade cost estimates

  • MBIE & NZSEE-compliant reporting

Does Your Building Need an ISA?

According to the Ministry of Business, Innovation and Employment (MBIE), an ISA should be done by a Chartered Professional Engineer (CPEng) with relevant seismic experience.

That’s exactly what we provide — registered, experienced structural engineers who understand how to balance safety, compliance, and commercial practicality.

 

Ready for an ISA? Get Expert Help Today

Our Chartered Professional Engineers will guide you step-by-step.

Book Your Consultation Now

📄 What You’ll Receive in Your ISA Report:

  • Visual inspection summary

  • Identified structural vulnerabilities

  • Your building’s %NBS rating

  • Marked-up drawings

  • Calculation summaries

  • Practical next steps

📈 Why It Matters

Seismic assessments aren’t just about compliance — they protect your investment, reassure tenants, reduce insurance risk, and help avoid costly surprises.

Let’s make sure your building is safe, insurable, and future-ready.