Australia's diverse coastlines are subject to constant change due to natural processes and human activity. From erosion to rising sea levels, protecting coastal properties has become a critical concern for homeowners, developers, and businesses. Building seawalls in Australia can be part of the solution, however they are just one piece of the puzzle in coastal resilience puzzle.
At International Coastal Management (ICM), we specialise in guiding property owners, councils and developers through the complexities of coastal protection. From navigating local regulations to designing and implementing tailored solutions, we ensure your coastline is protected while balancing environmental sustainability.

Understanding Coastal Protection in Australia
Coastal protection projects in Australia often require rigorous approvals and compliance with strict regulations. If your property or development falls within a coastal protection (erosion-prone) overlay, councils may request an engineering report certified by a Registered Professional Engineer with coastal engineering experience - even if erosion risk is deemed minimal.
How ICM Helps You Navigate Coastal Protection
At ICM, we understand the complexities of coastal approvals and work closely with property owners, developers, and councils to ensure compliance. Our services include:
Regulatory Guidance: Interpreting and addressing council requirements under coastal protection overlays, planning schemes, and erosion risk assessments.
Permit Applications & Compliance Reports: Preparing engineering reports, RPEQ-certified assessments, and design justifications that satisfy council and regulatory requirements.
Seawall & Coastal Structure Design: Providing tailored solutions for seawalls, revetments, dunes, and nature-based coastal defences that enhance resilience.
Construction and Monitoring: Overseeing project implementation and ensuring long-term success.
With decades of experience in seawall design, approvals, and compliance across Australia’s coastline, ICM, an experienced coastal engineering company, ensures your project meets all necessary regulations efficiently and cost-effectively.
Need an RPEQ Certified Coastal Engineering Report?
If your council has requested an RPEQ certified report for your seawall or coastal development project, we can help. Our team includes RPEQ-certified and Chartered Engineers with extensive experience in coastal hazard assessments, seawall design, and erosion risk mitigation. We provide comprehensive reports that meet council requirements, ensuring your project gains the necessary approvals while delivering long-term resilience. Contact us today for expert guidance and tailored engineering solutions.
Are Seawalls the Right Solution?
Seawalls are one method for protecting properties from erosion and wave action. Typically constructed from boulders, concrete, or other durable materials, they serve as a barrier to safeguard beachfront infrastructure. However, seawalls alone may not address the root causes of coastal erosion, and they come with their own set of advantages and disadvantages.
At ICM, we approach coastal protection holistically, considering all three elements of the Coastal Resilience Framework:
Top of Beach: Managing dunes and vegetation to stabilise the shoreline.
Bottom of Beach: Enhancing nearshore zones to dissipate wave energy.
Sediment Supply: Ensuring a balanced flow of sand to sustain beach health.
By evaluating these factors, we ensure that a seawall in Australia is part of an integrated solution tailored to the specific needs of your site.

Types of Seawalls
Seawalls come in a variety of forms, with their design tailored to the specific needs of the coastline they protect. Materials can range from rock and boulders, which provide a natural and cost-effective barrier, to concrete and modular designs, often used for their durability and adaptability. Living seawalls are an innovative option, incorporating features that can support marine life habitat while offering coastal protection. Geotextile container seawalls, made from durable fabric filled with sand or other materials, are a flexible alternative suitable for temporary or less-impacted areas.
Seawalls also differ in shape, influencing their effectiveness and interaction with wave energy. Sloped seawalls dissipate wave energy gradually, reducing impact forces, while vertical walls reflect wave energy but may increase turbulence. Curved or stepped seawalls are designed to deflect waves upward or break their energy in stages, offering additional protection while potentially enhancing aesthetics. The choice of seawall type depends on site-specific conditions, including wave dynamics, environmental considerations, and budgetary constraints.
Enhancing Seawalls with Dunes and Living Elements
In many cases, seawalls work best when combined with other coastal resilience measures. For example, Gold Coast seawalls incorporate vegetated dunes on top of them, to provide an additional layer of protection by helping to trap sand, reduce wind erosion, and absorb wave energy. Similarly, living elements like oyster reefs or seagrass beds can enhance biodiversity while contributing to coastal stability.
Our team at ICM designs solutions that work with natural processes, creating sustainable outcomes that benefit both communities and the environment.

When to Consider Coastal Protection
If you're noticing signs of erosion or instability on your property, it’s crucial to act quickly. Warning signs include:
Retreating shorelines.
Visible cracks or damage to existing seawalls.
Increased exposure of dunes or vegetation to wave action.
Accelerated loss of beach sand.
Early intervention can save significant costs and prevent further damage. Contact ICM for a site-specific analysis and recommendations for your project.
Building Coastal Resilience for the Future
Protecting Australia's coastlines requires more than just hard structures like seawalls. By integrating solutions that address the top of the beach, bottom of the beach, and sediment supply, we create systems that are adaptive, sustainable, and resilient.
At ICM, we believe in working with natural processes to protect your property while preserving the beauty and biodiversity of Australia's iconic coastlines.
Ready to Protect Your Coastal Property?
Whether you're a private homeowner or a developer, coastal protection can feel overwhelming. ICM is here to simplify the process and deliver results you can trust. Contact us today to discuss your coastal challenges and explore tailored solutions for your property.