Retaining Walls Southern Highlands

  • 25+ Years of Experience
  • Family-Owned & Operated
  • Reliable, Quality Workmanship

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A Stone Wall is Surrounded by Trees and Gravel in a Garden — Simon Dickson Excavations in Moss Vale, NSW

Southern Highlands Retaining Walls

When it comes to sloped properties, soil control, or landscaping with structure, retaining walls aren’t just helpful—they’re essential. At Simon Dickson Excavations, we build strong, functional retaining walls across the Southern Highlands that are made to last. Whether you're looking to prevent erosion, create level ground, or define your outdoor space, we tailor each build to suit your site and needs.


We’ve been shaping land in this region for decades, and we know how to manage local soil types, slope challenges, and drainage issues. From small garden walls to large structural solutions, we excavate, level, and build with precision. We work with a variety of materials and ensure every wall is as reliable as it is practical.


Call 0412 929 892 for advice or a quote—we’ll help you design a retaining wall that actually works.

Shaping Slopes Into Safe, Usable Spaces

A retaining wall isn’t just a boundary—it’s a support system. We build walls to protect structures, stabilise hillsides, and improve usability across your property.


Whether you’re preparing for a build, reworking your yard, or managing land movement, our walls provide structure, support, and peace of mind. We handle all the excavation and prep, ensuring proper compaction, drainage, and material selection.


We also collaborate with landscapers, builders, and homeowners to make sure the wall’s finish suits your overall design. No matter the scale, we approach every project with the same goal: deliver a tough, long-lasting result that makes your property safer and more functional.


Building with local conditions in mind and using the right tools and know-how to get it done right.

A Stone Wall is Surrounded by Trees and Bushes on a Sidewalk — Simon Dickson Excavations in Moss Vale, NSW

Frequently Asked Questions

  • Do retaining walls require council approval or engineering?

    Yes, in many areas retaining walls over 600mm high—or those near boundaries or structures—require engineering and council approval. This is to ensure safety, proper drainage, and structural stability. Always check local regulations before building to avoid future issues or compliance breaches.

  • What materials are best for a retaining wall?

    Common materials include concrete blocks, treated timber, stone, and reinforced concrete sleepers. The best option depends on site conditions, wall height, budget, and desired appearance. Each material has its pros and cons—some are better for large-scale stability, while others suit aesthetic or space-limited applications.

  • How do you manage drainage behind a retaining wall?

    Drainage is critical. Poor drainage leads to pressure build-up behind the wall, causing damage or collapse. A proper system includes gravel backfill, drainage pipes (ag pipe), and weep holes to allow water to escape. Correct compaction and site slope also play a major role in long-term success.