Hiring a Retaining Wall Contractor: 10 Point Checklist
Choosing the right contractor for your retaining wall project is one of the most important decisions you will make as a Brisbane homeowner. A quality contractor delivers a wall that stands strong for decades, while the wrong choice can lead to structural failure, legal issues, and financial loss. Use this 10-point checklist to make the right call.
1. Verify QBCC Licensing
Every retaining wall contractor working on walls over 1 metre must hold a current QBCC licence. Search the QBCC licence register online to confirm the licence is valid, covers the correct trade, and has no conditions or complaints. For more detail on what to look for, read the guide to choosing a retaining wall builder.
2. Check Insurance Coverage
Ask for proof of public liability insurance (minimum $10 million) and workers’ compensation insurance. For projects over $3,300, confirm the builder provides QBCC home warranty insurance.
3. Request References and Past Work
A reputable contractor will have no hesitation providing references from recent clients and photos of completed projects. Look for work similar to your project in type, scale, and material.
4. Get Multiple Written Quotes
Obtain at least three detailed written quotes. Each quote should itemise materials, labour, drainage, engineering, and council approval costs. Be wary of quotes that are significantly lower than others — this often indicates corners will be cut.
5. Confirm Engineering Qualifications
For walls requiring engineering, ask whether the contractor works with a Registered Professional Engineer (RPEQ). Some contractors include engineering in their service while others require you to arrange it separately.
6. Ask About Council Approval
Confirm whether the contractor handles council approval applications or whether you need to manage this process yourself. Experienced contractors typically manage the entire approval process on your behalf.
7. Review the Contract Thoroughly
Never proceed without a written contract that specifies the scope of work, materials, timeline, payment schedule, and warranty terms. Queensland law requires written contracts for building work over $3,300.
8. Understand the Payment Schedule
Be cautious of contractors who demand large upfront payments. A reasonable payment schedule ties payments to completed milestones. Never pay the full amount before the work is finished and inspected.
9. Confirm Drainage Inclusions
Drainage is essential for every retaining wall. Ensure the quote explicitly includes ag pipe, drainage gravel, geotextile fabric, and connection to stormwater. If drainage is excluded, the quote is incomplete.
10. Check the Warranty
Ask what warranty the contractor provides on their workmanship and materials. This should be in addition to the statutory QBCC warranty period. Reputable builders stand behind their work with written guarantees.
Start Your Search
Finding contractors who meet all these criteria takes time, but it is worth the effort. Connect with licensed retaining wall builders in Brisbane who are ready to provide detailed quotes and demonstrate their credentials for your project.