How to Choose a Retaining Wall Builder in Brisbane

Choosing the right builder is the most important decision in your retaining wall project. This guide covers QBCC licence verification, insurance, getting written quotes, checking references, and red flags to watch for.

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5 Steps to Choosing the Right Builder

Verify Their QBCC Licence

Every retaining wall builder in Queensland must hold a current QBCC licence for work valued over $3,300. Search the QBCC online register at qbcc.qld.gov.au to verify the licence is current and covers the class of work required. Never accept a builder who claims to be "in the process" of getting licensed.

Check Insurance Coverage

QBCC-licensed builders must carry public liability insurance (minimum $5 million) and home warranty insurance for domestic projects over $3,300. Ask to see certificates of currency. Public liability covers property damage during construction. Home warranty insurance protects you if the builder goes out of business or cannot fix defects.

Get Written Quotes (Minimum 3)

Get at least three detailed, written quotes. Each quote should itemise materials, labour, drainage, excavation, engineering fees, council approval fees, and waste removal. Compare like-for-like — ensure all quotes cover the same scope of work. Be cautious of quotes that seem too good to be true.

Check References and Past Work

Ask each builder for at least two recent references from similar retaining wall projects in Brisbane. Call the references and ask about quality of work, adherence to timeline, communication, and whether they would use the builder again. Ask to see photos of completed projects similar to yours.

Review the Contract

Before signing, ensure the contract includes: full scope of work, materials specified, start and completion dates, payment schedule (never pay more than 10% upfront for work over $20,000), warranty terms, variation process, and dispute resolution. For domestic work over $3,300, a written contract is legally required in QLD.

Red Flags to Watch For

Not all builders are equal, and some warning signs should cause you to look elsewhere. Protecting yourself starts with knowing what to avoid.

The most common issue in Brisbane is unlicensed builders offering cheap prices. While tempting, using an unlicensed builder means no statutory warranty protection, no home warranty insurance, potential legal issues when selling, and risk of substandard work that fails prematurely.

Another red flag is any builder who suggests skipping council approval or engineering certification for walls that clearly require them. A legitimate builder understands compliance requirements and builds them into their process.

Warning Signs

⚠No QBCC licence number provided upfront
⚠Demands large upfront payment (>10% for jobs >$20k)
⚠Verbal-only quotes with no written detail
⚠Will not provide recent references
⚠Quote is significantly below all others
⚠Pressures you to sign immediately
⚠Suggests skipping council approval
⚠No mention of drainage in their plan
⚠Cannot explain their engineering approach
⚠No written contract offered

Choosing a Builder FAQs

You can verify any builder's QBCC licence by searching the QBCC online licence register at qbcc.qld.gov.au. Enter the builder's name or licence number to confirm their licence is current, check what classes of work they are licensed for, and see any disciplinary history.

We recommend getting at least three written quotes from different QBCC-licensed builders. This gives you a realistic price range, helps you compare approaches and materials, and protects against overpaying. Be wary of quotes that are significantly lower than others — this often indicates corners will be cut.

A comprehensive retaining wall quote should include: itemised material costs, labour costs, excavation and site preparation, drainage system, footing details, waste removal, engineering fees (if applicable), council approval fees (if applicable), payment schedule, start and completion dates, and warranty terms.

Yes. QBCC-licensed builders must carry public liability insurance and, for domestic work over $3,300, home warranty insurance. Public liability protects you if the builder damages your property. Home warranty insurance covers you if the builder cannot complete the work or fix defects.

Red flags include: no QBCC licence number provided, requesting full payment upfront, no written quote or contract, unwillingness to provide references, significantly lower price than other quotes, pressure to sign immediately, no mention of drainage or engineering, and suggesting you skip council approval.

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