Building regulator maps Queensland's defect hotspots, region by region

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Kooky

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Queensland's building regulator has published a list of the structural defects it finds most often in new residential work, and the list changes from one region to the next. In a statement on Thursday 1 October, the Queensland Building and Construction Commission said roof cladding and internal wet areas head the statewide ranking, while the Gold Coast's list includes swimming pools and retaining walls and Toowoomba's includes masonry and framing.

The findings come from a mapping tool the commission calls Audit Mapper, which it uses to decide where to send inspectors. They were published to explain how the regulator works. They are also the nearest thing a buyer has to an official account of where a newer Queensland home is most likely to have a problem.

Queensland Building and Construction Commission statements of 1 October 2026 and 17 August 2026.

What the commission published

Audit Mapper draws the commission's records of defects and builder risk onto a map of the state, so that patterns show up by place. The statement describes it as a way of identifying defect hotspots and higher-risk builders, and of concentrating proactive inspections on the sites where a problem is more likely.

The commission says the tool has supported more than 4,000 proactive inspections of active construction sites. Proactive is the important word. These are visits made while a home is being built, before any owner has complained, as distinct from the inspections that follow a dispute.

The commission's chief executive and commissioner, Angelo Lambrinos, said in the statement that the tool gives inspectors "a clearer picture of what's happening and where the risks are".

The same statement carries a figure meant to keep the list in proportion: 98 per cent of residential building work in Queensland is completed without a claim on the Queensland Home Warranty Scheme, the statutory insurance that covers defective and unfinished work. Most new homes, on that measure, are built without a serious failure.

The list, region by region

The commission ranks what it calls Level 1 structural defects, the most serious category it records. Across the state as a whole, which the statement describes as Cairns to Coolangatta, five items lead. Three regional centres are then listed separately.

Roof cladding appears on every list. So, in one form or another, does water: wet areas such as bathrooms and laundries, waterproofing of external surfaces, drainage in Townsville. Mr Lambrinos drew the regional contrast himself, saying coastal areas such as the Gold Coast tend to see more pool and cladding issues while centres such as Toowoomba deal with different challenges.

The statement does not say how many defects of each kind were found, over what period, or how the rate compares with the number of homes built in each place. A region with a great deal of construction will produce more defects in total than a quiet one without building any worse. The list ranks types of defect within each area. It does not rank the areas against each other.

Why the list is useful before a purchase

A buyer of an established home in Queensland usually orders a building inspection from a licensed inspector, and the commission's own guidance for buyers names the faults such an inspection is meant to find: faulty roofs, leaking ceilings, cracked walls, damaged foundations, mould, waterproofing failures and drainage problems. The Audit Mapper list overlaps with that guidance almost item for item.

What the new statement adds is emphasis by location. Someone looking at a five-year-old house on the Gold Coast now knows the regulator sees pools and retaining walls there often enough to name them. Neither is fully covered by a standard building inspection. A pool has its own safety inspection regime, and a retaining wall of any height is a structure whose adequacy may need an engineer's opinion.

Wet areas are the hardest item on the list for a buyer to check. A waterproofing membrane sits under tiles, and a visual inspection cannot see it. Inspectors look for the signs instead: staining on the ceiling below, swollen skirting, loose tiles, a musty smell in an adjoining cupboard. A report that notes any of these in a home only a few years old is describing the defect type the regulator lists second for the state as a whole.

None of this means a newer home in a listed region is defective. It means an inspector's time, and a buyer's questions, can be pointed at the places where problems are known to cluster.

The strategy behind the tool

Audit Mapper is one piece of a wider plan. On 17 August the commission released its Compliance and Enforcement Strategy 2026-2030, which sets out how it intends to regulate for the rest of the decade.

The strategy describes three modes of work. Enable covers education and guidance to help the industry meet its obligations. Assure covers targeted inspections and risk-based audits. Enforce covers penalties, licence suspension and prosecution, applied in proportion to the conduct.

It also names eight priority areas of harm: structural and life-safety risks, unlicensed work and market integrity, financial and solvency risks, defective and incomplete work, accountability for the quality of building work, water ingress and moisture failures, plumbing and drainage compliance, and fire safety systems including passive fire protection.

Read beside the defect list, the priorities are consistent. Water ingress has its own line in the strategy and accounts for several of the entries in the table above. The strategy says the commission will rely more on digital tools and analytics to spot patterns earlier, and the October statement is an example of that in use: the commission says it will keep inspecting sites proactively and will approach builders early where the same risk keeps recurring.

Licences are the first check

The enforcement end of the strategy was illustrated two weeks earlier. On 17 September the commission reported on its prosecutions in the 2025-26 financial year. Courts imposed more than $380,000 in fines and ordered more than $157,000 in compensation, with the largest single compensation order at $70,000. The offences it listed as most common were unlicensed building work, taking excessive deposits, starting work without a compliant contract, and misuse of a licence.

The same report described a site campaign in which officers made 1,412 licence checks at 545 building sites and found 17 people doing work they were not licensed for.

For a buyer the link is practical. Work by an unlicensed person sits outside the protections that attach to licensed work, and an extension, deck or bathroom renovation is the part of an established home most likely to have been done informally. The commission keeps a public register on which a licence can be searched by name or number, and it offers a search that shows whether home warranty insurance was taken out for work at a given property. A renovation with no insurance record raises the question of who did it.

What the warranty scheme does for a later owner

The Queensland Home Warranty Scheme is compulsory for residential building work worth more than $3,300 done by a licensed contractor. According to the commission, cover runs for six years and six months from the earliest of the date the premium is paid, the date the contract is entered into or the date work starts, and it pays up to $200,000 on a claim. The cover attaches to the work, so it passes to whoever owns the home during that period.

Two consequences follow for someone buying a home that is less than seven years old. The first is that the remaining cover has a date, and it is worth knowing how much of it is left. The second is a limit the commission states plainly in its guidance for buyers: the scheme covers defects in a purchased home only if the buyer did not know about the problem before buying. A defect described in a pre-purchase report is a known defect. It can be negotiated with the seller, but it is unlikely to be a later claim.

That is the point at which the defect list and the inspection meet. The categories the regulator sees most often are the ones a buyer most needs to have looked at before the contract becomes unconditional, because finding them afterwards is the only way the warranty remains available, and finding them beforehand is the only way to price them.

How far the list can be taken

The October statement is a regulator explaining its methods, and it should be read with that in mind. It gives rankings without numbers. It covers the defects the commission has recorded, which depend on where its inspectors have been and what owners have reported. And it names three regional centres, leaving most of the state, including Brisbane, the Sunshine Coast and Cairns, inside the statewide list.

The commission says it will continue the proactive inspections and direct home owners to its Home Owner Hub for guidance on building and on the warranty scheme. It has not said whether the regional lists will be published regularly or extended to other centres. If they are, buyers and their inspectors would have something they have not had before: a local checklist written by the body that sees the failures.

Kooky, from Shaka

Kooky edits Queensland Estate and builds Shaka, the payment router he made for Queensland property professionals. One payment comes in, and every agent, agency and party in the deal receives their signed share on closing date.

About Kooky and Shaka →