Anonymised QRBS case study • Sunshine Coast hinterland

When a dual-living property comes with unapproved building work.

A family purchased an extensively renovated property with detached self-contained accommodation. The available records did not demonstrate that the later work had been approved and recorded.

Building application lodgedFormal RFI issuedApproval and Form 21 outstanding

The problem discovered after purchase

The property looked complete, but its approval history was not.

The property was marketed as an extensively renovated dual-living residence with separate self-contained accommodation described as a studio. According to the family's account, they understood that the previous owner was a builder and had intended to arrange certification.

Those circumstances may have made the property appear complete in practical terms. However, occupation, appearance and marketing do not replace issued approvals, approved plans, inspection records and a final certificate.

Marketing language is not approval evidence

“Dual living,” “studio,” “cabin” and “granny flat” are not proof of the building's approved status.

The sale advertisement described the detached accommodation as a self-contained studio. The as-constructed plan set identified it as a secondary dwelling—the correct approval term for what is commonly called a granny flat.

The building's actual configuration and use can affect planning, classification, plumbing, fire-safety, energy and certification requirements. A sales description does not establish how the work is recorded in council's property records.

Documenting what already existed

The as-constructed work had to be put on paper before it could be assessed.

QRBS arranged measurement and preparation of an as-constructed plan set covering the altered and extended main dwelling, carport, covered outdoor area and detached secondary dwelling. QRBS then assembled and lodged the building-application package with an independent private certifier.

Retrospective assessment begins with the buildings and site constraints that exist today. The work cannot be moved on paper to avoid a planning benchmark, and the certifier cannot disregard an applicable constraint.

The private certifier's information request

One building application exposed four significant requirements.

Insurance and levy evidence

Provide the applicable Queensland building-insurance and portable long-service-leave levy evidence, or establish the relevant exemptions.

Side-setback referral

Obtain a council referral response because the as-constructed position appeared not to meet the relevant rural-residential side-setback benchmark.

Plumbing approval

Provide the plumbing approval for the detached additions.

Planning development approval

Obtain a separate council planning decision because the outdoor entertaining area appeared to be within a biodiversity riparian-buffer overlay.

Two different council pathways

The setback referral and planning development application address different issues.

The first process asks council to assess a departure from the applicable side-setback benchmark and provide its referral response. The second requires council planning assessment because part of the outdoor area appears within a mapped biodiversity riparian buffer.

Success in one process does not satisfy the other. Both introduce supporting information, professional and council fees and assessment time beyond a straightforward building-certification pathway.

Why the current owner carries the problem

The unresolved building history now affects the property they own.

The current owner did not perform the historical work. Even so, statements about what a previous owner intended to do, or their trade experience, do not replace verifiable statutory records.

This does not mean the earlier statements were necessarily dishonest. It means the approval pathway must be based on issued documents, evidence and the decisions of the relevant authorities.

A different kind of due diligence

A standard condition inspection may not answer the building-approval question.

A condition or pest inspection and a building-approval record investigation serve different purposes. Physical inspection can identify visible defects and deterioration within its scope, but it does not necessarily establish whether every addition, alteration or change of use has an approval and final certificate.

Purchasers should ask their conveyancing and technical advisers precisely which approval records have been searched and whether the records match what is physically present at the property.

QRBS's role

QRBS manages the owner-side evidence and approval pathway.

QRBS investigated the history, arranged the as-constructed plans, assembled the application, engaged the independent private certifier and separated the building, planning, plumbing and future final-certification requirements into manageable workstreams.

QRBS does not issue the building approval, council decision or final certificate. The private certifier, council and specialist consultants remain responsible for their respective assessments, decisions and professional work.

The verified position

This remains an ongoing approval matter.

The as-constructed plans have been prepared, the building application has been lodged and the private certifier has issued a formal information request. The two council pathways, plumbing evidence and insurance or levy treatment remain to be addressed.

No claim is made that the building application has been approved or that a Form 21—Final Inspection Certificate has been issued.

The practical lesson for purchasers

Check whether the records match the property before relying on presentation or advertising.

Questions to raise before settlement

What building work was approved before construction began?
Do the approved plans match the buildings and uses now on the land?
Were separate planning, plumbing or infrastructure approvals required?
Were mandatory inspections completed and supporting certificates supplied?
Is there a final inspection certificate for the completed work?
Is detached accommodation recorded under the correct use and classification?
Could setbacks, overlays or other site constraints affect retrospective approval?

Identifying these matters early may allow a purchaser to obtain advice, request documents, negotiate contract conditions or understand the likely approval cost before becoming responsible for the property's unresolved building history.

Dealing with unapproved work after purchase?

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Every property, contract and approval pathway is different. This case study is general information, not legal, conveyancing or building-certification advice. Purchasers should obtain advice from appropriately qualified professionals. Council, private certifiers and other authorities make their respective decisions, and previous project experience does not guarantee approval or final certification.