What is retrospective approval for unauthorised building works?

Retrospective approval is the process of assessing building works carried out without the required permits, or not matching approved plans, so they can be brought into compliance where possible under the Building Act.

Can unauthorised works be legalised?

Often yes, depending on the nature of the works, structural adequacy and compliance with the National Construction Code. NEBA can inspect, advise and help you pursue the correct building permit or report pathway.

Will Council always accept a building surveyor report?

Council and the relevant building surveyor assess each case on its merits. Early advice from a registered building surveyor improves the chance of a clear pathway and avoids compounding compliance issues.

Unauthorised Building Works & Retrospective Approval

Unapproved & Illegal Building Works

Discovering unauthorised building works on your property. carried out without the required permits, or not matching the approved plans. can be stressful. This situation is more common than many people realise, particularly in older properties, rural areas, and where previous owners undertook DIY work.

Common scenarios where this arises:

You’re preparing to sell and a pre-sale inspection identifies unapproved works
You’ve received a building notice or building order from your council regarding non-compliant structures.
You want to renovate and discover previous works were done without permits
A bank or insurer has flagged unapproved structures on title

What we can do

As registered building surveyors, we can inspect the works, assess them against current or applicable historic standards, and advise on the most practical pathway to compliance. In some cases, retrospective building approval can be granted, and a regularisation permit issued. In others, rectification works may be required before a permit can be granted.

Early advice matters

The worst outcomes: including building orders, demolition, or significant fines. are usually the result of inaction. Engaging a registered building surveyor early gives you the best chance of a cost-effective resolution.

Explore Our Other Services

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Mandatory Inspections

Stage-by-stage inspections to keep your project compliant.

Owner Builder Reports

Mandatory reports for owner builders looking to sell within 6.5 years of completion.

Building Permits

Residential and commercial permits issued across North East Victoria.

What happens if you ignore unauthorised works

Leaving illegal or unauthorised building works unresolved can lead to building orders, difficulty selling or refinancing, insurance problems, and in serious cases demolition or fines. Early advice from a registered building surveyor usually costs less than fixing a mess after Council becomes involved.

How NEBA helps with retrospective approval

We inspect what has been built, compare it to the National Construction Code and available drawings, and map a practical pathway. That may include a building permit for remaining or rectification works, engineering certification, or a report pathway depending on the case. Every property is different, so we will not promise an outcome before we have seen the work.

If you are buying a property with suspected unapproved works, contact us before you settle. Related reading: building permits and Section 137B owner builder reports.