Can I get a retrospective approval?

A retrospective approval is when you seek formal building approval after construction has already taken place, typically because work was done without the required permits or certificates. While it’s sometimes possible to legalise unapproved work, the process is complex, costly, and not guaranteed to succeed.

Why Retrospective Approvals Are Risky

Legal uncertainty: Councils or certifiers are not obligated to approve completed work. If it doesn’t meet current standards or planning conditions, you may be forced to modify or demolish it.

Engineering assessments: You’ll likely need a qualified engineer or building surveyor to inspect the structure and certify that it’s safe and compliant. This can involve invasive testing, destructive sampling, or redesign.

Costly rectifications: If the work doesn’t meet the National Construction Code (NCC), you may need to retrofit fire safety systems, waterproofing, structural supports, or accessibility features, often at significant expense.

Penalties and fees: Councils may impose fines for unauthorised work, and you’ll still need to pay full application fees for retrospective approval. In some cases, additional levies or legal costs may apply.

Insurance and resale risks: Unapproved work can void your building insurance and complicate future property sales. Buyers and lenders often require proof of compliance.

What You’ll Need to Provide

To apply for retrospective approval, you’ll typically need:

• Detailed as-built drawings of the completed work

• Engineering reports confirming structural integrity

• Compliance certificates from licensed trades (if available)

• Evidence that planning conditions have been met

• A building certifier willing to assess and approve the work

Your certifier will review all documentation and may require additional inspections or modifications before issuing a certificate.

MBH Recommendation: Always obtain approvals before starting construction. Retrospective approval should be a last resort. It’s unpredictable, expensive, and can lead to legal complications. If you’ve already built without approval, contact a certifier or council immediately to understand your options.