Retrospective Certification Made Simple, Safe & Fully Compliant
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What Is Retrospective Certification?
Retrospective Certification is the process of approving structures that were built, modified, or converted without prior building approval.
Our engineers assess the current condition of your structure, identify any compliance gaps, and issue the reports and forms required to meet council and Building Code of Australia (BCA) standards.
Why You May Need Retrospective Approval
Unapproved extensions, decks, patios, sheds or carports
Conversions such as Class 10 to Class 1 dwelling upgrades
Renovations done without council sign-off
Missing engineering documentation for a sale or insurance claim
Our Retrospective Certification Services
We provide full engineering support to help you achieve compliance quickly and confidently.
Our Service Includes
Structural inspections & engineering assessments
Compliance reports for council lodgement
Identification of required modifications (if any)
Preparation of Form 15 (Design Compliance Certificate)
Issuing of Form 12 (Inspection Certificate) after adjustments or verification
Direct coordination with certifiers and council certification requirements
Our goal is to ensure your building meets all safety, durability, and structural performance standards.
What We Assess During Certification
Structural Integrity
We check all critical load-bearing elements including footings, framing, beams, columns, roof structures, and bracing systems.
Safety & Compliance
We ensure the structure satisfies requirements for wind loads, fire safety, waterproofing, and general BCA performance obligations.
Documentation
We prepare certified engineering documents required by councils, certifiers, and regulatory bodies.
Essential Certificates We Provide
Form 15 — Design Compliance Certificate
Issued before any corrective work or as part of approval documentation.
Confirms that the design work or structural solution complies with relevant Australian Standards.
Form 12 — Inspection Certificate
Issued after inspection to confirm the structure or completed rectification work is compliant and safe for occupancy.
Council Certification Support
We work directly with certifiers and local councils to ensure your application is seamless, fast, and stress-free.
Fast, Reliable Retrospective Certification for All Structures
We certify a wide range of residential, commercial, and industrial structures, including:
Renovated rooms and extensions
Carports, garages, and sheds
Patios, decks, pergolas
Dwelling conversions
Concrete and steel structures
Storm-damaged or altered buildings
What We Assess During Certification
Qualified, Registered Structural Engineers
We deliver engineering reports and certificates accepted across all QLD councils.
Fast Turnaround
Most assessments and documents are delivered within tight deadlines to support urgent approval needs.
Clear, Actionable Recommendations
We explain what needs to be fixed — and what doesn’t — so you avoid unnecessary costs.
Seamless Council Coordination
We ensure your Retrospective Certification documentation meets all council certification requirements the first time.
Get Your Retrospective Certification Started Today
Whether you’re preparing for a property sale, securing insurance, or resolving council compliance issues, our engineers make the process simple and efficient.
Contact us today to book your assessment and get fast, accurate Retrospective Certification for your structure.
Retrospective Certification & Building Performance:
What You Need to Know
This is where we explore the complexities of bringing existing buildings into compliance with current codes and performance standards. Whether you’re dealing with unapproved structures, missing documentation, or performance shortfalls, our expert articles provide practical guidance on navigating retrospective approvals and implementing effective performance strategies. Perfect for developers, property owners, and industry professionals seeking clarity and compliance in challenging scenarios.
