Underpinning Approvals
Underpinning Approvals & Certification
Support for foundation repair and building stabilisation
Underpinning is specialised work used to strengthen, stabilise or repair a building’s existing foundations. It may be needed where there has been movement, settlement, cracking, subsidence, changes to loading or planned structural alterations.
Because underpinning affects the structural integrity of a building, it requires careful planning, suitable engineering and the correct approval process. Active Building Approvals helps property owners, builders and engineers navigate underpinning approvals and certification across Queensland and Northern New South Wales.
When may underpinning be needed?
- Cracking in walls, floors or brickwork
- Signs of foundation movement or settlement
- Soil movement or unstable ground conditions
- Structural concerns identified by an engineer
- A need to strengthen foundations before renovations or extensions
- Existing footings affected by nearby construction or excavation
- Damage following water, drainage or site-condition issues
A structural engineer should assess the cause and recommend the appropriate repair or stabilisation solution. Active Building Approvals can then help identify the approval and certification requirements for the proposed work.
Our underpinning services
- Underpinning approval and certification
- Foundation repair documentation
- Building stabilisation approvals
- Review of engineering plans and supporting information
- Required inspection coordination
- Final certification documentation
- Existing underpinning work with incomplete records
What may be required?
Every underpinning project is different. Requirements may depend on the building type, structural condition, site constraints and the engineering solution proposed.
Your project may require:
- Structural engineering plans and specifications
- Site investigation or soil information
- Building approval documentation
- Construction methodology
- Inspections at key stages
- Supporting certificates from contractors or consultants
- Final inspection and certification records
We work with the property owner, builder and engineer to help ensure the correct information is
available before work begins.
Existing or unapproved underpinning work
If underpinning work has been completed without the expected approval documents or final records, it is important to understand the situation before selling, renovating or undertaking further work.
We can review available documents, identify missing information and outline the possible next steps. Depending on the project, this may involve as-constructed drawings, engineering review, inspections or additional certification support.
Our Process

Review the project
We review the engineering information, proposed scope of work and any available building records.

Identify requirements
We explain the likely approval, documentation and inspection requirements.

Assist with approvals
We help progress the required certification information and coordinate the approval pathway.

Finalise documentation
Where applicable, we support inspections and final records for the completed underpinning work.
Why choose Active Building Approvals?
- Clear guidance for complex structural projects
- Support for owners, builders and engineers
- Assistance with planned and existing underpinning work
- Responsive communication throughout the process
- Services across Queensland and Northern NSW
Need help with underpinning approvals?