One of the most common questions Wagga Wagga homeowners have when facing foundation repair is: do I need council approval? The answer depends on what type of work is being done, the scale of the project, and the specific characteristics of your property. Getting this wrong, doing work that required approval without it, can cause serious problems when you try to sell or renovate in the future.
The Basic Framework: DA vs Exempt Development vs Complying Development
NSW planning law provides three main pathways for building work:
Development Application (DA): Formal approval from Wagga Wagga City Council, assessed against the Local Environmental Plan (LEP) and Development Control Plan (DCP). DAs take weeks to months and require formal documentation.
Complying Development Certificate (CDC): A faster approval pathway for standard development that meets pre-set criteria. Assessed by a private certifier, typically faster than a DA.
Exempt Development: No approval required. Specific types of minor work are pre-approved by State Environmental Planning Policy (SEPP) as “exempt”, meaning you can do them without any council notification or approval.
Foundation repair work can fall into any of these categories depending on its nature and scale.
What Qualifies as Exempt Development for Foundation Repair
Under the State Environmental Planning Policy (Exempt and Complying Development Codes) 2008, certain repair and maintenance work is exempt from development approval. The relevant provisions for foundation work are:
Maintenance and repair: Routine maintenance work that does not change the structural system of a building is generally exempt. This includes:
- Repointing mortar joints
- Patching concrete cracks
- Replacing a small number of stumps like-for-like (same material, same depth, same positions)
Key qualifying conditions for exempt restumping:
- The work restores the existing foundation to its original condition
- No change to structural load paths
- No change to footing depth or type
- The building is not in an area with specific overlay controls that restrict exempt development
What makes work NOT exempt:
- Installing a different type of foundation system (e.g., replacing timber stumps with steel screw piers)
- Installing foundations at a different depth than the original
- Any work to a heritage-listed property (exempt development does not apply to state or local heritage items)
- Work in a flood planning area that changes floor levels
- Underpinning (adding new structural elements to strengthen or deepen the existing foundation)
Underpinning Always Requires Approval
Underpinning, which involves adding new structural foundation elements (screw piles, mass concrete piers) to an existing building, is not exempt development. It is a structural modification to the building and requires either a CDC or DA.
In practice, most underpinning projects in Wagga Wagga are processed through the CDC pathway with a private building certifier, using:
- A structural engineer’s design
- A Construction Certificate (CC) issued by the certifier
- Construction in accordance with the engineer’s design
- A completion inspection by the engineer
- An Occupation Certificate (OC) issued by the certifier
This process is standard and well-understood by Wagga contractors and engineers who do this work regularly.
Heritage Properties: Additional Requirements
If your property is listed as a heritage item under the Wagga Wagga City Local Environmental Plan 2010, or is within a heritage conservation area, exempt development provisions do not apply. Any work, including work that would otherwise be exempt, requires heritage assessment.
For heritage properties, this means:
- Even like-for-like stump replacement may require a Section 4.55 modification or development consent
- Any change to the foundation system or material requires a formal heritage impact assessment
- The Statement of Heritage Impact must demonstrate that the proposed work does not adversely affect the heritage significance of the building
This does not mean heritage foundations cannot be repaired, it means the approval process is more involved. See our detailed guide to heritage home foundation repair in Wagga.
Flood Risk Areas
For properties in the flood planning area (as mapped in Wagga Wagga City Council’s flood studies), additional controls apply. Any development, including foundation repair, that changes the floor level of a habitable building must demonstrate compliance with the applicable flood planning level (FPL).
Restumping that raises the floor level of a flood-affected property may require a DA even if it would otherwise be exempt, because the change in floor level has flood risk implications.
Conversely, restumping that maintains or lowers the floor level in a flood risk area may be acceptable, subject to council assessment.
For North Wagga and other flood-affected areas, always check with Wagga Wagga City Council before commencing any foundation work.
How to Apply: The Process in Practice
Step 1: Determine the Approval Pathway
Based on the work type:
- Like-for-like stump replacement, non-heritage, non-flood area: likely exempt, confirm with council or certifier
- Underpinning, change of system, heritage, or flood area: CDC or DA required
Step 2: Engage a Structural Engineer (for CDC/DA)
The structural engineer prepares the design documentation. For CDC, this goes to a private certifier. For DA, this goes to council with additional planning documentation.
Step 3: Lodge the Application
CDC: Lodge with a private certifier. Timeline: typically 3-6 weeks for assessment and issue of Construction Certificate.
DA: Lodge with Wagga Wagga City Council. Timeline: 4-12 weeks depending on complexity, neighbour notification requirements, and whether heritage or flood referrals are needed. Council application fees apply (see current Wagga Wagga City Council fee schedule).
Step 4: Construction Certificate
Before work begins, the Construction Certificate (CC) must be issued. This is separate from the DA/CDC, it authorises the specific construction to begin.
Step 5: Construction and Inspections
Construction occurs in accordance with the approved design. The certifier and/or engineer carry out required inspections at specified stages.
Step 6: Occupation Certificate
After construction is complete and inspected, the Occupation Certificate is issued. This is the legal authorisation to occupy the building with the completed works.
Doing Work Without Approval: The Consequences
Carrying out foundation work that required approval without obtaining it is “unauthorised development.” The consequences can include:
- Council enforcement action requiring remediation or demolition
- Difficulty selling the property, solicitors’ searches will identify unauthorised works
- Insurance complications, insurers may use unauthorised works as grounds to deny claims
- Inability to get an occupation certificate for subsequent approved works until the unauthorised works are legitimised
Retrospective approval is possible in some cases but is more expensive and uncertain than getting it right before starting.
Frequently Asked Questions
Q: My contractor says no council approval is needed for underpinning, should I trust that? A: Be cautious. Some contractors are simply uninformed about the approval requirements. Others may be aware but prefer to avoid the delay. As the property owner, you bear the consequences of unauthorised work. Verify independently with a private certifier or council before proceeding.
Q: How much does a CDC cost for underpinning in Wagga? A: Certifier fees typically range from $1,500 to $4,000 for a residential underpinning CDC, depending on complexity. Council application fees for a DA are set by Wagga Wagga City Council’s fees and charges schedule (updated annually), typically $500 to $3,000+ depending on the cost of works.
Q: Can I do exempt restumping and call it maintenance to avoid the approval process? A: Calling underpinning “maintenance” to avoid approval requirements is not a strategy, it is a misrepresentation. If the work substantively changes the foundation system, it requires approval regardless of what it is called.
Q: My heritage house needs underpinning urgently due to structural danger, can I act immediately? A: In an emergency structural situation, Section 5 of the EP&A Act allows urgent works to make a building safe without prior development consent, provided council is notified immediately. This does not remove the need to retrospectively legitimise the work, but it provides a pathway for urgent safety action.
Q: Do I need council approval for drainage improvements near the foundation? A: Minor drainage improvements (installing agricultural drains, re-grading garden beds) are generally exempt. Installing a subsoil drainage system connected to the stormwater system may require a plumbing approval. Check with a licensed plumber and council.
Not sure whether your Wagga foundation repair project needs council approval? Contact us, we’ll advise on the approval pathway and coordinate with engineers and certifiers to get you through the process efficiently.