Retaining Wall and Fence Height Regulations in Victoria
Understanding the height regulations for combined retaining wall and fence structures in Victoria is essential before starting any project. The rules can be complex, as they involve both building regulations (for the retaining wall) and planning regulations (for the fence). Getting it wrong can result in enforcement action, required removal, disputes with neighbours, and wasted money. This guide explains the key council approval requirements for combined structures.
Retaining Wall Height Regulations
In Victoria, the Building Regulations set the following requirements for retaining walls:
- Walls under 1 metre in retained height generally do not require a building permit (subject to some exceptions)
- Walls 1 metre or over in retained height require a building permit from the local council
- All walls requiring a permit must be designed by a qualified structural engineer
- Construction must be carried out by a registered builder (for domestic building work)
The Victorian Building Authority (VBA) oversees compliance with these regulations. The retained height is measured from the lower finished ground level to the top of the retained soil, not the top of the wall structure.
Fence Height Regulations
Fence regulations in Victoria operate under both the Building Act and planning schemes:
- Front fences are typically limited to 1.2 metres in height under most planning schemes, though this varies by council and zone
- Side and rear fences up to 2 metres are generally permitted without a planning permit
- Fences over 2 metres may require a planning permit depending on the council area
Combined Height: The Critical Measurement
When a fence sits on top of a retaining wall, councils assess the total combined height from the lower ground level. This is where many homeowners encounter problems. For example:
- A 600mm retaining wall with a 1.8m fence creates a 2.4m structure from the low side
- A 1m retaining wall with a 1.8m fence creates a 2.8m structure from the low side
- A 1.5m retaining wall with a 1.8m fence creates a 3.3m structure from the low side
Even though a 1.8 metre fence on its own would not need a planning permit, the combined height may exceed the threshold that triggers permit requirements. Each council interprets combined height slightly differently, so checking with your specific local council is essential.
The Fences Act and Neighbour Obligations
Victoria’s Fences Act governs boundary fences between adjoining properties. Key points relevant to retaining wall and fence combinations include:
- Cost sharing neighbours are generally required to share the cost of a sufficient dividing fence
- A sufficient fence is defined as adequate for the purpose of separating the properties
- Retaining wall costs are typically borne by the owner whose land benefits from the retention, not shared equally
- The fence component on top of a retaining wall may be subject to cost-sharing under the Act
- Notice requirements must be followed before starting boundary fence work
Pool Fencing on Retaining Walls
If a retaining wall is near a swimming pool, the fence on top may need to comply with pool barrier regulations under the Building Regulations. Pool barriers have specific requirements for height, climbable objects, gaps, and self-closing gates. A retaining wall can be considered a climbable object if it provides a step-up toward the pool fence. Specialist advice is recommended for any pool fencing scenario involving retaining walls.
Common Compliance Issues
The most frequent regulatory problems with combined retaining wall and fence structures include:
- Exceeding permitted height without obtaining the required permit
- Building too close to boundaries without proper setbacks
- Failing to notify neighbours about boundary fence work
- Not obtaining a building permit for retaining walls over one metre
- Non-compliant pool barriers where the wall provides a climbable surface
How to Ensure Compliance
The best approach is to engage a licensed builder who understands both building and planning regulations in your specific council area. Request that they confirm all permit requirements before work begins. For residential retaining wall projects, your builder should handle permit applications as part of their service.
Get Compliant Professional Help
Navigating retaining wall and fence regulations can be confusing. We connect you with VBA-licensed builders across Melbourne who understand the regulatory requirements in every council area and ensure your combined wall and fence project is fully compliant. Find a builder today and take the guesswork out of compliance.
Ready to Start Your Retaining Wall Project?
Connect with licensed, insured retaining wall builders in Melbourne. Get up to 3 free, no-obligation quotes.
Find Licensed Builders