Do I Need a Permit for a Retaining Wall in Victoria?
Short answer: if the wall is 1 metre or higher, yes. If it's lower, maybe. It depends on whether the wall is tied in with other building work, and whether it's protecting a neighbour's property. Planning overlays and easements can add other approvals on top.
Here's how it works in plain English, with links to the official sources so you can check for yourself.
The building permit rule
Victoria's Building Regulations 2018 list the work that doesn't need a building permit (Schedule 3). For retaining walls, the exemption covers:
"Any retaining wall less than 1 m in height that is not associated with other building work or with protection of adjoining property."
So you don't need a building permit only if all three of these are true:
- The wall is less than 1 m high (exactly 1 m doesn't count).
- It's not associated with other building work, such as a new house, extension, pool or shed.
- It's not protecting adjoining property - for example, holding up a neighbour's land or a structure near the boundary.
If any one of those isn't true, you'll generally need a building permit. Several councils spell it out the same way. Whittlesea Council, for example, says you need a permit for retaining walls "1 m or more in height" and for walls "on or near site boundaries (any height) in order to maintain the stability of the adjoining property".
Building permits in Victoria are issued by a registered building surveyor, either private or council. Cardinia Shire Council notes that it doesn't issue building permits for most projects, so you'll usually appoint a private surveyor.
Even exempt walls must be built properly
Not needing a permit doesn't mean "anything goes". The Regulations still apply to how the work is done. Under regulation 119, a council's municipal building surveyor can require an owner to build retaining walls, or take other steps to keep the soil stable. That applies if excavation or filling has affected, or may affect, the stability of the ground on that lot or next door.
In other words - if you dig out a slope and your neighbour's fence starts to lean, you can be made to fix it.
Planning permits are a separate thing
A planning permit is about land use and the planning scheme - things like overlays, vegetation and earthworks. It's separate from a building permit, and you might need one, both or neither. Cardinia Shire's "Planning vs building" page explains that if a planning permit is required, it must be approved before a building surveyor can issue a building permit.
Overlays that commonly affect landscaping in our area include:
- Bushfire Management Overlay (BMO). Common across the Dandenong Ranges and Hills, in places like Emerald, Cockatoo and Upper Beaconsfield.
- Vegetation protection and significant landscape overlays. These may control removing trees to make room for a wall.
- Erosion Management Overlay (EMO) and similar controls on earthworks. Yarra Ranges Council's "Permits you might need" page explains that the zones and overlays on your land decide which permits apply.
How to check: search your address on VicPlan (planning.vic.gov.au) and download a free Planning Property Report. It lists the zones and overlays that apply to your land, and whether it's in a designated Bushfire Prone Area.
Easements and council drains
Lots of new-estate blocks have a drainage or sewer easement along the back or side fence. That's exactly where boundary walls tend to go. Councils control what can be built over or near them:
- Cardinia Shire requires approval for any building, structure or works over an easement or within 1 m of a council stormwater drain. It lists a retaining wall running parallel to an easement as likely to be approved, and a wall crossing an easement as likely to be approved subject to a Section 173 agreement.
- City of Casey has its own Building Over Easements guidelines covering works over easements or within 1.0 m of a council asset.
If you're in a new estate in Officer, Pakenham or Clyde, check your title plan for easements before you plan a boundary wall.
Talk to your neighbour
A boundary wall affects both sides. Cardinia Shire suggests talking to neighbours early and checking permit requirements, so you avoid disputes and costly changes later. That's good advice.
A quick checklist
- How high will the wall be? If it's 1 m or more, plan for a building permit and engineering.
- Is it part of other building work (house, pool, shed, extension)? If so, it needs a building permit whatever its height, often as part of that project's permit.
- Is it holding up a neighbour's land or protecting their property? Then it needs a permit at any height. Walls on or near a boundary can also run into siting or easement rules.
- Any overlays? Get your free VicPlan property report.
- Any easements? Check your title plan and ask council about build-over approval.
- Still unsure? Ask a registered building surveyor. It's what they do.
Talk to us
Walls 1 m or higher need a building permit, and the building surveyor will usually ask for an engineer's design. If you're not sure what your wall needs, get in touch and we can talk it through. For anything that does need a permit, a registered building surveyor can tell you exactly what's required.
Learn more on our retaining walls page, read our cost guide, browse the gallery or check our services.
Planning a wall? Book a free on-site quote and we'll come out, have a look and go through everything with you.
Sources (accessed 1 October 2026)
- Building Regulations 2018 (Vic), Schedule 3, Exemptions from building permits (retaining wall item). AustLII.
- Building Regulations 2018 (Vic), regulation 23, Exemptions from building permits. AustLII.
- Building Regulations 2018 (Vic), regulation 119, Retaining walls. AustLII.
- Cardinia Shire Council, "Building permits and approvals".
- Cardinia Shire Council, "Planning vs building".
- Cardinia Shire Council, "Development Engineering and landscape: permits and payments" (Apply to build over an easement).
- Cardinia Shire Council, "Infrastructure, works and asset protection".
- City of Casey, "Building Over Easements / Council Stormwater Drainage Guidelines".
- Yarra Ranges Council, "Permits you might need".
- City of Whittlesea, "When you need a building permit".
- Victorian Government, "Using VicPlan" and "Planning property report".
- Building and Plumbing Commission (formerly VBA).
General information only, not legal or building-surveying advice. Always confirm with a registered building surveyor and your council.
