Do I need a permit for a deck in Victoria?
Usually yes, a building permit. Any deck attached to a house or garage needs one, whatever its size. A freestanding deck is exempt only if it is 10 m² or less, no more than 800 mm above natural ground and not attached to a building (Building Regulations 2018, Schedule 3). A planning permit is separate and only needed if an overlay or a small-lot rule applies.
Building permit: the quick test
| Your deck | Building permit? |
|---|---|
| Attached to the house, garage or another building, any size | Yes |
| Freestanding, more than 10 m² | Yes |
| Freestanding, more than 800 mm above natural ground at any point | Yes |
| Freestanding, 10 m² or less, 800 mm or lower, not attached | Usually exempt |
| Part of a swimming pool surround or barrier | Yes |
The 800 mm is measured from natural ground to the top of the decking at its highest point above the ground, so a sloping block can push one corner over the limit. Exempt decks still have to be built to the regulations.
Planning permit: when the council gets involved
- Heritage Overlay: a deck visible from the street or a public park.
- Flood overlays (LSIO, FO, SBO): a deck can change how water flows across the lot.
- Environmental or landscape overlays (ESO, SLO, VPO) where vegetation removal or visual impact is controlled.
- Small lots: in residential zones, a lot under 300 m² with a deck floor more than 800 mm above ground.
- Overlooking: raised decks close to a neighbour's windows or private open space may need screening.
How to check your lot
Enter your address in the TileMyRoom deck tool. It reads the zone and overlays for your lot from Vicmap and tells you which of the triggers above apply, then prices the deck. You can also check on VicPlan. A registered building surveyor issues the building permit, usually in two to four weeks, for about $1,500.
Want the number for your own room? The deck cost and permit check does it in 3D, free, no sign-up.
Open the deck cost and permit checkQuestions people ask
Do I need a permit for a deck in Victoria?
Usually a building permit, yes. Any deck attached to a building needs one. A freestanding deck is exempt only if it is 10 m² or less, no more than 800 mm above natural ground and not attached to a building.
What size deck can I build without a permit in Victoria?
A freestanding deck of 10 m² or less, no more than 800 mm above natural ground level and not attached to any building.
Does a deck attached to the house need a permit?
Yes. In Victoria any deck attached to a house, garage or other building needs a building permit regardless of its size.
When does a deck need a planning permit?
When the land has an overlay such as a Heritage or flood overlay, or on a residential lot under 300 m² where the deck floor is more than 800 mm above ground.
Who issues a building permit for a deck?
A registered building surveyor, usually in two to four weeks. The surveyor and permit typically cost about $1,500.
Related guides
Sources
- VBA – When is a building permit required (2018 regulations)
- Do I Need A Permit – deck rules in Victoria
- VicPlan – check zones and overlays
These are guide prices for planning, not a quote. Quantities and costs depend on the room, the products you choose and what is found once work starts. Confirm waterproofing, falls and permits against the National Construction Code, Australian Standards and your council with a licensed tradesperson or building practitioner before you buy or build.