Decks & Pergolas rules in Perth
Building a deck or pergola in Perth? City of Perth applies the Western Australia planning framework. Here's what that means locally — plus the overlays worth checking on your specific block.
Planning often not needed for low decks; a building permit usually is
Planning (development) approval is generally not needed for a house deck 500 mm or less above natural ground, or higher if it meets setback and privacy rules. A building permit, however, is required for most decks: councils commonly require one once a deck is over 500 mm high, over 20 m², or within 900 mm of a boundary.
Key rules at a glance
| Planning approval | Not needed if the deck is 500 mm or less above natural ground on a single house, or complies with setback/privacy rules if higher |
| Building permit - deck | Generally required; commonly triggered once over 500 mm high, over 20 m², or within 900 mm of a boundary |
| Patio exempt (building permit) | Freestanding, 10 m² or less, 2.4 m or less high, not in wind region C/D, 900 mm from the house, 500 mm from boundary |
| Pergola exempt | Roofless, 20 m² or less, 3 m or less high, set back at least 1 m from boundaries |
| R-Codes setback | Commonly around 1 m from side and rear boundaries (varies with R-code) |
| Privacy screens | Needed if a raised deck is within 7.5 m of a side or rear boundary |
Heritage, bushfire and flood controls on your specific lot can remove the fast-track and require a full application — even when the general rules say you're fine.
How often this applies in Perth
These are the overlays that can remove the fast-track, measured across every parcel in Perth from the same data behind our zoning map. They describe the council, not your block, and they are counted separately — one parcel can carry more than one, so they cannot be added together.
| Overlay | Share of parcels | What that means here |
|---|---|---|
| Heritage | Not mapped | No heritage mapping is published for Perth, so it cannot be ruled out here. That is not the same as the land being clear. |
| Bushfire | 3.48% | 252 parcels flagged. The rest are mapped and sit outside it. |
| Flood | Not mapped | No flood mapping is published for Perth, so it cannot be ruled out here. That is not the same as the land being clear. |
The most common zone in Perth is City centre, covering 33.0% of its 7,232 parcels. What you can build is decided by your own lot's zone, not the council's most common one.
Measured from our mapped parcel data, snapshot taken 2026-09-06. Overlays are checked live for a specific address on the address tool.
Deck or pergolas in Perth
City of Perth is the authority for Perth in Perth. The statewide Western Australia rules above set the baseline; the council can apply extra local controls, and heritage, flood or bushfire overlays on your lot can change what's allowed.
Visit City of Perth ↗ Full Western Australia rules →
See the Perth zoning map → — every parcel in Perth by zone, lot size and mapped constraints.
Frequently asked questions
Do I need council approval for a deck or pergola in Perth?
Usually yes. In Western Australia, a deck or pergola generally needs an application, and City of Perth is the authority that assesses it. See the full state rules for the pathway and what's required.
Which council approves a deck or pergola in Perth?
City of Perth is the consent authority for Perth (Perth). You can review local planning controls on the council website and lodge through your state planning portal.
Do I need approval to build a deck in WA?
A house deck 500 mm or less above natural ground usually needs no planning approval. A building permit is still required for most decks, and councils commonly require one once a deck is over 500 mm high, over 20 m², or within 900 mm of a boundary.
Sources
Related building rules
General guidance only — not professional planning advice. Local requirements in Perth can differ from the statewide summary and change over time; always confirm with City of Perth before starting work. Last reviewed: July 2026.
Talk to a town planner in Perth
This page covers the general rules. A qualified town planner can tell you what applies to your actual block — the zone, the overlays and the approval path — before you spend money on drawings.
- Qualified, practising town planners
- Advice on your property, not a generic rule
- No cost, no obligation