Decking & Patios Cost Guide & Council Planning Rules (2026)
Outdoor timber decks, composite decking systems, verandahs, pergolas, and elevated entertaining platforms.
Material Pricing & Longevity Comparison
Supply and installation brackets for common residential specifications in Australia.
| Material Option | Installed Range (per m²) | Expected Lifespan | Description & Best Application |
|---|---|---|---|
| Treated Pine Decking | $200 –$270 | 15-20 yrs | Economical light softwood timber boards. Requires bi-annual staining or painting. |
| Merbau / Kwila Hardwood | $320 –$420 | 25-30 yrs | Dense, durable red-brown hardwood with natural termite and rot resistance. |
| Native Aussie Hardwood (Spotted Gum) | $380 –$490 | 40+ yrs | High-density Australian hardwood with high BAL fire rating and distinctive grain. |
| Premium Composite (Trex / ModWood) | $420 –$580 | 25-30 yrs | Recycled timber-polymer boards. Zero splinters, no oiling, rot-proof. |
State & Territory Exemption Thresholds
Select your state to view development approval exemption triggers under local planning schemes.
Deck floor height <= 400mm above ground level; Floor area <= 10 sqm
Floor area <= 25 sqm; Finished floor height <= 1.0m above ground
Deck floor height <= 600mm above ground level; Unroofed
Floor height <= 1.0m above ground; Area <= 10 sqm unroofed
Finished floor level <= 500mm above ground level; Unroofed
Deck floor height <= 1.0m above natural ground; Area <= 18 sqm
Finished floor level <= 800mm above ground level; Floor area <= 10 sqm
Finished floor level <= 500mm above natural ground level
Calculate by Local Government Area (LGA)
Select your council area for interactive dimension calculators and local certifier checklists.