Sheds & Outbuildings Cost Guide & Council Planning Rules (2026)
Pre-fabricated steel garden sheds, large custom workshops, garages, and detached home studios.
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 |
|---|---|---|---|
| Colorbond Garden Shed (Up to 10 sqm) | $110 –$180 | 20-25 yrs | Pre-fabricated modular steel sheet kit on slab or masonry anchors. |
| Portal Frame Workshop (20-40 sqm) | $220 –$360 | 40+ yrs | Structural C-purlin and portal steel frame suitable for vehicle storage. |
| Habitable Studio / Insulated Shell | $550 –$950 | 50+ yrs | Framed, insulated, and weatherproofed outbuilding ready for interior fitout. |
State & Territory Exemption Thresholds
Select your state to view development approval exemption triggers under local planning schemes.
Floor area <= 10 sqm; Height <= 2.4m; Behind front building line
Floor area <= 20 sqm (in urban zones); Height <= 3.0m
Small garden shed <= 6 sqm; Height <= 2.1m (very restricted exemption)
Floor area <= 10 sqm; Height <= 2.4m; Maximum length <= 5m
Floor area <= 15 sqm; Total height <= 2.5m; Span <= 3.0m
Floor area <= 18 sqm; Height <= 3.0m above ground
Floor area <= 10 sqm; Height <= 3.0m above ground
Floor area <= 10 sqm AND height <= 2.4m above ground
Calculate by Local Government Area (LGA)
Select your council area for interactive dimension calculators and local certifier checklists.