Shed Engineering Costs Australia
An honest, complete cost breakdown. No hidden fees, no hourly rate surprises. Here's exactly what shed engineering costs and what you get for your money.
Total Project Cost Overview
The engineering component of a shed project has several parts:
$3,200+GST
Complete structural package: drawings, shop drawings, calculations, certificate. Flat fee at Sheds.Design.
$500 – $2,000
Council or private building surveyor. Document review, inspections, final certificate.
$300 – $800
Geotechnical investigation if required. Not every site needs one.
What's Included in the $3,200+GST
Our flat fee package is comprehensive. You receive:
- Complete structural drawings (plans, elevations, cross-sections) — typically 15–25 pages
- Shop drawings — fabrication-ready details for every connection, base plate, apex bracket, and bracing element
- Member schedules — every column, rafter, purlin, girt, and brace specified with section size, steel grade, and length
- Slab/footing design — designed to AS 2870 for your site-specific soil conditions
- Structural calculations — full analysis to AS/NZS 1170 (wind and loads), AS 4100/4600 (steel), AS 2870 (footings)
- Certificate of compliance — signed by a chartered engineer, required for the building permit
- Specifications — materials, construction methods, bolt grades, steel grades, coating requirements
- Revision support — if council requests additional information or modifications, we handle it at no extra cost
What Drives the Cost
Shed Size
Larger sheds have more structural members, more connections, and more complex load paths. A 6m × 9m single-bay shed has fewer design elements than a 30m × 18m multi-bay machinery shed.
Wind Region
Sheds in cyclonic wind regions (B, C, D) require significantly heavier engineering than non-cyclonic regions (A). Cyclonic design involves higher design wind speeds, cyclonic connection categories, and additional tie-down requirements.
Purpose and Loads
A hay shed with large open bays has different engineering requirements than an enclosed workshop or a grain storage shed with significant stored loads. Crane beams, mezzanine floors, and heavy point loads all increase design complexity.
Site Conditions
Sloping sites, high terrain categories (hills, ridgelines), coastal exposure, and poor soil conditions all increase the engineering effort required.
How We Compare
| Provider | Typical Fee | Includes Shop Drawings? | Includes Slab Design? |
|---|---|---|---|
| Sheds.Design | $3,200+GST flat | Yes | Yes |
| Local structural firm | $3,000–$8,000+ | Sometimes | Usually extra |
| Online engineering services | $1,500–$4,000 | Varies | Often extra |
| Kit shed manufacturer | Included in kit price | No (frame only) | No |