Who Prepares Shop Drawings & Cost (Australia 2026)
You’ve won the package. The builder wants shop drawings for review in three weeks, your estimator assumed the fabricator would handle them, the fabricator’s quote assumed you would — and nobody has a drafter free. If that story sounds familiar, this article is the sorting-out.
Quick answer: shop drawings are prepared by (or for) the party doing the fabrication or installation — the subcontractor or fabricator — not the design consultants. The design team’s construction drawings show intent; shop drawings show exactly how your shop will build it. On Australian D&C projects, responsibility sits with the trade contractor unless the subcontract says otherwise, and most sets can be produced remotely at a fraction of local drafting rates.
For the bigger picture on what else to send offshore and what it costs, see our BIM outsourcing guide for Australian & NZ firms.
Shop drawings vs construction drawings
The distinction that trips up half the industry:
- Construction drawings (design documentation) come from the architect and engineers. They define design intent: layout, sizes, performance, specification references. They deliberately don’t tell a fabricator how to cut steel or hang duct.
- Shop drawings translate that intent into fabrication and installation instructions: exact dimensions, connection details, penetrations, hanger locations, seam positions, bolt lists, erection marks. They’re drawn from the builder’s set plus site conditions — and they get reviewed against design intent before anything is fabricated.
- As-builts close the loop after installation, recording what actually went in.
A consultant’s drawing that says “600×400 duct, route per plan” becomes, at shop level, a spool sheet with flange types, joint locations, support spacing to the SMACNA/AS standard your spec calls up, and clearances checked against the structural steel that moved 50mm since tender.
Who’s contractually on the hook
On a typical Australian D&C or construct-only project:
| Package | Who prepares shop drawings |
|---|---|
| Structural steel | Fabricator (detailing to AS/NZS 5131; often subbed to a steel detailer) |
| Mechanical / HVAC | Mechanical subcontractor |
| Hydraulics / fire | Services subcontractor |
| Electrical containment | Electrical subcontractor |
| Joinery / façade / precast | Trade contractor or their supplier |
The pattern: whoever fabricates or installs, documents. The design consultants review — they don’t produce. If your subcontract is silent on shop drawings, assume they’re yours; scope them at tender or wear the cost later.
The catch for 2026: trade contractors are exactly the firms least likely to carry in-house drafting capacity, and the local market for contract drafters is thin and expensive — see what drafting capacity really costs in Australia. Which is why shop drawings have quietly become the most outsourced documentation package in the ANZ market.
What shop drawings cost
First, a correction to how this usually gets asked: the Australian market quotes shop drawings per package (set), not per sheet. Per-sheet pricing exists but it’s mostly for one-off redline or revision work. Indicative 2026 package figures:
| Package | Typical quoted range (AUD) | Notes |
|---|---|---|
| Structural steel set (small-mid commercial) | $800-3,000+ per set | Detailing to AS/NZS 5131; connection complexity drives price |
| MEP package (per system, per building/zone) | $1,500-10,000+ per set | Duct/pipe spooling from a coordinated model is the cheaper end |
| One-off sheets / redline revisions | $55-155 per sheet | Local rush work |
| Equivalent offshore production | roughly 30-50% of local quotes | Brief-driven; model-based workflows |
Two things move the number more than sheet count: complexity (a steel connection sheet ≠ a duct layout) and whether a coordinated 3D model exists. If the builder runs a federated BIM, shop drawings cut from a coordinated model are dramatically cheaper and fight fewer site clashes — the drawing is a view of a resolved model, not a fresh negotiation with reality.
Why 90% of shop drawing work can be done remotely
Shop drawings are the textbook outsourceable package, because they meet the golden rule of outsourcing: fully describable in a written brief.
- Inputs are documents: the construction set, spec sections, survey/site dimensions, your preferred details.
- Standards are explicit: AS 1100 drafting conventions, your title block, the builder’s BIM execution plan.
- Output is verifiable: the reviewer checks against design intent, dimension by dimension.
- The 10% that isn’t remote — site measure-ups, resolving a clash that needs a sparky’s opinion at smoko — stays with your site team anyway.
The workflow that works: your site or project engineer marks up constraints, an offshore team models and cuts sheets, your senior reviews before submission. Same-day loops are realistic with a team in Vietnam’s timezone (+2-4h from AEST) — the full comparison is in local draftsman vs offshore drafting team.
How to brief a shop drawing package (so you don’t get rubbish back)
- Send the full construction set — not just “the mech drawings”; structure and architecture included, or clashes are guaranteed.
- Name the standards: AS 1100, your spec system (NATSPEC section numbers), builder’s title block and numbering.
- Define sheet scope: which levels, which systems, what scale, what schedules on-sheet.
- State the review gate: who reviews, in what format (Bluebeam/PDF mark-up, Revizto issue list), how many cycles are in the price.
- Stage the programme: first sheets early — review the first 10% hard, and the remaining 90% arrives clean.
And before any sheets are approved, run the model behind them through a structured check — our QA checklist for outsourced Revit models covers the ten-minute health check that catches most disasters.
Work with us
My Vietnam-based team produces shop drawings and the coordinated Revit models behind them for Australian and NZ trade contractors — mechanical, hydraulic, electrical containment and steel — to Australian conventions, reviewed by someone who’s coordinated MEP on WestConnex and Sunshine Coast University Hospital.
🧪 Try one package: a fixed-price test set via Fiverr — one level or one system, so you can judge the linework before the big award.
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Frequently asked questions
- What is the difference between shop drawings and construction drawings?
- Construction drawings define design intent from the architect and engineers; shop drawings translate that intent into exact fabrication and installation instructions produced by (or for) the trade contractor. Shop drawings are reviewed against the construction set before fabrication.
- Who is responsible for shop drawings on Australian projects?
- The subcontractor or fabricator doing the work, unless the subcontract allocates it elsewhere. Design consultants review shop drawings for conformance with intent but don't produce them.
- How much do shop drawings cost in Australia?
- Shop drawings are typically quoted per package, not per sheet: structural steel sets run roughly $800-3,000+, MEP packages $1,500-10,000+ depending on complexity, with offshore production at roughly 30-50% of local quotes. One-off sheets or redline revisions run $55-155 per sheet locally.
- Can shop drawings be outsourced overseas?
- Yes — shop drawings are the most commonly outsourced documentation package in the ANZ market, because the inputs, standards and outputs can all be fully defined in a written brief. Site measure-ups and final review stay local; production doesn't need to.