Everyone in construction has had the moment. You look at a light fitting that needs a scissor lift and a road closure to change, or a valve buried behind a finished wall, or an access hatch you physically can’t reach, and you think: who decided to put that there?
That moment is almost always a design decision that quietly became someone else’s risk and someone else’s cost. Safety in Design (SiD) is the discipline of catching those decisions before they’re built in — while they’re still lines on a drawing and cheap to change. A good Safety in Design process should noticeably reduce the number of “who put that there” moments a structure produces over its life.
This guide explains what Safety in Design means under WHS law, what it’s actually for, and how Safeguard Business Consulting helps builders, PCBUs and developers get it done properly.
The short version
Safety in Design means eliminating or minimising health and safety risks as early as possible in the design of a structure — when changing them is easiest and cheapest. Under the Work Health and Safety Act 2011, whoever designs a structure to be used as a workplace has a legal duty to make it safe, so far as is reasonably practicable, across its entire life: construction, use, maintenance and eventual demolition. Safeguard facilitates SiD risk workshops, compiles the findings from each design discipline into a single Safety in Design report, and makes sure the residual risks are carried through into the construction risk registers and methodology rather than lost between the drawing board and the site.
What is Safety in Design?
Safety in Design is the process of identifying and controlling work health and safety risks at the design stage, before a structure is built. Instead of managing hazards once they exist on site, you design them out — or design them down — at the point where you have the most control and the lowest cost to change.
It applies the hierarchy of control at the earliest possible moment. Eliminating a hazard in a model is a redraw. Eliminating it after construction is a variation, a delay, or a permanent control that someone has to manage for the next thirty years.
What does the law actually require?
The legal obligation sits in section 22 of the Work Health and Safety Act 2011. In plain terms, a person conducting a business or undertaking that designs a structure must ensure, so far as is reasonably practicable, that the structure is designed to be without risks to the health and safety of anyone who:
- constructs or assembles it,
- uses it as a workplace for its intended purpose,
- carries out reasonably foreseeable activities at the workplace, such as maintenance or cleaning, or
- carries out its proper demolition or disposal.
A few points matter for everyone in the contracting chain, not just architects and engineers:
- It covers the whole life of the structure. The duty explicitly reaches from construction through to demolition. A design that is safe to occupy but dangerous to build, maintain or pull down does not meet it.
- The duty cannot be transferred. A designer remains the duty holder. You can’t contract or sign your way out of it.
- It applies regardless of size or budget. There is no small-project exemption. A minor commercial fit-out carries the same duty as a major civil job.
- Designers must pass on the safety information. Whoever receives the design is entitled to know its intended purpose, the results of any testing, and the conditions required to use it safely.
The obligation is supported by Safe Work Australia’s Safe Design of Structures Code of Practice and WorkSafe Queensland’s designer guidance, which set out how a reasonable designer is expected to work.
There is also an upstream point that principal contractors and developers often miss: if you commission, influence or constrain a design — through your brief, your budget, or your program — you are shaping the risk that lands on site. You have every reason to make sure Safety in Design is done well, because the residual risk becomes yours to manage.
What Safety in Design is actually for
Done properly, Safety in Design is not a document you produce to satisfy an auditor. Its purpose is to pick up the items across a structure’s life that present unusual, difficult or expensive-to-manage risks — and to deal with them while a design change is still cheap.
A simple example: lighting. A light specified without thought to access becomes a recurring confined-space or working-at-height job every time a globe fails. Change the type of fitting to one with a far longer service interval, and position it where it can be reached safely, and you have removed a lifetime of high-risk maintenance work with a single design decision. The cost to change it on the drawing is nothing. The cost to change it after handover is real, and the cost of not changing it is paid in risk, every service cycle, for the life of the building.
Multiply that across structural access, plant placement, traffic and pedestrian separation, services routing, fall protection anchor points, and demolition sequencing, and the value becomes clear. The best time to manage a risk is before it physically exists.
Why it matters to builders, PCBUs and developers
If you build, occupy or commission structures, Safety in Design is not someone else’s problem.
For principal contractors, design risks that aren’t resolved upstream arrive on site as your problem to control — usually under time pressure, often at a cost that wasn’t allowed for in the tender. A clean Safety in Design process means fewer surprises during construction and a defensible record that the risks were considered before work started.
For small business PCBUs, the duty applies to your projects too, and “we didn’t think about it at design” is not a defence. A right-sized SiD process keeps you compliant without drowning a modest job in paperwork.
For developers and project clients, the brief and budget you set shape the safety of everything that follows. Investing in Safety in Design early protects your program, your contractors and your liability position.
How Safeguard helps
Safeguard runs Safety in Design as a practical, facilitated process — not a box-ticking exercise — scaled to suit everything from civil projects through to commercial builds:
- Facilitated SiD risk workshops. We bring the design disciplines together and run a structured session that surfaces the lifecycle risks, applies the hierarchy of control, and records the decisions and the reasoning behind them.
- Consolidated Safety in Design reports. Architectural, structural, civil, services and other disciplines each see part of the picture. We compile their inputs into a single, coherent Safety in Design report so nothing falls through the gaps between them.
- Transfer to construction. This is where many SiD processes break down. We identify the residual risks that can’t be fully designed out and make sure they’re carried across into the construction risk registers, SWMS and methodology — so the people building the structure actually know about them.
- Tools and process that fit the job. We bring SiD tools and a methodology that scale to the project, rather than forcing a major-project process onto a small build, or under-doing a complex one.
The result is a Safety in Design process that genuinely reduces risk over the life of the structure — and produces far fewer “who put that there” moments down the track.
Frequently asked questions
What is Safety in Design?
Safety in Design is the process of identifying and controlling work health and safety risks at the design stage of a structure, before it is built. The aim is to eliminate or minimise risks at the point of greatest control and lowest cost — the design — rather than managing them on site after the fact.
Who is legally responsible for Safety in Design?
Under section 22 of the Work Health and Safety Act 2011, the person conducting a business or undertaking that designs a structure to be used as a workplace holds the duty. That duty cannot be transferred. Principal contractors, developers and clients who commission or influence a design also have a strong interest in it, because unresolved design risks become theirs to manage.
When should Safety in Design happen?
As early as possible — ideally from concept design — and it should continue through detailed design. The duty covers the whole life of the structure, so the assessment must consider construction, use, maintenance and eventual demolition or disposal, not just the finished, occupied building.
Does Safety in Design apply to small projects?
Yes. The duty applies regardless of the size or budget of the project. A small commercial fit-out carries the same obligation as a major civil job. The process should be scaled to suit the project, but it can’t be skipped because the job is small.
How is a Safety in Design risk assessment different from a construction risk assessment?
A Safety in Design risk assessment looks at the whole life of the structure and tries to eliminate risks at the design stage. A construction risk assessment, and the risk registers and SWMS that go with it, deal with how the builder controls the risks that remain during construction. A good SiD process feeds directly into the construction documents so residual design risks aren’t lost.
What does a Safety in Design workshop involve?
A facilitated session that brings the design disciplines together to systematically identify lifecycle hazards, apply the hierarchy of control, agree on design changes or residual controls, and record the decisions. The output is a Safety in Design report and a residual risk register that can be carried into construction.
Design out the risk before it reaches site
If your next project involves designing, building or commissioning a structure, Safety in Design is both a legal duty and one of the cheapest risk controls available — as long as it’s done early and done properly. Safeguard facilitates the workshops, compiles the report, and makes sure the risks are carried through to the people who build it. Learn more about our risk management and planning and documentation services, or talk to us about your project.
