Supervision on Residential Construction Sites

What it is

Supervision on a residential build is the daily hands on direction of work to make sure the job is built to plan, on time and without harm to the people doing it. The supervisor wears two hats. The first is contractual, making the program work. The second is legal, holding part of the work health and safety duty that flows down from the PCBU. The two hats cannot be separated. A supervisor who can deliver the schedule but cannot make the site safe is not doing the job the law expects.

In Australian residential construction the supervision role usually has two layers. The leading hand sits with the crew. A senior carpenter who runs the framing or the fit out team is the common example. The site supervisor sits above them. Normally there is one supervisor per site or one across several smaller jobs and they run the build for the licensed builder.

The legal duty of care

The supervisor carries personal duties under the model Work Health and Safety Act. Section 28 imposes a duty on workers, including supervisors, to take reasonable care for their own health and safety and to take reasonable care that their acts or omissions do not adversely affect others. The same section requires the supervisor to comply with reasonable instructions and cooperate with policies and procedures.

Where the supervisor is also an officer of the PCBU, section 27 of the model Act adds a separate duty to exercise due diligence. The due diligence duty has six elements that the Act spells out. The supervisor must keep up to date knowledge of WHS matters. They must understand the nature of the operations and hazards. They must ensure appropriate resources and processes are available. They must ensure information about incidents and hazards is received and responded to. They must ensure processes for compliance are in place. They must verify that those resources and processes are being used.

For a residential builder the practical effect is that a site supervisor with sign off authority on the program, the site safety plan and trade engagement is likely to be treated as an officer by a court. The personal due diligence duty bites.

Licensing across states

Supervision is regulated differently in each state and territory.

• In New South Wales a holder of a Qualified Supervisor Certificate is responsible for the residential work carried out under their supervision. A licensed company contracting for residential building work over $5,000 must have a nominated qualified supervisor.
• In Queensland a site supervisor licence is issued by the Queensland Building and Construction Commission to a person employed by a licensed contractor to supervise building work of equivalent scope to the contractor licence class. The supervisor must hold the required technical qualification.
• In Victoria the Victorian Building Authority registers Domestic Builders, including Domestic Builder Unlimited and Domestic Builder Limited. The registered builder remains responsible for supervision of work under their licence.
• In Western Australia, South Australia, Tasmania, the ACT and Northern Territory each regulator runs its own builder or supervisor registration system with similar themes.

A residential builder operating across borders has to track the local rule. There is no single national supervisor licence.

Adequate supervision

Adequate supervision is the legal benchmark in most builder licensing regimes. The QBCC guidance is the most explicit. The regulator assesses adequacy against the level of control the supervisor has over the work. It also considers oversight and direction by the supervisor. It looks at how many inspections happen. It looks at when those inspections happen and the quality of each one. It looks at whether the work is checked at completion before final payment.

Other state regulators apply the same principles even where the words differ. What this means in practice is that a builder cannot meet the duty by signing off remotely on work the supervisor has never seen. The supervisor must be on site often enough to verify the work in person.

Ratios

There is no single national supervisor to worker ratio for residential building work. State regulators look at adequacy in context. A two storey custom home with multiple high risk trades on site at once needs more supervisor presence than a single trade trim out. The benchmark a regulator will apply is whether the supervisor was present and active enough to control the risk on the day.

Apprentice supervision is a separate issue with stricter rules. State training authorities and apprentice supervision standards set out who can supervise an apprentice in what trade and at what stage of the apprenticeship. The electrical apprentice supervision standard in New South Wales is the most prescriptive example. The principles flow across trades. A residential builder running apprentices through their training contracts has to check the supervision rule that applies to that trade in that state.

What good supervision looks like

The behaviours of a strong site supervisor on a residential build:

• Walks the site at the start of every day and signs off the site safety plan
• Reviews the work breakdown against the program and the trade sequence before the trade arrives
• Holds a five minute pre start with each trade and signs the SWMS for high risk construction work
• Records hazards as they are identified with a control assigned and a closeout time
• Knows the names of every person on site and checks white cards on first attendance
• Documents instructions to trades in writing rather than verbally
• Escalates program slippage to the builder early rather than late
• Maintains a respectful tone with the crew and sets the line on bullying or harassment

The single biggest control a residential builder has on supervision risk is hiring well. A supervisor who has the licence, the experience and the temperament for the role is worth more than any policy document.

Where it goes wrong

Three failure modes recur. The first is the supervisor stretched across too many sites. A builder running four jobs with one supervisor is almost certainly under supervised on at least two of them. The second is the supervisor who is technically competent but cannot manage people. The site becomes a shouting match and the program suffers. The third is the supervisor with no written record of decisions. When a complaint comes the builder has no paper trail to show what was decided when. The fix in every case is structural rather than personal. Build the supervisor a job description that fits the workload and give them the templates and training to do it.