Site Inspection Frequency NZ: What the Law Actually Requires
Most site managers assume there's a number buried in the legislation somewhere — weekly, fortnightly, monthly. There isn't. Ask WorkSafe, check the HSWA, dig through the General Risk and Workplace Management Regulations, and you'll find no prescribed cadence anywhere. So what does the law actually require, and how do you prove you're meeting it?
That's the question driving every conversation about site safe NZ site inspection frequency — and the answer has real consequences for how you structure your SSSP, how you train your supervisors, and what your inspection records need to show.
What the HSWA Actually Says About Site Inspection Frequency in Construction
Before the 7am toolbox talk on a typical Monday morning, your lead supervisor has already done a visual sweep of the site. That walk-through isn't just good practice — it's part of your legal obligation under HSWA 2015 s36, which places a primary duty of care on a PCBU to ensure the health and safety of workers and others affected by the work, so far as is reasonably practicable.
Section 30 of the same Act requires you to manage risks — identify them, assess them, control them, and monitor those controls. Monitoring is the engine that drives inspection. The General Risk and Workplace Management Regulations 2016 reinforce this but still don't put a number on it.
What the legislation does is tie your inspection frequency to risk. A single-storey fit-out with no live services and four tradespeople has a different risk profile to a multi-storey reinforced concrete frame with three subcontractors, a working tower crane, and ground penetration in progress. Your SSSP should reflect that difference — and your inspection schedule should match what your SSSP says.
The industry baseline that most PCBUs and their insurers treat as reasonable:
- Daily pre-start supervisor walk-through — not necessarily a formal document, but observable and consistent
- Weekly documented formal inspection — against a site-specific checklist, with findings recorded and actioned
- Event-triggered inspections — after significant rain or wind, after any incident or near miss, when a new high-risk activity starts, or when a new subcontractor mobilises
If WorkSafe turns up and you can't show that your inspection frequency matched your actual site risk, that's where you're exposed. Saying "we do it weekly" when you've got three concurrent high-risk activities running is not a defensible position.
What a Defensible Site Inspection Record Actually Looks Like
At the end of a formal weekly inspection, the worst thing you can do is file the checklist and walk away. The most common finding WorkSafe and SiteWise assessors pull up isn't that inspections weren't done — it's that corrective actions were never closed out.
A defensible site inspection record contains all of the following:
| Field | What it needs to show |
|---|---|
| Date and time | When the inspection occurred |
| Site and location | Specific area of the site, not just the project name |
| Inspector name and competency | Role, relevant training or certificate |
| Checklist basis | Tied to site-specific hazards from the SSSP, not a generic form |
| Findings | Hazard description, location, severity rating |
| Corrective action | What needs to happen, who owns it, due date |
| Close-out evidence | Sign-off and date when the hazard was resolved |
| Photos | Date-stamped images of the hazard and the fix |
The "tick-and-flick" failure mode is well-known. A generic checklist that asks whether PPE is available and whether emergency exits are clear, when the actual site risk is overhead power lines, mobile plant, and excavation work, tells an auditor or an investigator that your inspection process is cosmetic.
Your checklist has to be built from your SSSP's hazard register. If your SSSP identifies unprotected edges as a significant hazard and your inspection form doesn't have a specific line for edge protection status, gap.
Use this template:
ConstructionHQ Site Inspection Record — Minimum Fields
Date: ___ / ___ / ___ Site name: __ Area inspected: __ Inspector name: __ Inspector role / competency: __ SSSP version this inspection references: Rev ___
Ref Hazard from SSSP register Status Finding (if non-conformance) Action required Owner Due date Closed out (date + initials) H-01 Unprotected edges ✓ / ✗ H-02 Overhead services ✓ / ✗ H-03 Mobile plant exclusion zones ✓ / ✗ Photos attached: Y / N Inspector sign-off: ___ Next inspection due: ___ / ___ / ___
hazard register templates for construction
Event-Triggered Inspections: The Frequency That Most Sites Miss
Wednesday afternoon, heavy rain has just moved through. By Thursday morning, the scaffold on the northern elevation is still wet, the excavation on the eastern boundary has water pooling against the shoring, and a new concrete subcontractor has mobilised to start footings. Three separate triggers — one inspection isn't going to cover all three adequately.
Event-triggered inspections are the part of site inspection frequency NZ sites get wrong most often. The weekly formal inspection covers steady-state risk. It doesn't substitute for a dedicated check when site conditions change materially.
Triggers that should produce a documented inspection in their own right:
Step 1: Post-weather event — inspect any scaffold, formwork, edge protection, and excavations before work restarts. Record the specific areas checked and sign off that they're safe to use.
Step 2: Post-incident or near miss — before work resumes in the affected area, conduct a fresh inspection. Your notifiable event obligations under HSWA s56 also require you to preserve the scene until WorkSafe gives clearance, so the inspection serves a dual function.
Step 3: New high-risk activity starting — when a task classified as high-risk construction work begins (excavation, work at height, demolition, work near live services), a fresh inspection of the work area should be documented before the activity starts.
Step 4: New subcontractor mobilising — their induction isn't enough. Inspect the area they're working in before they start, so you have a baseline record of conditions on the day they arrived.
Step 5: After a WorkSafe improvement or prohibition notice — re-inspect the specific item raised in the notice before the close-out date, document your corrective action, and keep the record for at least five years.
INSPECTION TRIGGER LOG — DECISION LOGIC
Trigger event occurred?
→ Post-weather (rain / wind / storm)
→ Inspect: scaffold, formwork, excavations, edge protection
→ Document before restarting work
→ Incident or near miss
→ Preserve scene (HSWA s56)
→ Inspect affected area before resuming
→ Notify WorkSafe if notifiable event
→ New high-risk activity commencing
→ Inspect work zone day of commencement
→ Reference relevant SWMS in inspection record
→ New subcontractor on site
→ Inspect their work area on day of mobilisation
→ Cross-reference to their SWMS and induction record
→ Routine (no trigger event)
→ Weekly formal inspection minimum
→ Daily supervisor walk-through (undocumented acceptable if pattern is consistent)
Who Can Conduct a Site Inspection in NZ — and What Competency Means
Friday afternoon, the foreman hands you a stack of inspection checklists. All signed off. All clear. Then you notice every one is signed by the same labourer who's been on site for three weeks. That's a competency problem, and it's the kind of thing that unravels your whole inspection record in an investigation.
HSWA doesn't define "competent person" with a specific qualification for general site inspections, but the reasonable practicability test under s30 implies the inspector needs enough knowledge of the site's specific hazards to identify when controls aren't working. That's not a labourer on their second week.
A defensible position is that formal weekly inspections are conducted by:
- The site manager or a senior supervisor with relevant site-specific induction
- Your designated H&S advisor where one is appointed
- A Site Safe-certified person (Site Safe Passport or higher, depending on role)
For specific high-risk work — scaffolding, electrical, confined space — the competency bar is higher and tied to specific certificates and regulations. A general site inspection by a competent supervisor doesn't substitute for a scaffold inspection by a certificated scaffolder or a confined space check by a gas tester.
The practical rule: whoever signs the inspection record has to be able to explain, to an investigator, how they identified the hazards they checked and why they were satisfied that controls were adequate. If they can't do that, they weren't competent to sign it.
Frequently Asked Questions
How often does WorkSafe NZ say you must inspect a construction site?
WorkSafe does not publish a required frequency. HSWA 2015 s36 and s30 set a duty to manage and monitor risk so far as is reasonably practicable. The frequency that satisfies that duty depends on your site's risk profile. Industry practice treats a documented weekly formal inspection — plus daily supervisor walk-throughs and event-triggered inspections — as the baseline for a typical construction site.
Is weekly site inspection enough to satisfy the HSWA?
Weekly is a commonly accepted baseline, but it's not automatically sufficient. If your site has concurrent high-risk activities, multiple subcontractors, or elevated environmental exposure, more frequent formal inspections may be what's reasonably practicable. The test is whether your inspection frequency matches the hazards documented in your SSSP.
What should a site inspection record include in NZ?
At minimum: date, site and specific area inspected, inspector name and competency, a checklist tied to the site-specific hazard register from the SSSP, findings for each non-conformance, a corrective action with an assigned owner and due date, close-out evidence, and date-stamped photos. Generic checklists that don't reflect your actual site hazards are one of the most common findings in WorkSafe investigations.
Who is allowed to carry out a formal site safety inspection in NZ?
There's no single qualification mandated for general site inspections. The person conducting the inspection needs to be competent to identify whether the site's specific hazards are being controlled effectively. In practice this means a site manager, senior supervisor, or appointed H&S advisor with site-specific knowledge. High-risk work items — scaffolding, confined spaces, electrical — require inspections by persons holding the relevant certificates or licences for that specific work type.
Conclusion
Three things to take back to site from this article:
First, there is no magic number in the legislation. Your inspection frequency has to match your actual site risk, and your SSSP is the document that connects those two things. If your SSSP says weekly and your site is running five concurrent high-risk tasks, that's a gap an investigator will find.
Second, the record is only as good as the close-out. Inspections that produce findings with no corrective action sign-off are worse than useless — they document the hazard and prove you knew about it.
Third, event-triggered inspections are the part most sites skip. Post-weather, post-incident, new subcontractor, new high-risk activity — each of these should produce its own documented inspection, separate from your routine weekly check.