A compliant demolition contractor in New Zealand will have clear documentation, proper site controls, and trained workers before a single wall comes down. Knowing what to look for protects you legally, financially, and — most importantly — keeps everyone safe. Here's what to check.
Understanding Who Is Responsible
Under the Health and Safety at Work Act 2015 (HSWA), everyone involved in a demolition project has duties. The contractor is the Person Conducting a Business or Undertaking (PCBU) and carries the primary responsibility for managing risks on site. As the homeowner commissioning the work, you also have duties as a PCBU — even if you're not swinging a sledgehammer. This means you should take reasonable steps to satisfy yourself that your contractor is compliant.
WorkSafe NZ is the regulator that enforces the HSWA and can issue improvement notices, prohibition notices, or prosecute non-compliant contractors.
Ask for a Site-Specific Safety Plan
Before work begins, a reputable demolition contractor should provide a Site-Specific Safety Plan (SSSP). This document outlines:
- Identified hazards and how they'll be controlled
- Emergency procedures and first aid arrangements
- Details of any subcontractors on site
- Traffic management if the work affects a road or footpath
If a contractor can't produce an SSSP or brushes off the request, treat that as a serious red flag.
Hazardous Materials: Asbestos Is the Big One
Many older NZ homes — particularly those built before the mid-1980s — contain asbestos in roofing, flooring, insulation, or wall linings. Asbestos removal is tightly regulated.
- Class A asbestos removal (friable/high-risk asbestos) must be carried out by a licensed Class A removalist.
- Class B asbestos removal (non-friable, bonded asbestos such as fibro-cement sheet) must be carried out by a licensed Class B removalist.
- Both classes require notification to WorkSafe and an asbestos removal control plan for jobs over a certain threshold — confirm the specific requirements with WorkSafe NZ.
Ask your contractor directly: Has an asbestos survey been done? Who holds the asbestos removal licence? You can verify asbestos removal licences through WorkSafe NZ. Other hazardous materials to ask about include lead paint, synthetic mineral fibres, and contaminated soil.
Building Consent and Notification Requirements
Demolition often requires a building consent from your local council. Under the NZ Building Code and the Building Act 2004, full demolition of a building generally requires consent, though some minor works may be exempt under Schedule 1. Always confirm with your council — don't rely solely on the contractor's word.
For larger demolition projects, WorkSafe must also be notified in advance if the work meets the threshold for a notifiable project (for example, work meeting certain size or duration thresholds — check the current criteria with WorkSafe NZ). Your contractor should handle this notification, but it's worth asking them to confirm it's been done. More guidance is available from MBIE Building Performance.
Site Controls You Should Be Able to See
A compliant demolition site will have visible safety measures in place. Look for:
| What to look for | Why it matters |
|---|---|
| Perimeter fencing or hoarding | Keeps the public and children out |
| Signage warning of demolition work | Legal requirement and good practice |
| Workers wearing PPE (hard hats, hi-vis, dust masks, safety boots) | Required under HSWA |
| Dust suppression (water spraying) | Controls silica and asbestos dust |
| Waste segregation on site | Hazardous waste must be disposed of correctly |
| No burning of demolition waste | Burning is generally prohibited |
If workers are on site without basic PPE or the site is wide open to the public, these are clear compliance failures.
Checking Contractor Credentials
Here's a practical checklist when vetting a demolition contractor:
- Ask for their NZBN (NZ Business Number) — confirms they're a registered business
- Request proof of public liability insurance — essential if something goes wrong
- Ask about WorkSafe licences for asbestos removal if relevant
- Check if they're a member of a trade body such as the Demolition & Asbestos Association of NZ (DAANZ)
- Ask for references from previous demolition jobs
- Confirm who the site supervisor is and their qualifications
A legitimate contractor will answer these questions without hesitation.
Waste Disposal and Environmental Compliance
Demolition generates significant waste, and disposal must comply with your local council's rules and the Resource Management Act 1994. Hazardous materials like asbestos must go to a licensed hazardous waste facility — not the general skip. Ask your contractor for a waste management plan and, if asbestos is involved, request a copy of the disposal certificate once the job is done.
When to Call a Professional
Demolition is not a DIY trade. Even partial demolition of a structure can affect load-bearing elements, hidden services (electrical, gas, plumbing), and hazardous materials. Always engage a qualified demolition contractor for anything beyond very minor removal work. If you're unsure whether your contractor is compliant, you can:
- Contact WorkSafe NZ to report concerns or ask for guidance
- Speak to your local council's building department
- Seek independent advice from a Licensed Building Practitioner via LBP
You can find qualified, local demolition contractors on tradedirectory.co.nz — look for those who are upfront about their safety systems and credentials.
SiteWise
Tōtika Prequalified
ISO 45001
