From mid-2026, professional indemnity (PI) insurance is compulsory for all licensed building practitioners in the architect and structural engineer categories under tightened registration requirements administered by the Building Practitioners Board and Engineering New Zealand. This formalises what was previously a strong professional recommendation into a mandatory registration condition.
What Has Changed?
The Building Practitioners Board amended its licensing conditions in early 2026 to require that all licensed architects and designers maintain a minimum level of professional indemnity insurance as a condition of licence renewal. Engineering New Zealand has implemented a parallel requirement for chartered members providing structural, civil, and geotechnical engineering services where their advice directly affects the structural adequacy of buildings or infrastructure.
The minimum PI cover requirements vary by practice size but start at $500,000 per claim for sole practitioners and increase to $2M or more for larger firms. Practitioners must provide evidence of current PI cover at each annual licence renewal.
How Is PI Different from Public Liability?
This is a question many practitioners and their clients ask. The two types of cover are related but distinct:
- Professional indemnity insurance covers claims arising from errors, omissions, or negligent advice in the professional services you provide. If an architect specifies the wrong product and it causes building defects, or an engineer makes a calculation error that results in structural failure, PI responds.
- Public liability insurance covers claims for physical injury to people or property damage caused by your business activities — not the quality of your professional advice. If a client trips over your equipment at a site visit, or a faulty product you supplied causes damage, PLI responds.
Both covers are needed. They are complementary, not interchangeable.
Why the Change?
The Building Practitioners Board identified a pattern of claims, particularly in the leaky building and weathertightness space, where professional fault was established but the practitioner had no PI insurance. Claimants — often homeowners with significant remediation costs — were left without practical recovery despite winning their case. Making PI mandatory ensures that professional liability can be met from insurance when it is established.
The Implications for Public Liability Cover
The mandatory PI requirement does not reduce the need for separate public liability cover — it confirms that both are necessary. Architects and engineers visiting construction sites, attending client meetings, or supervising work face the same third-party injury and property damage risks as any other contractor. Those risks are not covered by PI insurance.
For architects and engineers operating as sole practitioners or in small firms, a combined business insurance package covering both PI and PLI is typically the most efficient and cost-effective solution. The PLI component should be at least $2M — $5M if you regularly visit commercial construction sites.
What to Check in Your Current PI Policy
- Does the policy meet the minimum limit required by the Building Practitioners Board or Engineering New Zealand for your registration category?
- Does the cover apply on a "claims made" basis (standard for PI) — and is your retroactive date early enough to cover historical work?
- Does the policy cover your specific work types, including any specialist services like heritage buildings, seismic assessment, or high-density residential?
- Is your PLI cover separate from your PI cover, and does it reflect the physical environments you work in?
Conclusion
The formalisation of mandatory PI requirements for architects and registered engineers reflects a broader trend toward greater accountability in the NZ building and construction sector. If you are a licensed professional in this space, confirm that your PI cover meets the new minimum requirements and that you also have adequate public liability cover for your physical business activities. The two covers work together to give you comprehensive protection.