Commercial property due diligence in New Zealand has a handful of checks that determine whether the asset works. Getting them wrong is expensive and largely avoidable.
1. Seismic rating
The single most consequential check in New Zealand commercial property.
A percentage of New Building Standard expresses expected seismic performance relative to a new building on that site for that use. It is location-specific, and the reference standard changes over time — so a rating from a decade ago may not mean what an equivalent number means now.
Below 34 percent NBS and likely to collapse in a moderate earthquake, a building is earthquake-prone under the Building Act, with council notices and remediation deadlines.
Below 67 percent NBS is where the commercial consequences bite, despite having no statutory status. Institutional and government tenants commonly require 67 percent or better, insurers price differently below it, and lenders apply it in criteria.
Establish which type of assessment produced the number. An Initial Seismic Assessment is coarse screening; a Detailed Seismic Assessment involves site investigation and modelling, and it can move the figure in either direction.
2. Compliance schedule and building warrant of fitness
Where a building has specified systems — sprinklers, alarms, emergency lighting, lifts, mechanical ventilation, backflow preventers — it requires an annual building warrant of fitness supported by certificates from independently qualified people.
Check the compliance schedule matches the systems actually installed, that warrants have been issued each year, and that the supporting certificates exist.
An outdated schedule is common after a fitout added or removed systems without amendment.
3. Contamination and natural hazards
Contamination on former industrial or horticultural land triggers requirements under the national environmental standard for contaminated soil. Remediation can be project-defining, and the liability sits with the owner.
Natural hazards — flooding, land instability, coastal inundation — have received considerably more attention in district plans and in insurance underwriting following recent severe weather events. They affect insurability as much as consentability, and an uninsurable building is very difficult to finance or sell.
Check the council’s hazard overlays, not just the title.
4. The lease and the tenant
For an investment purchase, the income is the asset and the building is the wrapper.
- Term remaining and renewal rights — the weighted average lease term drives value.
- Tenant covenant — financial strength, and whether there is a guarantee. Check the Companies Office and a credit report rather than accepting the name.
- Rent review mechanism, and whether a ratchet applies.
- Outgoings recovery — what is included, whether capital costs can be recovered, whether capped. Ask for two years of actual figures.
- Assignment provisions, and whether the outgoing tenant remains liable.
- Seismic provisions — who pays for strengthening, and whether the tenant can terminate if a rating changes.
- Make good obligations at expiry.
Read the lease itself rather than a summary. Many purchases turn on a clause the buyer never saw.
The other checks
- Zoning and overlays, and what else could be done with the site if the current use ends.
- Open building consents without a code compliance certificate. These become the owner’s problem, frequently years later.
- Services capacity — wastewater, stormwater and increasingly electrical, particularly if you intend to change use or intensify.
- Access and parking, including any easements.
- Overseas investment consent if any purchaser is an overseas person — a definition that catches New Zealand-incorporated companies with sufficient offshore ownership or control.
Financing determines value
Establish lender appetite before committing. Lenders assess tenant covenant, lease term, loan-to-value and serviceability stress-tested above current rates — and some effectively decline particular building types or towns.
A property that cannot be financed on acceptable terms is worth less to you, and will be worth less to your eventual buyer for the same reason.
Note that the Reserve Bank lifted the OCR to 2.50 percent in July 2026 with a stated intention of returning inflation to the 2 percent midpoint by mid-2027, so stress-testing above current pricing is the sensible discipline.
MBIE publishes the earthquake-prone building register and seismic guidance at building.govt.nz, territorial authorities publish hazard overlays and district plans, and LINZ publishes title and overseas investment information.
General information only, not property or investment advice.
