A pre-purchase building inspection is a visual assessment of a property's condition, carried out by a qualified inspector before you commit to buying. It's usually one of the conditions in a sale and purchase agreement, and it's worth understanding what it actually covers before you're relying on it to make a decision.

What a standard inspection covers

Most inspections carried out to the New Zealand standard (NZS 4306) assess the condition of:

  • The roof, roof space and guttering, checked for leaks, wear and ventilation
  • Exterior cladding, joinery and paint condition
  • Subfloor space, foundations and any visible moisture or drainage issues
  • Interior linings, for visible signs of damp, movement or damage
  • Moisture readings taken at points the inspector considers at risk
  • Visible plumbing, and the general condition of decks, fences and outbuildings

You get a written report rating the condition of each area, with photos, and usually a summary of the most significant issues found.

Sponsored

What it deliberately doesn't cover

A standard pre-purchase inspection is non-invasive — the inspector isn't cutting into walls, lifting flooring, or moving furniture and stored items to see what's behind them. That means it can miss things a more invasive test would catch. It's also not a specialist assessment: it won't include a full electrical certificate of compliance, a detailed engineering report on foundations, or a specific test for materials like asbestos or methamphetamine contamination unless you've separately arranged one. If the property or the inspector's initial look raises a specific concern, that's usually the point where a specialist report gets ordered on top of the standard one.

How to actually read the report

Every older home has some issues — the useful question isn't "does this report list problems" but "how serious are they, and what would fixing them cost." Read the summary first, but don't stop there: the detail sections often explain severity and likely cause, which matters more than the headline rating. If anything is rated as significant, it's reasonable to ask the inspector follow-up questions directly, or get a quote from a tradesperson before deciding whether it changes your offer.

Timing it against your conditions

Book the inspection as early as possible in your due diligence period — good inspectors get booked out, especially in a busy market, and you want enough time left afterwards to act on what the report says, whether that's renegotiating, asking for repairs, or walking away under your building report condition. Running it alongside your LIM report rather than one after the other is usually the more efficient order, since neither depends on the other.

Comparing more than one property

If you're weighing up more than one property at once, it's worth keeping each inspection's key findings somewhere you can compare them side by side, rather than relying on memory of which report said what about which house. That's a plain use case for a watchlist — notes against each property, kept next to everything else you're considering about it.