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How to Use a Building Inspection Report to Negotiate a Purchase Price

A building inspection report can be a powerful negotiating tool when buying a home in NZ. Here's how to read it and use it effectively.

How to Use a Building Inspection Report to Negotiate a Purchase Price

A building inspection report is one of the most useful tools a homebuyer has when negotiating a property purchase in New Zealand. Once you understand what the report is telling you, you can use its findings to either negotiate a lower price, request repairs, or — in serious cases — walk away from the deal altogether.

What Is a Building Inspection Report?

A building inspection report is a written assessment of a property's condition, prepared by a qualified building inspector. In New Zealand, inspectors typically assess the structure, roof, cladding, plumbing, drainage, moisture levels, and any visible defects. The report does not cover hidden work inside walls or electrical systems (unless a separate electrical inspection is arranged), but it gives you a solid picture of the property's overall condition.

It's worth noting that building inspectors in NZ are not currently required to hold a government licence, though many are Licensed Building Practitioners (LBPs) or members of professional bodies such as the New Zealand Institute of Building Surveyors. Always check your inspector's qualifications and experience before engaging them.

Reading the Report Before You Negotiate

Before you can negotiate effectively, you need to understand what you're reading. Most reports categorise findings by severity — commonly using terms like urgent, significant, moderate, or maintenance item. Focus your attention on:

  • Urgent or significant defects — These are issues that affect the safety, weathertightness, or structural integrity of the home. Examples include leaky cladding, substandard foundations, or serious roof damage.
  • Deferred maintenance — Items that aren't critical right now but will need attention soon, such as repainting, resealing, or gutter replacement.
  • Minor issues — Small cosmetic or wear-and-tear items that are normal in any lived-in home.

For anything related to weathertightness or cladding systems, it's worth cross-referencing with guidance from BRANZ, New Zealand's independent building research organisation, or checking the MBIE Building Performance website for information on common defects and the NZ Building Code.

Prioritising the Issues

Not every finding in a report justifies a price reduction. A useful approach is to sort findings into three buckets:

CategoryExamplesNegotiation Value
Safety or structuralLeaking roof, rotting framing, foundation movementHigh — significant price reduction or repair request
WeathertightnessFailing cladding, poor flashings, moisture ingressHigh — can be very costly to remediate
Deferred maintenanceOld paint, worn seals, minor drainage issuesModerate — factor into your offer
CosmeticScuffs, dated fittings, minor cracksLow — generally not a negotiation point

Get quotes from qualified tradespeople for any significant remediation work before you go back to the vendor. Having real numbers behind your negotiation is far more persuasive than a vague reference to "issues in the report."

How to Approach the Negotiation

Once you've prioritised the findings and gathered repair estimates, you have a few options:

1. Request a Price Reduction

Present the vendor (through your real estate agent or solicitor) with a clear summary of the significant defects and the estimated cost to remedy them. Ask for a price reduction that reflects those costs. Keep the conversation factual and unemotional — you're not criticising their home, you're adjusting for its actual condition.

2. Request Repairs Before Settlement

Instead of a price reduction, you can ask the vendor to fix specific issues before settlement. If you go this route, make sure any agreed repairs are completed by licensed tradespeople and that you receive documentation (e.g., documentation of compliance for plumbing work (confirm the specific documentation required with your plumber or the PGDB), or sign-off from an LBP for structural repairs). Check Licensed Building Practitioners to verify credentials.

3. Use It as a Walk-Away Trigger

If the report reveals serious defects — particularly leaky building issues, significant structural problems, or evidence of unpermitted work — it may be wiser to walk away. Check with your solicitor about your options under the sale and purchase agreement, especially if you have a building inspection condition in your offer.

Understanding Unpermitted Work

If the report flags work that appears to have been done without a building consent, this is a red flag. In New Zealand, certain work requires a building consent under the NZ Building Code, while some minor work qualifies as a Schedule 1 exemption. However, you should always confirm with your local council whether specific work was consented — never assume. Unpermitted work can affect your ability to get insurance or sell the property later.

When to Call a Professional

If the report raises concerns about electrical wiring, always engage a registered electrician — electrical work is restricted under the Electrical Workers Registration Board (EWRB) rules. Similarly, any plumbing or drainlaying concerns should be assessed by a licensed plumber registered with the Plumbers, Gasfitters and Drainlayers Board (PGDB). For structural or weathertightness issues, an LBP or registered engineer can provide a more detailed assessment and repair estimate.

If you need a qualified building inspector or any of the above tradespeople, you can find local professionals on tradedirectory.co.nz.

Frequently Asked Questions

Do I need a building inspection before making an offer in NZ?+

It's strongly recommended. You can either make your offer conditional on a satisfactory building inspection, or arrange a pre-offer inspection if the market is competitive. A conditional offer gives you the right to withdraw or renegotiate if the report reveals significant issues.

How much can I realistically negotiate off the price based on a building report?+

This depends entirely on the severity of the defects and the local property market. As a guide, you'd typically negotiate based on the actual estimated cost of remediation for significant defects. Get quotes from licensed tradespeople first so your negotiation is grounded in real figures rather than guesswork.

What if the vendor refuses to negotiate after the inspection?+

If the vendor won't budge and the defects are significant, you need to decide whether the property is still worth the asking price given the repair costs you'll face. Your solicitor can advise on your options under the sale and purchase agreement, particularly if you have a building inspection condition in place.

Can I use a building inspection report to get out of a deal in NZ?+

If your offer includes a building inspection condition and the report reveals issues you consider unsatisfactory, you may be able to cancel the agreement. The exact wording of your condition matters — always have your solicitor review it before signing anything.

Should I attend the building inspection in person?+

Yes, wherever possible. Being present allows the inspector to walk you through findings on the spot, point out areas of concern, and answer your questions directly. This gives you a much better understanding of the report than reading it cold afterwards.

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