Building Inspections: What to Look For Before You Buy

Buying a home is one of the largest financial commitments most people will make, and what you see on an open home visit is often only part of the picture. Underneath the fresh paint and tidy landscaping, a property may have structural issues, weathertightness problems, or deferred maintenance that could cost tens of thousands of dollars to put right. A building inspection, carried out by a qualified professional before you go unconditional, is one of the most effective ways to protect yourself. At Chaperone, we encourage every buyer to treat a building inspection as a non-negotiable step in the process.

What Does a Building Inspector Actually Check?

A building inspector carries out a visual assessment of a property's condition. They are looking at the structure, roof, exterior cladding, interior walls and ceilings, subfloor space (if accessible), electrical and plumbing (in general terms), drainage, insulation, and any visible signs of water damage or movement. In New Zealand, given the leaky building era that affected many homes built between roughly 1992 and 2004, weathertightness is a particular focus. Inspectors look for signs of moisture penetration around windows, cladding junctions, decks, and balconies.

It is important to understand that a building inspection is a visual assessment only. Inspectors do not open walls, lift floors, or carry out invasive testing unless specifically engaged to do so. This is why a standard building inspection should be seen as the baseline, not the ceiling, of your due diligence.

Common Issues Found in New Zealand Homes

New Zealand's housing stock is diverse, and the issues inspectors encounter vary by property age and type. Some of the more common findings include:

• Roof condition issues such as rusted flashings, cracked tiles, or aging iron
• Signs of moisture ingress around windows, in the subfloor, or in roof cavities
• Inadequate or no underfloor insulation
• Aging electrical wiring, particularly in homes with older systems
• Unconsented work such as additions or alterations without building consent
• Evidence of leaky building cladding systems including monolithic plaster and untreated timber framing
• Settling foundations or movement cracks in older masonry

None of these issues are necessarily deal-breakers, but each has cost implications that are worth quantifying before you commit.

Specialist Reports: When to Go Further

Depending on what the building inspector finds, they may recommend further specialist investigation. Common specialist reports in New Zealand include moisture testing (often using a probe or thermal imaging), methamphetamine testing, asbestos testing (particularly relevant for homes built before 1990), geotechnical reports for properties on slopes or in flood-prone areas, and engineer's reports for structural concerns. Each of these adds cost, but they can also provide the information you need to either renegotiate the purchase price or walk away with confidence.

Reading the Report

Building inspection reports can run to many pages and use technical language that may be unfamiliar. Most reputable inspectors will classify issues by severity, often using terms like urgent, significant, or maintenance. When reading the report, focus on the urgent and significant items first. A list of maintenance issues is normal for any property and should not cause alarm on its own. If you are unsure what a finding means in practical or financial terms, do not hesitate to call the inspector directly for clarification.

Negotiating After an Inspection

If the report reveals significant issues, you generally have a few options. You can request that the vendor rectify certain items before settlement, negotiate a reduction in the purchase price to account for the remediation cost, or walk away from the deal if your due diligence conditions allow. The right approach will depend on the nature of the issues, the current market, and your own risk tolerance. A mortgage adviser or conveyancing solicitor can help you think through the implications for your financing if the purchase price changes.

How to Find a Qualified Inspector

In New Zealand, building inspection is not a licensed profession in the same way as, say, plumbing or electrical work. However, many inspectors are members of professional bodies such as the New Zealand Institute of Building Inspectors (NZIBI) or the Building Officials Institute of New Zealand (BOINZ). Membership of these organisations provides some assurance of training and professional standards. Asking for a sample report before engaging an inspector is a reasonable way to assess the quality and depth of their assessments.