Building inspection report explained: a guide for Australian buyers

You've just received a 40-page PDF from your building inspector. It has a cover page, a few photos, and then section after section of technical language about things like "sarking", "efflorescence", and "non-compliant". There's a summary at the front that says the property is in "fair to average condition for its age and type", which tells you almost nothing about what to actually do next.

This is the guide you're looking for. A plain-English walkthrough of what an Australian building inspection report actually contains, what the terminology means, and how to read it in a way that helps you make a decision, not just gives you more anxiety.

What the report is (and what it isn't)

A building inspection report is a written record of a licensed inspector's visual assessment of a residential property. In Australia, most inspectors follow AS 4349.1-2007 (the Australian Standard for inspection of residential buildings), because their professional indemnity insurance requires it and because it's what buyers, sellers, and conveyancers expect.

The report documents the condition of the property at the time of inspection. It covers the structure, exterior, interior, roof space, subfloor (if accessible), site drainage, and services like plumbing and electrical, to the extent they're visible.

Here's what it is not:

• It is not a compliance check. The inspector is not certifying that the house meets the Building Code of Australia. They're noting what they observe.
• It is not a guarantee. The report captures a snapshot. Conditions can change after the inspection.
• It is not exhaustive. If the inspector couldn't access the roof space because of insulation, or couldn't see behind a built-in wardrobe, those limitations are documented. Anything behind a wall, under a fixed floor covering, or in a locked room is outside the scope.
• It is not a quotation. The report identifies problems. It does not price the repairs.

Understanding those boundaries is the first step to reading the report properly. The inspector is giving you the most complete picture they can within the limits of a visual assessment. They are not promising you the house is perfect, and they're not being evasive when they flag something as requiring further investigation.

The structure of a typical report

While the exact format varies between inspection companies, most Australian building inspection reports follow a similar structure. Knowing what each section does helps you navigate the document faster.

Cover page and summary. The property address, inspection date, inspector's name and licence number, and a high-level summary. The summary usually describes the property's overall condition using phrases like "fair condition for its age and type" or "generally sound with some items requiring attention". This section is intentionally broad. Don't rely on it alone.

Scope and limitations. A section (often near the front or the back) listing what the inspector could and couldn't access. This is legally important. If the subfloor was inaccessible, or the roof space was partially obstructed, or it was raining on the day, the inspector will note it here. Pay attention to this section, because anything listed as inaccessible is explicitly outside the scope of the report's findings.

Exterior. The outside of the building: walls, cladding, windows, doors, balconies, decks, retaining walls, fencing, driveways, paths. Common findings here include cracking in brickwork, deteriorated timber, rising damp in lower walls, damaged or non-compliant balustrades, and site drainage issues.

Interior. Room-by-room or area-by-area assessment of internal walls, ceilings, floors, doors, windows, wet areas (bathrooms, kitchen, laundry). Common findings: cracking in plaster, moisture in wet areas, uneven floors, sticking doors (which can indicate structural movement), and signs of previous water damage.

Roof exterior. The condition of roof tiles, metal sheeting, ridge capping, valleys, flashings, gutters, and downpipes. The inspector may access the roof by ladder or inspect from ground level depending on safety and the roof type.

Roof space. What's visible inside the roof cavity: rafters, battens, sarking (the reflective membrane under the tiles), insulation, ventilation, and evidence of leaks. This section often flags issues like inadequate bracing, water staining on timbers, or missing sarking.

Subfloor. If the house has a raised floor (stumps, piers, bearers, and joists rather than a concrete slab), the inspector will assess the subfloor space. This is where termite evidence, timber rot, inadequate ventilation, and drainage problems are most commonly found. Subfloor issues are especially common in older homes across Melbourne, Sydney, Brisbane, and Adelaide.

Services. A general visual check of plumbing, electrical, and sometimes gas fittings, to the extent visible. The inspector is not a plumber or electrician, so this section is limited to obvious concerns: old switchboards, visible leaks, non-compliant tap work, outdated wiring. Anything concerning gets flagged with recommend further investigation by the relevant specialist.

Photographs. Most modern reports include photos of key findings. These are worth cross-referencing with the written findings, because photos sometimes show more context than the text describes.

How to read the severity ratings

This is the most important part of the report and the part most buyers skip to. Inspectors classify each finding by severity, and while the exact labels can vary between companies, they generally map to four tiers:

Critical or major defect. A finding serious enough to affect the property's structural integrity, safety, or habitability. This is the one that should stop you scrolling and start you calling. Major defects typically require a licensed specialist to assess and rectify. Examples: structural cracking, failed deck framing, active termite damage, non-compliant electrical work.

Moderate defect. An issue that needs attention but isn't immediately dangerous. Left unaddressed, a moderate defect can become a major one. Examples: deteriorated mortar joints, minor roof leaks, weathered timber that hasn't yet failed, blocked guttering causing pooling.

Minor defect. Maintenance items or cosmetic issues that don't affect the building's performance. Examples: peeling paint, cracked tiles (non-structural), worn sealant, minor surface rust on metalwork.

Investigate. This means the inspector has seen something that warrants a closer look by a specialist, but they can't fully assess it within the scope of a visual inspection. This is not a hedge. It's the inspector directing you to someone with the right tools and qualifications to confirm what's going on.

When reading the report, focus your energy on the critical and investigate items first. Those are the ones that could affect your purchase decision, your negotiation position, or your safety.

The action-timing language

Most reports pair each finding with a timing recommendation. This tells you when the inspector thinks the item should be dealt with:

Before settlement (or "prior to purchase"). The inspector considers this important enough that it should be resolved, or at least quoted and understood, before you take ownership. These findings are your strongest negotiation leverage.

Within 12 months. Not urgent enough to hold up settlement, but should be addressed in the first year of ownership to prevent deterioration.

Ongoing monitoring. Not currently a problem, but worth keeping an eye on. The inspector is telling you to check this item at your next annual maintenance review.

The timing language matters more than the severity label on its own. A major defect flagged for "ongoing monitoring" is a very different situation from one flagged for "before settlement".

Common phrases and what they actually mean

Building inspection reports are full of shorthand that means something specific to inspectors but reads as vague to everyone else. Here are the ones that come up most often:

"Fair condition for its age and type." This is not a compliment or a criticism. It means the property is roughly what the inspector would expect for a building of that age and construction style. A 1920s weatherboard in "fair condition" is not the same as a 2015 brick veneer in "fair condition".

"Evidence of previous repairs." Someone has fixed something here before. The inspector can see the repair but may not know when it was done, who did it, or whether it was done properly. This is neutral, not alarming, unless paired with a severity flag.

"Not within the reasonable view of the inspector." Something was physically blocked, locked, covered, or otherwise inaccessible. The inspector isn't being lazy. They're documenting a scope limitation so you know that area wasn't assessed.

"Consistent with rising damp." The inspector has observed moisture patterns, salt deposits, or staining that match what rising damp looks like, but they haven't confirmed the diagnosis with invasive testing. A damp specialist is the next step.

"Non-compliant." Something doesn't meet current building standards or regulations. This doesn't always mean it was illegal when built. Standards change over time, and older properties may have features that were compliant at construction but aren't under current rules. Whether you need to bring it up to current code depends on the item and your council's requirements.

"Efflorescence." White crystalline salt deposits on masonry surfaces, caused by moisture moving through the brick or concrete. Minor efflorescence is common and cosmetic. Heavy efflorescence, especially low on a wall, can indicate rising damp.

"Sarking." The reflective membrane installed under roof tiles. If the report says "no sarking observed" or "sarking torn/damaged", it means the secondary weather barrier in the roof is missing or compromised. Important in areas with wind-driven rain.

What to do after you've read it

The report gives you the findings. It doesn't tell you what to decide. Here's how to turn it into action.

1. Identify the items that need attention before settlement. Filter the report down to anything classified as critical, major, or "before settlement". These are the items that could affect your negotiation, your contract conditions, or your willingness to proceed.

2. Get specialist quotes for anything flagged as "investigate". Every recommend further investigation item needs a specialist in the relevant trade: structural engineer for cracking, pest controller for termite evidence, plumber for drainage, electrician for wiring concerns. The specialist's report converts the inspector's observation into a confirmed finding with a scope and, usually, a rough cost.

3. Talk to your conveyancer about your options. Your conveyancer is the person who translates the inspection findings into contract leverage. Depending on your state and your contract type, you may be able to request rectification, negotiate a price reduction, extend your conditions, or withdraw. The conveyancer knows which of those options your contract actually supports.

4. Don't ignore the moderate and minor items. They're not urgent, but they're maintenance. The report is the most complete snapshot you'll ever get of the property's condition. Use it as a year-one maintenance plan after you move in.

Building and pest: two reports or one?

Many buyers order a combined "building and pest" inspection. This means the same company (sometimes the same person, sometimes two specialists working together) assesses both the building's structural condition and the presence of timber pests (termites, borers, wood decay fungi).

The pest section of the report follows AS 4349.3 (a separate standard from the building inspection standard). It focuses specifically on evidence of timber pest activity, conducive conditions (things that attract termites, like stored timber against the house, poor subfloor ventilation, or soil-to-timber contact), and the condition of any existing termite management system.

If your report is a combined building and pest, read both sections. The building section might flag a "softened bearer" as a structural concern, while the pest section flags the same area as "evidence of past termite activity". Together they tell a clearer story than either section alone.

A note about the inspector

Inspectors are not trying to scare you or sell you anything. They're documenting what they find within a defined scope, using a framework (AS 4349.1) that their insurance and professional body require. When the report feels vague or frustrating, it's usually because the standard limits what the inspector can say without invasive testing or specialist qualifications.

If anything in the report is unclear, call the inspector. Most are willing to spend 10 minutes on the phone walking you through their findings. They wrote the report. They know what they meant.

If the report still doesn't make sense

Some reports are 40 pages of boilerplate with the actual findings buried between disclaimers and stock photos of ideal roof spaces. If you're staring at your report trying to work out which items are serious, which are cosmetic, and what to do about any of them, Snagger translates Australian building and pest inspection reports into plain English. Every finding explained, severity rated, matched to the right trade, with questions to ask your inspector, vendor, and conveyancer. See what a full analysis looks like on a real report.

The answers are in your report. They're just not written for you.

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