REIWA Annexure vs a Private Building Inspection in Perth

If you are buying a home in Perth, you will come across two different inspection documents, and it helps to understand what each one is. One is the REIWA structural annexure, often arranged through the real estate agency as part of the offer process. The other is a private pre-purchase inspection that you commission yourself. They are not the same thing, and knowing the difference puts you in a stronger position before you sign.

What the REIWA Annexure Covers

REIWA is the Real Estate Institute of Western Australia. It represents the industry and provides standard documents used in WA property transactions, including an Australian Standard structural inspection annexure.

The REIWA annexure is a structural inspection. It reports on the major structural elements of the building to confirm the structure meets its intended performance: load-bearing walls, the concrete slab and footings, the sub-floor, and the roof frame, within accessible areas.

This is genuinely useful, and it is the most commonly used structural inspection in a Perth offer. What it does not do is report on minor or common building defects. The annexure is focused on structural adequacy, so the everyday items that affect how a home lives day to day sit outside its scope.

What a Private Building Inspection Adds

A private pre-purchase inspection, commissioned by you, works to AS 4349.1 and covers the full picture: structure plus the items the structural annexure leaves out. That includes things like:

• Plumbing fixtures and visible pipework
• Hot water systems and air conditioning
• Smoke alarms and basic electrical safety items
• Insulation and ceiling spaces
• Pergolas, decking, and outbuildings
• Doors, windows, seals, and wet-area waterproofing

A private inspector also tailors the report to the specific home in front of them. The standard annexure documents are generic by design. A private inspection picks up the quirks of an individual property: an older render system, a sub-floor that needs closer attention, a recent addition that was not built to the same standard as the original house.

For most Perth buyers, the two work well together. The annexure confirms the structure. A private inspection gives you the complete condition report and the detail you use to plan and to make a confident decision.

How Defects Are Classified

Whichever inspection you read, defects are grouped into two broad categories, and understanding them is the most useful skill for a buyer.

Major defects affect a major component of the building and could compromise its structure, safety, or habitability if left unaddressed. They generally fall into recognised categories:

• Damage
• Distortion, warping, or twisting
• Water penetration or rising damp
• Material deterioration
• Operational faults
• Installation faults
• Termite damage

Minor defects can still be worth knowing about, but they do not make a home unliveable. Plumbing wear, a tired hot water system, an ageing air conditioner, insulation gaps, and worn doors or windows are typical examples.

Almost every established Perth home has some defects. The point of an inspection is not to find a flawless property, it is to tell you which defects are minor and which are major, who is likely to be responsible for them, and whether the cost to put them right sits comfortably within your plans for the home.

Major Defects and Your Offer

In WA, where a pre-purchase inspection identifies a major structural defect, that finding can affect your position under the contract, including, in some cases, the right to cancel a purchase that was made subject to a satisfactory structural inspection. The exact effect depends on how your offer and annexure were worded.

This is where your settlement agent or conveyancer matters. They will tell you precisely what your contract allows based on the inspection result. Our job is to give you a clear, accurate report of the property’s condition the same day, so you and your settlement agent are working from solid information rather than guesswork.

If you would rather place an offer before the inspection is complete, a common approach is to make the offer conditional on a satisfactory structural or property condition report. That keeps your options open while the inspection is arranged.

Buying a Home Still Under Construction

If the Perth home you are buying is still being built, staged inspections during construction let an inspector check the work as it happens, so anything that needs attention is picked up at the right point rather than after handover. Useful stages include the concrete slab, plate high, roof frame, and practical completion inspections. Our new-build stage inspections walk through how each one fits the build sequence.

Getting the Full Picture

The annexure and a private inspection answer slightly different questions. The annexure confirms the structure. A private pre-purchase inspection gives you the full condition report, the everyday-living detail, and a document written for your specific property.

A SURE building inspection works to AS 4349.1, reports the same day, and comes with our help reading it. Ring head office and a trained team member will walk you through any finding on the call, and for anything technical we route you back to your inspector. For a wider view of the Perth buying process, our Perth pre-purchase building inspection guide brings the whole picture together.

To book, call 1300 787 327 and we will arrange an inspection that fits your settlement timeline.