AS4349.1 is the Australian Standard your building inspector should be working to when they do a pre-purchase inspection. It defines what they look at, how they assess it, and how they report findings. It does notmandate quality — cheap inspectors still claim to follow it. What it gives you is a known framework to read your report against and to push back on if the inspector cut corners.
What does this mean for your property?
This guide explains the general issue. Decode your own report for prioritised findings, repair cost estimates and questions to take to your inspector.
One-off payment · No account requiredEvery Australian pre-purchase building inspection is meant to be done to Australian Standard 4349.1. Buyers see it referenced on the first page of their report — usually buried in the disclaimer section — and assume it's just bureaucratic boilerplate.
It's not. AS4349.1 is the playbook your inspector should be following. Knowing what it actually requires (and what it deliberately leaves out) is the difference between trusting your inspection and being blindsided three weeks after settlement.
What AS4349.1 actually covers
AS4349.1-2007 is titled "Inspection of buildings — Pre-purchase inspections — Residential buildings."Published by Standards Australia, it's the technical baseline for the most common kind of building inspection you'll commission as a buyer.
The standard requires the inspector to assess:
- Site: drainage falls, retaining walls, fencing, surface conditions, paths
- Sub-floor space: ventilation, moisture, framing, stumps, joists, bearers — IF accessible
- Exterior: walls, cladding, windows, doors, roof, gutters, downpipes, eaves, fascias
- Roof space: framing, sarking, insulation, plumbing penetrations — IF accessible
- Interior: walls, ceilings, floors, windows, doors, joinery, wet areas, kitchen
- Services: visible plumbing, visible electrical, hot water service, heating — visual only
- Outbuildings: garages, sheds, carports, fences
Note the word accessible. AS4349.1 is a visualinspection of what the inspector can safely access on the day. They're not allowed to lift carpets, drill holes, or break into wall cavities. If your sub-floor is sealed off, that gets a "not inspected" note in the report.
What it deliberately leaves out
The standard is just as important for what it doesn't cover. These gaps catch buyers out constantly:
- Asbestos identification: the inspector flags visual indicators but cannot confirm asbestos without lab testing. If your pre-1990 home has asbestos cement sheeting somewhere (most do), you need a separate hazardous-materials survey ($700–$1,200) for certainty.
- Electrical compliance: the inspector notes obvious safety concerns (no RCDs, exposed wiring) but isn't a licensed electrician. For full compliance certification you need a separate electrical safety check (~$250).
- Plumbing pressure / function testing: visual only. They won't actually pressure-test pipes or run drainage cameras unless commissioned separately.
- Pool integrity: separate AS1926 pool barrier inspection required.
- Soil / foundation engineering: structural cracks get flagged but engineering assessment is separate.
- BAL bushfire rating: separate Bushfire Attack Level assessment if you're in a BAL zone.
- Pest inspection: AS4349.1 doesn't cover termites. That's AS4349.3, usually a separate but often combined report.
These exclusions live in your report's "Scope & Limitations" section. Most buyers skip it. Read it.
How the inspector classifies findings
AS4349.1 asks inspectors to classify defects in three tiers:
- Major defects: issues that pose a safety risk, structural concern, or are likely to require significant expenditure. These are the negotiation drivers.
- Minor defects: wear-and-tear items, cosmetic issues, maintenance backlog. Cumulative cost matters here even if individual items are small.
- Items requiring further investigation:things the inspector saw but couldn't fully assess from visual evidence. Common examples: suspected termite damage (needs invasive inspection), cracked tiles in wet areas (needs membrane test), foundation movement (needs engineer).
Items in the third bucket are easy to gloss over but are often where the biggest costs hide. If your inspector says "recommend further investigation by a structural engineer," that recommendation might be $20K–$50K of rectification work in disguise.
What a quality AS4349.1 report looks like
A good AS4349.1 inspection report should have:
- 40+ pages for a standard residential property. Anything under 25 pages on a typical 3-bedroom house is suspicious.
- Photos of every defect — annotated where helpful. No photos = the inspector either didn't look or didn't document.
- Specific locations — "crack in eastern wall of master bedroom, approximately 1.2m from corner" not "crack in wall."
- Severity classifications matched to AS4349.1 terminology (Major / Minor / Further Investigation).
- An accessible "Scope & Limitations" section listing every area NOT inspected and why.
- Recommended trades for rectification of each defect.
- The inspector's licence number + insurance details on the front page.
Common report problems to watch for
Hedging language designed to limit liability
Inspectors are sued more than any other trade. As a result, reports are littered with phrases like "could be indicative of..." or "may require further inspection" that obscure how serious the issue is. AS4349.1 doesn't require severity scores or repair-cost estimates, so most reports give neither.
This is the gap Report Decoded fills — we re-read your AS4349.1 report and surface the actual severity + estimated repair cost in plain English, without the liability hedging.
"Restricted access" entries
When sub-floor or roof space is noted as "restricted access" or "not inspected," that's a flag — not a deal-breaker. Decide whether to commission a follow-up access inspection (borescope, $400–$800) or proceed knowing the gap exists.
The infamous "recommendation to engage a specialist"
If the report says "recommend further inspection by a [structural engineer / pest controller / plumber / electrician]," the inspector is telling you something they noticed but couldn't fully assess. Read these carefully. They're often the most important items.
What to do once you've got the report
Three immediate actions:
- Read the "Scope & Limitations" section first. Know what was NOT inspected. Decide if any of those gaps need filling before exchange.
- List every Major Defect with an estimated repair cost.This becomes your negotiation list. Most buyers either don't translate the report into a dollar amount or under-cost the items. We have a separate guide on how much to negotiate after a building inspection.
- Identify which trade fixes each defect.A bricklayer for mortar, a concreter for slab edges, a stair specialist for nosing compliance, a pest controller for termites. Generic "builder" is rarely the right call. Report Decoded matches the right tradie to each defect automatically — across 22 trade categories.
Why this matters financially
On a typical $850K–$1.5M Australian residential purchase, a properly-read AS4349.1 inspection surfaces $15K–$80K of legitimate negotiation room. Vendors price their property assuming average buyer due diligence. Better due diligence = better outcomes.
The $550–$750 you pay for the inspection AND the $39 for Report Decoded's analysis are rounding errors against the negotiation upside. The buyers who walk away from inspections without negotiating are leaving money on the table — sometimes tens of thousands.
The short version
AS4349.1 is the playbook your inspector follows. Knowing what it requires (and what it leaves out) means you can:
- Tell a thorough inspection from a perfunctory one.
- Spot the "restricted access" gaps and decide whether to fill them.
- Read past the liability-hedging language to the actual findings.
- Convert defect lists into negotiation dollar amounts.
- Match the right specialist trade to each rectification.
Report Decoded automates the last four. Upload your PDF and we'll do the heavy lifting in under 2 minutes — $39, no subscription, every claim cited to your inspector's page.