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  /  Construction Stage Inspections Explained
Perth New Home Inspection Guide

Construction Stage Inspections Explained

Learn when independent inspections can be arranged during a new home build, what may be reviewed at each stage and why timing matters before important work is covered.

Stage-by-Stage Inspection Guide Independent Construction Reporting

Construction Stage Inspections Are Timed Visual Assessments

Each inspection focuses on visible and accessible work at a particular point in the build. The most suitable stages depend on the home design, construction method, contract and when the builder can provide safe site access.

From Slab to Handover
Independent Construction Information

Why Inspect Before the Next Stage Covers the Work?

Some components become difficult or impossible to see after concrete is poured, wall linings are installed or finishes are completed.

✓Review visible work while it can still be accessed. ✓Document concerns with photographs and clear locations. ✓Raise findings before later work conceals the area. ✓Maintain an independent record of observed conditions. ✓Support informed communication with the builder.

Early-Stage Visibility

Reinforcement, membranes, services, framing and other components are easier to assess before they are covered by later work.

Clear Written Findings

The report records what was observed at that stage and identifies any areas that were inaccessible or already concealed.

Flexible Inspection Selection

One or several stages can be booked. The suitable combination depends on the construction type and the client’s priorities.

Final Handover Review

Practical completion focuses on visible defects, incomplete work and finishing issues before handover.

Common Inspection Points

Which Construction Stages Can Be Inspected?

Stage names vary between builders and construction methods. The inspection must be booked before the relevant work is covered and while safe access is available.

Foundation

Slab or Pre-Pour

Visible preparation may be reviewed before concrete is placed, subject to the selected service and site access.

Walls

Brickwork or Frame

Visible wall construction, openings, supports and relevant structural details may be reviewed.

Roof

Roof Frame or Cover

Accessible framing, tie-downs, bracing and visible roofing work may be reviewed at the relevant stage.

Before Linings

Pre-Plaster or Lock-Up

Visible framing, penetrations, services and preparation may be assessed before internal linings conceal the work.

Handover

Practical Completion

Visible defects, incomplete work, damage and finishing issues are documented before handover.

What May Be Reviewed?

Typical Areas Checked at Each Stage

The actual scope depends on the agreed service, plans supplied, site conditions, construction system and work visible on the inspection date.

Slab or Pre-Pour InspectionBefore concrete is poured or foundation work is concealed.

Depending on the construction type and agreed scope, visible foundation preparation may be reviewed against available plans.

Visible set-out and dimensionsReinforcement placement and support Vapour membrane conditionService penetrations and set-downs Footings or edge beams where visibleGeneral preparation before concrete placement
Brickwork, Wall Frame or Plate-Height InspectionWhen the main wall structure is visible.

This stage varies between double-brick, framed and mixed construction. The inspection focuses on visible work relevant to the selected system.

Wall alignment and workmanshipOpenings, lintels and supports Wall ties, bracing or framing connectionsDamp-proofing and flashings where visible Relevant dimensions and room layoutVisible deviations from supplied plans
Roof Frame or Roof Cover InspectionWhile framing and roof details remain visible and accessible.

The inspection may review visible roof framing, bracing, tie-down details and roof-cover installation subject to safe access.

Visible roof-frame membersBracing and tie-down connections Support points and framing junctionsPenetrations and flashings where visible Roof coverings and ridge detailsGutters and drainage components
Pre-Plaster or Lock-Up InspectionBefore internal wall and ceiling linings conceal the work.

A pre-lining inspection provides an opportunity to review visible framing, penetrations, services and preparation before the interior is closed.

Visible internal framing and supportsService penetrations and framing notches Wet-area preparation where visibleDoor and window openings Insulation where already installedAreas about to be concealed
Practical Completion InspectionNear the end of construction, before handover.

The practical completion inspection concentrates on visible defects, incomplete work, damage and the overall presentation of the home.

Internal and external finishesDoors, windows and accessible fittings Incomplete or damaged workVisible roof-space and exterior items Wet areas and accessible fixturesItems requiring builder attention
Booking and Inspection Process

How a Construction Stage Inspection Works

Good timing and clear communication with the builder are essential because construction can progress quickly.

Provide Approved Plans and Details

Supply the property address, stage, builder contact, approved building plans, relevant specifications, variations and the expected construction timeframe.

Confirm the Inspection Window

The builder should advise when the stage is ready and before the relevant work is covered.

Independent Site Inspection

The inspector reviews visible and accessible work within the agreed scope and, where applicable, compares it with the approved building plans, relevant National Construction Code requirements and applicable Australian Standards.

Receive the Written Report

Findings are documented with locations, descriptions, photographs and recommendations where appropriate.

Different Roles

Builder Supervision and Independent Inspection Are Not the Same

The builder manages construction and coordinates trades. An independent inspector provides a separate visual assessment for the client at the selected stage.

Construction Delivery

Builder and Site Supervisor

The builder is responsible for carrying out and managing the building work under the construction contract.

Coordinates trades and construction sequencing Manages site safety and access Controls the building program Addresses work through the builder’s processes Requests progress payments under the contract
Client-Focused Assessment

Independent Building Inspector

The independent inspector observes visible and accessible conditions and reports findings to the client.

Provides a separate visual assessment Documents findings with photographs Identifies access and inspection limitations Reviews the selected stage within the agreed scope Does not supervise the builder’s trades
Construction Inspection Report

What Should the Stage Report Contain?

The report should focus on the work visible at the selected stage and clearly identify findings and limitations.

Stage and Scope

The report identifies the construction stage, areas inspected and agreed scope.

Photographic Findings

Relevant photographs help show the location and visible condition of reported items.

Clear Descriptions

Each finding should explain the observed concern without overstating a visual inspection.

Recommended Attention

The report may recommend builder review, rectification, clarification or specialist assessment.

Inspection Limitations

Concealed, incomplete, unsafe or inaccessible areas should be clearly identified.

Plans, NCC and Standards

Where the relevant documents are supplied, visible and accessible work is reviewed against the approved building plans, applicable National Construction Code requirements and relevant Australian Standards within the agreed scope.

Book the inspection before the work is covered.

The build contract, construction method and builder’s program affect which inspections can be arranged. Confirm access, notification requirements and inspection timing with the builder early in the project. Comparison with approved plans, the National Construction Code and Australian Standards is limited to visible and accessible work within the agreed inspection scope and is not a complete certification or design audit.

Frequently Asked Questions

Construction Stage Inspections in Perth

General information for people building a new home in Western Australia.

How many construction stage inspections should I arrange?
You may arrange one stage or several stages. The most suitable combination depends on the construction method, budget, contract, builder program and parts of the build you want independently assessed.
When should I book the slab inspection?
Arrange it after the relevant preparation is complete but before concrete is poured. Confirm the timing with the builder because the available inspection window can be short.
Can brickwork and wall framing both be inspected?
Yes. Inspection stages can be adapted to double-brick, framed or mixed construction, so the agreed scope should reflect the actual building method.
Does the builder have to allow the inspector onto the site?
The builder controls the construction site and site-safety arrangements. Access should be agreed with the builder or authorised site representative before booking.
Is an independent stage inspection the same as council approval?
No. It is a separate service for the client and does not replace building permits, statutory approvals, builder supervision or specialist certificates.
What happens when the report identifies defects?
Provide the report to the builder and request that the findings are reviewed. The builder remains responsible for managing construction and determining the rectification process under the contract.
Should I still arrange a practical completion inspection?
Yes, because earlier stage inspections and practical completion serve different purposes. Practical completion reviews the visible finished home, incomplete work and finishing defects before handover.

Building a New Home in Perth?

Arrange independent construction stage inspections from slab and structural work through to practical completion and handover.

Contact Inspector Group to Arrange an Inspection