Building Construction Stage Inspections Perth
Building Construction Stage Inspections Perth, also known as a Stage Inspections (or construction progress inspection) compares the work at each stage of the new house build with the design and engineering plans. By completing inspections during each stage of construction, issues and defects can be identified and resolved before it becomes too late and potentially costly.
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What is Included in Each Stage Inspection?
Stage Inspections
Stage 1 - Pre Slab Inspection (Site Preparation & Foundations)
This inspection is carried out before the concrete slab is poured. Itβs one of the most critical stages, as defects at this point are often hidden permanently once the slab is installed.
We assess the site preparation and footing setup to ensure everything complies with engineering plans, NCC requirements, and Australian Standards.
What we check includes:
- Site cut, fill, and compaction
- Correct positioning and depth of footings
- Formwork alignment and dimensions
- Reinforcement placement (steel, mesh, bar chairs)
- Termite barrier installation (if applicable)
- Plumbing rough-ins through slab (location and protection)
- Moisture barrier (poly) installation and continuity
- Set-out accuracy (levels, boundaries, slab positioning)
Identifying issues at this stage prevents major structural problems, slab cracking, drainage issues, and costly rectification after the pour.
If itβs wrong here, itβs locked in forever.
Stage 2 - Slab Inspection
In Stage 2, we have the slab inspectionΒ where we make sure that the dried concrete is of the right quality, chemical properties and if the slab has the correct dimensions.
Hereβs what we inspect:
- The grade of concrete to be sighted via slump tests is still on site.
- Dimensions of the slab (Customer-supplied slab layout needed).
- Layout (wet area locations and plumbing inlets).
- Ensure concrete is cured and ready for brick load.
- Absence of cracks or categorise cracks sighted.
- Ensuring slab edge treatments have been carried out.
- Footings and pier footings.
- Full check to ensure slab and brick coursing heights are in relationship.
- Checking for an overall level slab.
- Categorisation of slab cracking concerning allowable AustralianΒ Standards.
- Ensuring pre-lays are in and not compromised.
Stage 3 β Plate Height Inspection
AΒ Plate Height Inspection, also known as the Brick Stage Inspection applies to brickwork, steel frame, timber frame or any combination of brick and other framing materials.
Here is what we inspect:
- Compliance with Australian StandardΒ AS3700Β Masonry Structures. and/or AS 4773.1 and .2
- Compliance with Australian Standard forΒ Β AS3660 Termite Management. or noting any DTS provisions
- Mortar quality and allowable bed and perp joints
- Brick bearing and allowances for load preparation.
- Lintel bearing where visible to ensure sufficient bearing is achieved
- Integrated fixings
- Lintel setbacks, orientation and fixings to columns and piers as engineered.
- Correct installation of wire ties, strapping, and weep holes relevant to NCC,Β AS3700,Β AS4773Β and AS3660.
- General workmanship issues such as faulty or damaged bricks, brick alignment, defective door and window frame installation.
- Flashing above windows and required cavity brickwork to ensure proper discharge of water.
- Plumbness and level of wall installation.
- Step deviations in brickwork.
- Compliance with alternative construction styles that may differ from bricks (e.g. timber or steel frame inspections are inspected to include the relevant applicable standards in place of brickwork standards)
Stage 4 β Suspended Slab Steel (double storey construction)
AΒ Suspended Slab Steel Inspection looks at the following items in a double storey construction.
Here is what we inspect:
- Installation of any necessary pre lay drainage systems.
- Proper installation of concrete formwork.
- Proper installation of any reinforcing steel in line with customer-supplied engineering.
- Proper installation of all plumbing, electrical or air conditioning installations.
- Compliance with all building codes and standards regarding mesh installation.
- Proper compliance with setbacks and separation of adjoining foundations or setbacks from formwork.
- Ensuring steel cover
- Ensuring the integrity of any installed membrane.
- Chairing wet are set downs if applicable including cog rods and balcony set downs.
- Ensuring adequate engineering integration from stairs to slabs are compliant.
- Ensuring lintel integration is installed compliant with engineering
- ***Note: Customer must provide engineering to allow engineering check, this will otherwise not be checked***
Stage 5 β Suspended Slab (double storey construction)
AΒ Suspended Slab Inspection looks at the following items in a double storey construction.
Here is what we inspect:
- The grade of concrete to be sighted via slump tests is still on site.
- Dimensions of the slab (Customer-supplied slab layout needed).
- Layout (wet area locations and plumbing inlets).
- Ensure concrete is cured and ready for brick load.
- Absence of cracks or categorise cracks sighted.
- Ensuring slab edge treatments have been carried out.
- Footings and pier footings.
- Full check to ensure slab and brick coursing heights are in relationship.
- Checking for an overall level slab.
- Categorisation of slab cracking concerning allowable AustralianΒ Standards.
- Ensuring pre-lays are in and not compromised.
Stage 6 - First Floor Plate Height (double storey construction)
A First Floor Plate Height Inspection looks at the following items in a double storey construction.
Here is what we inspect:
- Compliance with Australian StandardΒ AS3700Β Masonry Structures. and/or AS 4773.1 and .2
- Compliance with Australian Standard forΒ Β AS3660 Termite Management. or noting any DTS provisions
- Mortar quality and allowable bed and perp joints
- Brick bearing and allowances for load preparation.
- Lintel bearing where visible to ensure sufficient bearing is achieved
- Integrated fixings
- Lintel setbacks, orientation and fixings to columns and piers as engineered.
- Correct installation of wire ties, strapping, and weep holes relevant to NCC,Β AS3700,Β AS4773Β and AS3660.
- General workmanship issues such as faulty or damaged bricks, brick alignment, defective door and window frame installation.
- Flashing above windows and required cavity brickwork to ensure proper discharge of water.
- Plumbness and level of wall installation.
- Step deviations in brickwork.
- Compliance with alternative construction styles that may differ from bricks (e.g. timber or steel frame inspections are inspected to include the relevant applicable standards in place of brickwork standards)
Stage 7 β First Floor Roof Frame Inspection (double storey construction)
A First Floor Roof Frame Inspection takes place in order to prepare the home for roof cover in a double storey construction.
Hereβs what we Inspect:
- Roof frames are assessed using AS1684 (Steel frame roof members are assessed under the relevant Australian Standards)
- Subfloors and timber stud homes adopt more checks in addition to the following:
- Compliance with the latest plans and specifications.
- Appropriate wall placement.
- Ensuring correct top-plate installation and timber sizing.
- Ensuring steel lintel installation is compliant with engineering fit for bracing off.
- Trim assessment for compliance.
- Joists assessment for compliance.
- Hanger beam assessment for compliance.
- Assessment of rafter installation and compliance check with intersecting timbers.
- Struct and fan strut assessment and compliance check in addition to over-spanning checks.
- Underpurlin assessment for compliance.
- Ridge beam assessment for compliance.
- Collar tie installation assessment for compliance.
- hip and valley strutting assessment for compliance.
- Complaint fixings between members and straps.
Stage 8 - Roof Frame Inspection
Roof Frame Inspection (not required if done at the same time as stage 7).Β
Hereβs what we Inspect:
- Roof frames are assessed using AS1684 (Steel frame roof members are assessed under the relevant Australian Standards)
- Subfloors and timber stud homes adopt more checks in addition to the following:
- Compliance with the latest plans and specifications.
- Appropriate wall placement.
- Ensuring correct top-plate installation and timber sizing.
- Ensuring steel lintel installation is compliant with engineering fit for bracing off.
- Trim assessment for compliance.
- Joists assessment for compliance.
- Hanger beam assessment for compliance.
- Assessment of rafter installation and compliance check with intersecting timbers.
- Struct and fan strut assessment and compliance check in addition to over-spanning checks.
- Underpurlin assessment for compliance.
- Ridge beam assessment for compliance.
- Collar tie installation assessment for compliance.
- hip and valley strutting assessment for compliance.
- Complaint fixings between members and straps.
Stage 9 β Lockup Inspection (Lockup, Roof Cover, Waterproofing)
AΒ Lockup Inspection which includes a Waterproofing inspectionΒ takes place as the building nears its final stages. This Inspection focuses on preparing the home for final finishings and to ensure the home will perform once finishing items are installed.
This stage of the building construction inspections Perth assesses prep quality and ensures the builder is following the building guidelines.
Hereβs what we inspect:
- Roof cover inspections using AS3500 (not to be confused with a detailed AS3500 audit)
- Gutters and downpipes as well as box gutters and cappings installed if applicable
- Flashing fixings, assessment of hips, valleys and ridges
- Penetrations and relevant fixings using the BCA requirements
- Starting stage of doors, windows, plumbing pre lays, electrical pre lays, wall and ceiling cover to define the term lockup
- Brickwork inspection for obvious or stand out defects (not to be confused with a detailed AS3700 or AS4773.1&2 audit)
- Waterproofing inspection using AS3740 and the NCC (If waterproofing is done at the time of attendance)
- Ensuring application and compliance with internal corners, set-downs, water tops, building elements and falls for wet areas as defined in the NCC
Whilst focussing on the lockup generally, if compliance items are noticed we will report on them, detailed stage inspections are still recommended as this doesn’t replace the need for them to be carried out.
Stage 10 β PCI (Practical Completion Inspection)
AΒ Practical Completion Inspection (PCI)Β takes place prior to the turnover of keys to the purchaser and is the most important of all inspections. This Inspection focuses on minor defects and ensures the quality of the construction by the builder.
Hereβs what we inspect:
- Following the Guides to Standards and Tolerances in auditing the home as set out by the Building and Energy.
- Quality of finish to render, brickwork or cladding.
- Roof cover, ridge caps, valleys, flashings, roof plumbing and connections.
- Windows, fly screens, taps, fixtures and lintels.
- Balconies, garages, paving, fencing and alfresco areas.
- Internal flooring.
- Walls.
- Ceilings.
- Outlets.
- Cabinets and drawers.
- Bench tops, towel rails and fixings.
- Sinks and taps.
- Door furniture.
- Showers and leak tests on showers.
- Skirtings and handrails.
- Robes and internals.
- General workmanship.
- Appliances.
- Overall construction quality.
- Specific items included in aΒ Practical Completion InspectionΒ may vary depending on the scope of the project and council regulations.
Detailed Report with Photos
- Following our Building Construction Inspections Perth, our independent building inspector perth issue a detailed stage report for each stage that you request along with images relevant to stage we inspect. Our reports are customised for your property and will not be a standard report, after all how can it be?
- Each stage is treated independently as a separate report generated, this staged approach to construction inspections can save a huge amount of money and force builders to comply with NCC or National Construction Codes of Australia and put pressure on the builder to deliver a product fit for a paying and deserving customer. The small investment into Building Construction Inspections Perth always returns a higher quality build which in turn saves you tens of thousands of dollars in maintenance down the track.
- Building Construction Inspections Perth are intended to identify bad workmanship as well as errors in the NCC application to the build, it is NOT an opportunity to pick on the builder, and if the builder is doing the right thing (we all hope they will) the report may come back with a set of images stating that inspection was carried out in a satisfactory manner, giving you ultimate peace of mind.
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Frequently Asked Questions
Do you perform same-day Building Construction Inspections Perth?
Building Construction Inspections Perth
Yes. Our entire business model is focused on getting you the highest quality, detailed Building Construction Inspections Perth reports within 24 hours. That’s the WA Building Inspections Perth difference.
Why do I need a Building Construction Inspections Perth?
Why You Should Have an Inspection on a New Home
Building Construction Inspections Perth save you a huge amount of money and headache in the long-term because they force builders to comply with Australian Standard construction framework and put pressure on the builder to deliver a product fit for a paying and deserving customer.
Without Building Construction Inspections Perth, you will most definitely be left with a house build with hidden problems that could cost a fortune to resolve in the future.
Since 2000, poor workmanship has reared its ugly head through non-compliant waterproofing in new builds. 70% of homes built since 2000 now have some sort of waterproofing failure. Our stage 3 stage inspection includes a waterproofing inspection to ensure this does not happen to you.
What do you include in the report?
Building Construction Inspections Perth
Whether you need a building inspections Mandurah or any WA building inspections Perth, we document our findings, defects and commentary in plain-english. Our Building Construction Inspections Perth also include comprehensive and full photo reports.
If your report finds defects, can I withdraw from the purchase contract?
Building Construction Inspections Perth
All Building Construction Inspections Perth are in accordance with Australian Standards which means they are recognised by solicitors and real estate agents. The evidence or proof which is enclosed in our reports can be used by you and your solicitor to assess whether the contract has certain conditions to enable you to rescind the contract.
Our independent building inspectors perth are on-hand to assist you if you need guidance or a detailed explanation of the defects uncovered.
How much does a Building Construction Inspections Perth cost?
Building Construction Inspections Perth
Based on 4×2 home, a Building Construction Inspections Perth costs $399 for each stage you would like us to inspect. Remember, we have a price beat guarantee for all building inspections perth costs!
Do I need to have an inspection for all 10 stages?
No. Although highly recommended for all 10 stages for your peace of mind and to save you money in the long run, you can choose exactly which stages you would like us to inspect and report on.
In our experience, this process keeps the builder honest and ensures they do not cut corners. What does this mean for you? Better workmanship. A better house. Most importantlyu, this almost always ensures that your you do not end up in a mahor dispute with the builder at the end of construction.
What happens if a dispute arises with the builder during construction?
If issues identified during your stage inspections are not rectified by the builder, you have a clear pathway to escalate the matter with proper evidence.
The first step is to obtain a formal Defects and Liability Report. This is a detailed, evidence-based report that clearly documents all defective, incomplete, or non-compliant work against the building contract, NCC, and relevant Australian Standards. It is specifically structured to support dispute resolution and legal processes.
If the dispute progresses furtherβsuch as mediation, SAT (State Administrative Tribunal), or legal proceedingsβyou may require an independent Expert Witness Report. This report is prepared to a higher evidentiary standard and can be used in formal proceedings. Our expert witness Russell McCarthy can also attend tribunal hearings to present findings, answer technical questions, and support your case.
This structured approach ensures you are not relying on opinions, but on documented, defensible evidenceβgiving you the strongest possible position if the builder refuses to rectify defects.
Is it cheaper to request more than 1 stage inspection at once?
Building Construction Inspections Perth
Yes! Contact us with which stages you would like us to inspect at, and we provide you a discounted rate when combining multiple Building Construction Inspections Perth.
Recent Defects Uncovered
Recommended New Construction Building Inspections
PCI Inspection
A Practical Completion Inspection Perth (PCI) or handover inspection Perth is an inspection of the building work done on your new home just prior to you taking possession of your property from the builder.
Defects and Liability Report
Our defects and liability report ensures the builder is liable for any defects uncovered before the warranty period ends. The builder is liable to remediate defects (at no cost to the client) uncovered during an inspection.
Expert Witness Report
A formal report for disputes, identifying defective work against Australian Standards and NCC.
Used for SAT and legal matters, with the option for us to attend as your expert witness and support your case.
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