Pre-Construction Dilapidation Reports in Western Australia: Timing and Process

When to book, what triggers the requirement, and how the process works — so your property is documented before a single excavator arrives on site.

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When to Book a Pre-Construction Dilapidation Report

Timing is critical. A pre-construction dilapidation report must be completed before any ground disturbance, demolition or heavy machinery activity begins on the adjacent site. Booking too late means the baseline is compromised — any existing damage becomes impossible to distinguish from construction-caused damage.

The ideal window is two to four weeks before construction starts. This allows enough time for the surveyor to inspect the property, compile the report and deliver it before works commence. In practice, the best trigger point is when you receive notice that a development approval (DA) has been granted for a neighbouring property, or when you see demolition or site preparation activity beginning.

If a council condition requires a dilapidation report, check the wording carefully. Most conditions specify that the report must be completed and submitted to council before the issue of a building permit or before commencement of works. Missing this deadline can create compliance issues for the developer and leave your property unprotected.

What Triggers the Need for a Pre-Construction Report

Not every construction project requires a dilapidation report, but certain types of work carry significantly higher risk of affecting neighbouring properties. The following triggers are the most common across Perth.

Excavation and Earthworks

Any significant excavation near a property boundary can destabilise the ground beneath neighbouring foundations. In Perth, where sandy soils are prevalent, excavation for basements, undercrofts and swimming pools poses particular risks. Even shallow excavation for new footings can cause lateral soil movement.

Demolition Works

Mechanical demolition generates vibration that travels through the ground and can cause cracking in adjacent structures. Knockdown- rebuild projects are one of the most common reasons Perth homeowners request pre-construction reports, particularly in established suburbs undergoing infill development.

Heavy Machinery and Piling

Driven piles, bored piles, dynamic compaction and the sustained operation of heavy plant equipment create vibrations that can propagate 30 metres or more through Perth soils. Multi-storey developments and commercial projects that require deep foundations are high-risk scenarios.

Dewatering Operations

When the water table is lowered to allow below-ground construction, surrounding soil can consolidate and settle. This is particularly relevant in Perth coastal suburbs and low-lying areas near the Swan River and wetlands, where groundwater levels sit close to the surface.

Common WA Council Conditions That Mandate Pre-Construction Reports

Perth metropolitan councils regularly impose dilapidation report conditions on development approvals. While the exact wording varies between councils, the intent is consistent: protect neighbouring properties from construction damage.

Typical conditions require the developer to commission dilapidation surveys of all properties within a specified distance of the construction site — often 15 to 30 metres — before commencement of works. The reports must be prepared by a qualified building surveyor or structural engineer and copies provided to the affected property owners and the council.

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City of Perth: Commonly requires pre and post construction dilapidation surveys for basement excavations and multi-storey developments in the CBD and inner suburbs.
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City of Stirling: Frequently attaches dilapidation conditions to approvals involving demolition and medium-density development in suburbs like Scarborough, Doubleview and Balcatta.
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City of Joondalup: Applies dilapidation conditions to developments near residential properties, particularly where significant excavation or piling is proposed.
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City of Wanneroo: Conditions are common for subdivisions and grouped dwelling developments in growth areas where new construction abuts established homes.

If you are unsure whether a council condition applies to your situation, contact your local government planning department or speak with our team for guidance.

Timeline: From Booking to Delivery

Understanding the timeline helps you plan ahead and ensures your report is completed before construction begins. Here is a typical timeline for a pre-construction dilapidation report in Perth.

1-2d

Quote and Booking

You request a quote, we confirm the scope and fee, and schedule the inspection. Most bookings are confirmed within one to two business days.

1-3h

On-Site Inspection

The qualified surveyor inspects the property, taking photographs and measurements. A standard residential inspection takes 1.5 to 3 hours depending on the property size.

3-5d

Report Compilation and Delivery

The surveyor compiles the findings into a professionally formatted PDF report. Standard delivery is 3 to 5 business days. Urgent turnaround within 24 to 48 hours is available when construction start dates are imminent.

In total, you should allow one to two weeks from initial contact to report delivery. If construction is scheduled to begin within days, let us know and we will prioritise your booking. View our pricing guide for current Perth rates.

Pre-Construction vs Post-Construction Reports

A pre-construction report and a post-construction report work together as a pair. The pre-construction report establishes the baseline. The post-construction report documents the same property after works are complete. By comparing the two, any new damage can be objectively identified and attributed to the construction activity.

Aspect	Pre-Construction	Post-Construction
Purpose	Establish baseline condition	Identify new damage
Timing	Before works commence	After works are complete
Content	Full property documentation	Comparison against baseline
Outcome	Baseline record filed	Damage claim if warranted

For the strongest protection, we recommend commissioning both reports. Learn more about the post-construction report process and how the comparison works.

Pre-Construction Report FAQs

It is not ideal, but a report can still be valuable. If construction has recently commenced and no significant ground disturbance has occurred, a surveyor can document the current condition. However, the report will note that some works have already begun, which may weaken its evidentiary value if damage is later disputed. The sooner you act, the stronger your position. Contact us immediately if construction is underway.

Yes, frequently. Government agencies including Main Roads WA, Water Corporation and local councils routinely require dilapidation surveys before major infrastructure projects. This includes road widening, rail construction, water main replacement, sewer upgrades and stormwater drainage works. If you have been notified about upcoming infrastructure works near your property, you have the right to request a condition report.

The builder cannot prevent you from having your own property documented. If a council condition requires the builder to arrange reports for neighbouring properties and they fail to do so, you can report the non-compliance to your local government planning department. You can also independently commission your own report for your property at any time — you do not need the builder's permission to protect your own interests.

Construction Starting Soon? Get Your Property Documented Now

Every day you wait is a day closer to losing your baseline evidence. We connect Perth property owners with qualified surveyors who deliver thorough pre-construction dilapidation reports on your timeline.

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