Pre-Construction Dilapidation Reports in New South Wales: Timing and Process

A pre-construction dilapidation report is the first and most critical step in protecting a property from construction-related damage. This guide focuses on when to book the report relative to the development approval process, what triggers the need, and the practical timeline involved.

For a broader explanation of what a dilapidation report is and what it contains, see our comprehensive guide.

When to Book Relative to the Development Approval (DA)

Timing is everything with pre-construction dilapidation reports. The goal is to document the property after the development has been approved but before any physical works begin on the neighbouring site. Here is the typical sequence:

1. DA lodgement and determination — the developer lodges a DA with the local council. The consent, if granted, often includes conditions requiring dilapidation reports for properties within a specified radius.
2. Construction certificate (CC) stage — before obtaining a CC (which authorises construction to begin), the developer must demonstrate compliance with all DA conditions, including commissioning dilapidation reports.
3. Pre-construction inspection — the qualified inspector attends your property, documents existing conditions, and compiles the report.
4. Report delivery — the completed report is provided to the property owner, the developer, and in many cases the certifier or council.
5. Construction commences — only after the dilapidation report condition has been satisfied should physical works begin.

Ideally, the pre-construction inspection takes place within two to four weeks before works begin. If the report is completed too far in advance (months before construction starts), additional damage or changes may occur in the interim that are not documented.

What Triggers the Need for a Pre-Construction Report?

Several activities commonly trigger the need for a pre-construction dilapidation report in Sydney. If you are unsure whether your situation warrants one, see our guide on whether you need a dilapidation report.

• Excavation — any development involving basement excavation, deep footings, or bulk earthworks near property boundaries
• Demolition — the vibration and structural impact of demolishing an adjoining or nearby building
• Piling — driven or bored piles can transmit vibration through the ground to neighbouring foundations
• Dewatering — lowering the water table during construction can cause ground settlement affecting adjacent properties
• Heavy vehicle access — where construction traffic will travel along residential streets or driveways
• Infrastructure tunnelling — major projects like Sydney Metro or WestConnex that pass beneath or near existing buildings

Common NSW Council Conditions

Council conditions vary across Sydney, but most follow a similar pattern. A typical condition reads:

“Prior to the commencement of any works, a dilapidation report must be prepared by a suitably qualified person for all properties within [X] metres of the site boundary. A copy of the report shall be provided to the affected property owners and to the Principal Certifying Authority.”

Key variables in council conditions include:

• Radius — commonly 15 to 50 metres from the site boundary, depending on the depth of excavation and type of construction
• Timing — “prior to commencement of any works” or “prior to issue of construction certificate”
• Qualification of inspector — “suitably qualified person,” “registered building surveyor,” or “practising structural engineer”
• Distribution — who receives copies of the report

The Pre-Construction Timeline

For property owners, understanding the typical timeline helps with planning:

What Happens Between the Pre and Post Report?

Once the pre-construction report is complete, the property owner does not need to take further action until the construction is finished (or a concern arises during construction). The pre-construction report is safely stored and serves as the baseline for comparison.

If you notice new cracking, vibration damage, or other changes during construction, you should document these with photographs and dates. When construction is complete, a post-construction dilapidation report is carried out to compare the current state with the pre-construction baseline.

Ideally, the same inspector conducts both the pre- and post-construction reports for consistency. We connect you with professionals who offer paired pre/post assessments across Sydney.