Do You Need a Dilapidation Report in Sydney? When It Is Required

Not every construction project requires a dilapidation report. But when one is needed, the consequences of not having one can be costly. This guide helps you determine whether your situation calls for a dilapidation report, whether it is mandatory or simply recommended.

When a Dilapidation Report Is Mandatory

In Sydney, a dilapidation report becomes mandatory in specific circumstances:

Development Approval (DA) Condition

The most common mandatory trigger. When a council approves a development application, the consent conditions frequently require the developer to commission dilapidation reports for neighbouring properties. If you receive a letter from a developer requesting access for a dilapidation survey, it is almost certainly because the council has required it.

Excavation Near Property Boundaries

Any development involving excavation deeper than 1.5 metres within the zone of influence of neighbouring buildings will almost always trigger a dilapidation report requirement. The zone of influence is typically calculated as one to two times the excavation depth, measured horizontally from the excavation face.

Demolition of Adjoining or Nearby Structures

Demolition generates vibration and removes lateral support from shared or adjoining walls. Councils routinely require dilapidation reports for properties within 15 to 25 metres of a demolition site.

Heritage-Listed Properties

If your property is heritage-listed (or within a heritage conservation area) and construction is proposed nearby, the council is more likely to impose dilapidation report conditions with broader coverage.

Government Infrastructure Projects

Major projects such as Sydney Metro, WestConnex, and light rail projects have statutory requirements for dilapidation reporting along their alignment. These are typically managed by the project authority.

When a Dilapidation Report Is Recommended (but Not Mandatory)

Even without a council condition, getting a dilapidation report is a prudent decision in these situations:

• Your neighbour is renovating or extending — even modest works involving excavation for footings can affect adjacent properties, particularly older buildings on reactive clay soils
• Road or utility works nearby — water main replacement, sewer relining, or road resurfacing involving heavy machinery
• You own a strata unit — strata buildings can be affected by construction on adjoining or nearby sites; the body corporate may not commission a report unless prompted
• Your property has existing structural concerns — if your building already shows cracking or settlement, documenting the current state before any nearby construction is essential
• You are selling soon — if construction begins during your ownership and you sell before it finishes, the buyer inherits the issue without a baseline

When You Probably Do Not Need a Dilapidation Report

• The nearby construction is minor (interior fit-out, painting, landscaping with no excavation)
• The construction site is more than 50 metres from your property and does not involve piling or tunnelling
• The works involve no excavation, demolition, or heavy machinery
• The development is a single-storey residential alteration on a site that does not share a boundary with your property

Decision Framework

Use this table to guide your decision:

Not sure which category your situation falls into? Try our interactive Do I Need a Dilapidation Report? quiz for a personalised recommendation.