Your neighbour’s extension could be putting cracks in your walls — and the repair bill might land on your insurance claim. Vibration from piling, demolition, and excavation during urban building work commonly affects adjacent properties, with Australian standards setting peak particle velocity limits of 15–20 mm/s for residential buildings. Cross that threshold, and you could be looking at structural damage that costs thousands to fix — damage your insurer may not cover if you haven’t documented the condition of your property beforehand.
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This article is general information only and does not constitute professional legal or financial advice. For your specific situation, consult a qualified professional.
Australian law places clear obligations on the person doing the building work — and the property owner who hired them. Council approval does not shield them from liability if vibration, trespass, or structural damage occurs. The problem is that most people only find out about these protections after the damage is done.
Knowing what you’re entitled to before the diggers arrive changes everything. Neighbour disputes over property damage can drag on for months when the right paperwork wasn’t in place from the start. Here’s what you actually need to know.
One term you’ll hear repeatedly in this area is consequential damage.
What I tend to notice is that most people don’t realise how broad this definition is — it covers everything from a cracked driveway to a swimming pool losing structural support. The key is that it doesn’t matter whether the builder meant to cause damage or not.
Vibration limits, response windows, and the insurance rule you can’t skip
Three numbers matter most when a neighbour starts building: the vibration limit for your property type, the time you have to respond to a formal notice, and the insurance cover the builder must hold before they start.
Australian vibration standards AS 2187 and AS 2670 set peak particle velocity limits that vary by property type. These aren’t just guidelines — they’re the benchmarks used by engineers and courts to determine whether vibration caused damage.
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| Property Type | PPV Limit (mm/s) | Notes |
|---|---|---|
| Standard residential | 15–20 | Applies to most houses and units |
| Heritage-listed buildings | Lower than 15 | Stricter threshold per AS 2670 |
| Sensitive structures | 5–10 | Requires individual engineering assessment |
In Victoria, the Building Act 1993 requires the owner doing the work to serve a protection work notice on the adjoining owner. You have 14 days to respond. If you don’t, you’re deemed to have agreed. That means the builder can proceed even if you had concerns you never raised.
In Queensland, the QBCC can direct a builder to rectify consequential damage within 35 days. If the builder doesn’t comply, it goes on their public record and can lead to fines or demerit points. The process starts with you lodging a complaint — but only after you’ve tried to resolve it directly with the contractor first.
Where people get caught out
The research I’ve looked at points to four common gaps that cost property owners time and money. Each one is avoidable if you know what to look for.
Skipping the pre-construction condition survey
This is the single biggest mistake. A dilapidation report or pre-construction survey records every existing crack, defect, and movement in your property before work starts. Without it, proving that a new crack came from the neighbour’s piling — and not from last year’s drought — becomes a he-said-she-said argument. Insurers and tribunals both rely on this document. If the builder hasn’t offered one, you should ask for it in writing. If they refuse, that refusal itself becomes evidence.
Not checking the builder’s insurance policy
A standard public liability policy typically doesn’t cover the specific risks of damage to adjoining properties. The Victorian Building Authority is clear on this: the contract for insurance must cover an amount agreed between the owner and the adjoining owner, and a copy must be provided before work starts. I’d want to see that policy with my own eyes — not just take someone’s word for it. If you’re unsure what to look for, a legal service specialising in property disputes can review the policy for you.
Missing the 14-day response window
In Victoria, a protection work notice gives you 14 days to agree, disagree, or request more information. If you do nothing, you’re deemed to have agreed. That means you lose the right to object to the protection work — or to demand a higher standard of insurance cover. The clock starts the day the notice is served, not the day you open it.
Assuming council approval means the builder is covered
Council approval is about compliance with planning and building codes. It has nothing to do with liability for damage to your property. The research from SERS is explicit: compliance with local council noise and vibration limits does not protect builders from common law claims if actual damage occurs. Approval is not a shield.
How to protect your property — and your insurance claim — when the neighbours build
This section walks through the practical steps in the order they should happen. Each one is grounded in the legal frameworks operating across Australia.
Get a pre-construction condition survey arranged
This is your first move. The owner doing the work is responsible for arranging and paying for the survey, but you have the right to be involved. The survey should record all existing cracks, defects, and movement, and both parties should sign it as an agreed record. If the builder won’t arrange one, you can commission your own independent inspection. The cost is typically a few hundred dollars — compared to thousands in disputed repairs, it’s cheap insurance. Document everything with photos and date stamps. A property insurance claims guide can help you understand what insurers will expect to see if you need to lodge a claim later.
Demand proof of the builder’s insurance and the protection work notice
Before any excavation or piling starts, you’re entitled to two things: a copy of the builder’s insurance policy covering damage to adjoining property, and (in Victoria) a formal protection work notice detailing how the builder will protect your property. In NSW, the Access to Neighbouring Land Act 2000 governs access arrangements. In Queensland, the QBCC expects you to have attempted direct resolution with the contractor before lodging a formal complaint. Get everything in writing. If you’re dealing with a complex boundary situation, a real estate law specialist can help you understand your rights under the relevant state legislation.
Insist on real-time vibration monitoring at the boundary
Builders should install vibration monitors and tilt sensors on the boundary line before work begins. These devices provide real-time data and can trigger an automatic work stoppage if vibration levels exceed the 15–20 mm/s threshold. If the builder says it’s not necessary, you can point to the Australian standards and the non-delegable duty of care. You don’t need to be an engineer to ask for this — it’s a standard part of responsible construction practice.
Know the formal dispute process in your state
If damage occurs and the builder won’t cooperate, each state has a formal process. In Queensland, you lodge a complaint with the QBCC through their portal, providing contractor details, photos, and evidence of your attempts to resolve the issue directly. A Resolution Services officer will contact both parties. If unresolved, a building inspector may conduct a visual inspection, and the QBCC can issue a direction to rectify with a 35-day deadline. In Victoria, disputes about protection work or insurance cover can be referred to the Building Appeals Board. The key is to act quickly — delays can weaken your case.
Frequently asked questions
What if the builder refuses to do a pre-construction survey? ▾
Does home insurance cover damage from a neighbour’s building work? ▾
What if my neighbour’s builder crosses my property line with a crane? ▾
How long do I have to make a claim after the damage appears? ▾
What if my neighbour’s builder damages a shared fence or retaining wall? ▾
Can I stop work if I think it’s damaging my property? ▾
Documentation is your only real protection
The pattern across all the research is clear: the people who get paid for damage are the ones who documented everything before the work started. Surveys, insurance policies, vibration data, and written correspondence form the evidence chain that insurers and tribunals rely on. Without it, you’re left trying to prove causation long after the diggers have left.
Remember: this article is general information only. For advice on your specific situation, speak to a qualified professional.
If this was useful, you might also want to read Storm Season Survival: A Comprehensive Guide to Property Insurance Claims in Australia.
Sources and Further Reading
Neighbour Disputes and Property Damage: Who’s Responsible and Who Pays? — A closer look at liability and cost recovery in neighbour disputes.
Property Insurance Claims Denied? Expert Tips to Fight Back — Practical strategies if your insurer rejects a damage claim.
SERS (2024). Neighbour Construction Property Damage Australia. 🔗
Queensland Building and Construction Commission (2024). Damage to your property from neighbouring work. 🔗
Victorian Building Authority (2024). Protecting Adjoining Properties. 🔗
