Neighbour Construction Damaged My House in Ontario

Excavation, shoring or heavy equipment next door can shake a house. Then come the hairline cracks in drywall, a sticking door, or a crack in the foundation. It is stressful, especially when the work is still going on.

This article explains how these claims generally work in Ontario, how insurance fits in, what evidence helps, and which deadlines to watch. Every situation is different, so treat it as a starting point.

How a claim is usually framed

Claims for damage caused by neighbouring construction commonly rest on negligence, nuisance, and the conditions attached to the builder's permits. Insurance coverage, covered below, depends on the policy wording.

Private nuisance is an act that indirectly causes physical injury to land, or substantially interferes with its use or enjoyment, where the injury or interference is unreasonable in light of all the surrounding circumstances. Nuisance looks at the effect on your property rights, not at whether the builder was careless. Negligence, by contrast, asks whether the builder failed to take reasonable care. Which theory fits best depends on the facts.

Municipal rules on vibration and dust

A local municipality may prohibit and regulate noise, vibration, odour, dust and outdoor illumination by by-law, and may require permits for these matters. If your municipality has such a by-law, a complaint to the city may put pressure on the builder to change how the work is done.

Municipalities may also regulate site alteration, such as the removal of topsoil and changes to the grade of land, and may require permits and impose permit conditions. Grading or excavation next door may therefore be covered by a permit with conditions. Details vary by municipality, and Toronto acts under its own statute.

Insurance and who pays

Your home insurer may respond to the damage, and the neighbour's builder will usually carry its own liability insurance. Whether any policy covers a given loss depends on its wording, so read yours and ask the insurer directly.

• Tell your insurer promptly and ask what it needs from you.
• Ask in writing whether your policy covers vibration or settlement damage and what the deductible is.
• Give notice to the neighbour and the builder in writing, keeping a copy.
• Avoid signing a release or settlement until you know the full extent of the damage, since problems can appear over time.

How your own insurance claim and any claim against the neighbour or builder fit together depends on your policy wording and your situation, so ask your insurer about it directly and confirm with a lawyer.

Evidence that helps

• Photos and video of your house, dated, from before the work if you have them.
• Close-up photos of every crack with a ruler or coin for scale, repeated over time.
• A log of the work: dates of excavation, equipment used, and when you felt vibration.
• Any pre-construction survey the builder or municipality arranged.
• Written quotes or an inspection report from an engineer or contractor about cause and repair cost.
• Copies of emails, letters and permits connected to the project.

If you can, have the damage assessed early. Causation is often the main fight, and a dated, professional opinion can carry real weight.

Court options, deadlines and next steps

If the work is ongoing and still causing harm, a Superior Court of Justice judge may grant an interlocutory injunction or mandatory order where it appears just or convenient to do so. A court that can grant an injunction may also award damages in addition to, or instead of, it. Money claims up to $50,000, exclusive of interest and costs, can go to the Small Claims Court.

The basic limitation period is two years from the day the claim was discovered. A claim is discovered on the earlier of the day you actually knew the relevant matters and the day a reasonable person in your circumstances ought to have known them. No proceeding may be started after the 15th anniversary of the act or omission, whatever the discovery date. Because cracks can be noticed late, write down when you first saw each one.

A practical order of steps: document the damage, notify your insurer and the neighbour or builder in writing, get an assessment, and speak to a lawyer before signing anything or when the cost is significant.

Frequently asked questions