Who Is Liable When a Tree Falls?

The law is more forgiving of tree owners than most people fear, and harder on those who ignored the signs. Here is how liability actually works.

Written by John McNamara, arboricultural consultant, McNamara Tree Consultancy

A tree comes down in a storm and lands on a neighbour's car, a shed, a boundary wall. The first question everyone asks is the same one. Whose fault is it, and who pays? The honest answer is that it depends on what was known, or should have been known, about the tree before it fell, and the law is more forgiving of tree owners than most people expect.

The starting point: a falling tree is not automatic liability

Owning a tree that falls does not make you liable for the damage it causes. In Northern Ireland and Ireland alike, liability turns on negligence. The question a court asks is whether a reasonable owner would have known the tree was likely to fail, and whether they took reasonable steps in response. A sound, well-maintained tree brought down by an exceptional storm is treated as an accident. Nobody is expected to guarantee that a tree will stand through every gale.

Where owners do become liable is when there were signs. A large dead limb hanging over the road for two years. Fungal brackets at the base that anyone could see. A previous complaint or a letter from a neighbour that went unanswered. Liability follows foreseeability, and foreseeability follows visible evidence.

If you are already worried about a particular tree, that worry is worth acting on rather than living with. A tree condition survey or a tree inspection settles the question either way, and McNamara Tree Consultancy covers Northern Ireland, Ireland and the wider UK, so wherever the tree stands, reach out and we will tell you honestly whether it needs anything at all.

What insurers actually do

In practice, most storm damage is settled by insurance rather than by argument. If a neighbour's tree damages your property, it is normally your own buildings or motor policy that pays in the first instance. Your insurer may then attempt to recover the cost from the tree's owner, but only if it can show the owner was negligent. This surprises people on both sides of the fence, and it is why the state of the tree before the storm matters so much more than the storm itself.

The duty of care, in plain terms

Landowners in Northern Ireland and Ireland owe a duty to take reasonable care that their trees do not injure people or damage property. Reasonable is the operative word. The duty scales with the situation. A tree overhanging a school entrance deserves more attention than one in the middle of a field, and the law does not demand professional inspection of every tree on every farm. What it rewards is a sensible, proportionate approach, applied consistently.

The strongest defence costs the least

If a tree of yours ever does fail, the single most valuable thing you can own is a record. A note that the trees near the road were looked at, when, by whom, and what was decided. A proportionate tree risk assessment, the clearest form of tree safety survey, carried out at sensible intervals and kept on file, is precisely this record. Our guide to tree survey costs explains what one involves, and the answer is usually far less than people fear. It demonstrates that you took the duty seriously, and in the great majority of cases that is the difference between an insured accident and a negligence claim.

This is also why felling every tree near a boundary is the wrong response to worry. The duty is to manage risk reasonably, not to eliminate trees, and a documented decision to retain a healthy tree is a defensible decision.

After a storm

Make the scene safe, photograph everything before anything is cut, notify your insurer before arranging removal, and keep a section of the failed stem if there is any question about decay. If the failure exposes concerns about other trees nearby, that is the moment for an assessment rather than a chainsaw.

None of this is legal advice, and genuine disputes belong with a solicitor. What we can do is the part that decides most cases before they start, an honest, recorded assessment of what your trees are actually like. We provide proportionate tree risk assessments across Northern Ireland and Ireland, and we carry out no tree works, so the advice has nothing to sell. Send us the site details and you will get a straight answer.