- Adverse possession needs open, notorious, constant, continuous and peaceful possession, an intention to exclude the true owner, and effective exclusion for the entire ten-year period.
- Registered land is generally protected: the Land Titles Act bars acquiring title by length of possession, unless the ten years ran before the land was registered.
- If the neighbour allowed you to use the strip, the claim generally fails because the possession was not adverse.
- Which system your land is in, and when the ten years ran, are questions a lawyer can confirm through a title search.
Maybe you have mowed, gardened or fenced a strip along your boundary for years, and it has started to feel like yours. You may be wondering whether enough time has passed that the law now treats it as yours.
Adverse possession is one of the hardest ways to gain land. It depends on strict requirements, on how the land is registered, and on whether your neighbour ever allowed your use. This article explains the general picture so you know what questions to ask.
What adverse possession means in plain words
Adverse possession is a claim that a person who has occupied someone else's land in a particular way, for long enough, can end up with the legal right to it. The idea is that an owner who does nothing for a very long time can lose the right to challenge the occupier.
In Ontario, the Court of Appeal has described what a claimant must show: open, notorious, constant, continuous and peaceful possession, an intention to exclude the true owner, and effective exclusion of the true owner for the entire ten-year period under s. 4 of the Real Property Limitations Act.
In everyday terms, that means your use must be visible, not hidden. It must be steady rather than occasional. It must be treated as your own, with the owner effectively kept out, and it must continue without a break for the full period.
Land Titles and Registry land are treated differently
The biggest hurdle for many people is how the land is registered. Section 51(1) of the Land Titles Act bars acquiring title to registered land by length of possession. Adverse possession is possible only if the ten-year period ran before the land was registered, because s. 51(2) preserves claims that had already matured.
The Court of Appeal considered a claim where the land was already registered, and the claim failed for that reason. So the first question is not how long you have used the strip, but which system your neighbour's land is in and when it was registered.
| Question | If the land is registered under Land Titles | If the land is not registered under Land Titles |
|---|---|---|
| Can possession alone give you title? | Generally barred by s. 51(1) of the Land Titles Act. | The common-law requirements and the ten-year period may be relevant. |
| Is there any exception? | Yes, if the ten years ran before registration. | Not applicable in the same way, but you must still prove every requirement. |
| Who can confirm the system? | A lawyer, through a title search. | A lawyer, through a title search. |
Whether a particular property sits in one system or the other, and the date it moved, are matters of record that a lawyer can check. Do not assume based on how old the neighbourhood is.
Permission can end the claim
Even where the timing works, the occupation must be adverse. Where the owners permitted the occupation, the element of adversity cannot be met.
This matters in friendly neighbour situations. If a neighbour once said it was fine to keep your shed or garden on the strip, or simply told you to go ahead, that may be treated as permission. Your own messages, letters and memories of conversations can become important evidence either way.
Questions to ask yourself before relying on a claim
- Has my use been visible and continuous for the entire ten years, with no gaps?
- Did I treat the strip as mine and effectively keep the owner out?
- Did any owner ever say, or imply, that I could use it?
- Is the neighbour's land registered under Land Titles, and when did that happen?
- Do I have photos, receipts, surveys or witnesses that show what I did and when?
If you answer no or unsure to several of these, a claim may be difficult. It is also worth knowing that a claim like this is usually decided on the facts of each property, so general rules only go so far.
Fences and boundary disputes are a separate path
Many people raise adverse possession when the real issue is a fence or an unclear boundary. The Line Fences Act process does not decide where the boundary is. It also does not apply where one owner has already built or repaired a fence alone and wants the neighbour to share the cost.
If you are unsure where the boundary actually runs, a survey is often the practical starting point. Knowing the true line may show that you are not on the neighbour's land at all, or that the strip is smaller than you thought.
What to do next
- Write down when you started using the strip and what you did there.
- Collect dated photos, receipts and any messages with the neighbour.
- Avoid asking the neighbour for permission before you understand the consequences, since permission can defeat a claim.
- Ask a lawyer to confirm which land registration system applies and whether the timing could work.
- Consider a current survey to confirm where the boundary is.
Because these claims are so fact-specific, speaking with a lawyer before you act, build, sell or buy is usually sensible.
Frequently asked questions
How long do I need to use a neighbour's land for adverse possession in Ontario?
The Court of Appeal has described an entire ten-year period under s. 4 of the Real Property Limitations Act. The possession must also meet the other requirements, such as being open, continuous and peaceful, and excluding the true owner. Time alone is not enough.
Can I claim adverse possession if the land is registered?
Generally not. The Land Titles Act bars acquiring title to registered land by length of possession. The exception is where the ten years ran before the land was registered.
What if my neighbour let me use the strip?
Permission defeats the claim, because the adversity element cannot be met where the owners permitted the occupation. Be careful about what has been said between you and your neighbour.
Does the Line Fences Act decide who owns the strip?
No. The Line Fences Act process does not decide where the boundary is. A survey and legal advice are better routes for ownership questions.
Sources
- Ontario.ca – Line Fences Act — ontario.ca
- Billimoria v. Mistry, 2022 ONCA 276, para 27 — ontariocourts.ca
Links go to official government, court and regulator pages. The law changes — confirm you are reading the current version.
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