Can a neighbour's encroaching fence become their property over time?

In most of Canada, a neighbour’s fence encroaching on your property generally cannot become their land through adverse possession — because adverse possession has been abolished in all common law provinces except Nova Scotia and Prince Edward Island.

Yes, under California law, a neighbor’s fence encroaching on your property can become theirs through adverse possession — but only if they openly, continuously, and exclusively use the land for at least 5 years and pay property taxes on it.

Yes, under New York law, your neighbor’s fence on your property could become theirs through adverse possession — but only if they openly, continuously, and exclusively use the land for at least 10 years, with intent to claim it as their own.