Published 22 September 2026 · By Jatin Dua, Broker of Record, RE/MAX Quantum Realty
A fence does not prove where the property line is; only a survey does. Cost-sharing for a boundary fence is normally by written agreement, some Ontario municipalities use a fence-viewer process, and Toronto sets height rules for front, side and rear yards and pool enclosures.
Fence disagreements are among the most common neighbour disputes, and they usually come down to three questions: where exactly is the boundary, who pays, and what does the by-law allow.
Where is the line?
A fence is not proof of the boundary. The only reliable answer is a survey. If you are buying, a current survey or title insurance matters; if you are building a new fence, confirm the line first. Fences that wander over the line for years can lead to arguments about ownership, which is a question for a lawyer.
Who pays
For a fence on the shared line, neighbours often split the cost by agreement. Put it in writing: cost, design, height, which side faces out, and who maintains it. Some Ontario municipalities also use a fence-viewer process under the Line Fences Act to settle cost-sharing disputes; check whether that applies where you live.
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Height and design rules
Toronto sets fence heights and rules in its municipal code, with different limits for front, side and rear yards and for pool enclosures. A permit isn’t normally required for an ordinary fence, but pool fences have their own requirements. Check before you build, especially on corner lots and near driveways, where sight lines matter.
Trees on the line
A tree on the boundary can belong to both owners, and Toronto’s tree by-law may require a permit to injure or remove a protected tree, even when building a fence. Get advice before cutting roots.
Keeping it civil
Talk first, show the survey, share quotes, and agree in writing. If that fails, a mediator is cheaper than a lawsuit.
The takeaway
Confirm the line with a survey, agree cost and design in writing, check the City’s fence and tree rules, and use a mediator before a lawyer.
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Frequently asked questions
Does the fence mark the property line in Ontario?
No. Only a survey confirms the boundary.
Does my neighbour have to pay half the fence?
Not automatically. It is usually by agreement, and some municipalities offer a fence-viewer process.
How high can a fence be in Toronto?
It depends on the yard and location; check the City’s fence rules before building.
Can I remove a fence on the boundary?
Not without your neighbour’s agreement if it is shared. Talk first and get it in writing.
Sources
- Line Fences Act — the fence-viewer process
- City of Toronto — fences — height and pool enclosure rules
Related reading
- Easements and rights of way in Ontario: what is on your title, and what your neighbour can still claim
- Encroachments and possessory claims under Land Titles: the date that decides everything
- Toronto’s tree by-law: 30 centimetres, and $100,000 per tree
About the author — Jatin Dua, Toronto and GTA real estate broker
I am Jatin Dua, Broker of Record and co-founder of RE/MAX Quantum Realty Inc., Brokerage, Unit 101, 799 The Queensway, Etobicoke. I work with buyers and sellers across Toronto and the GTA, with deep local knowledge of the west end. Four-plus years of active GTA transactions and over $100 million in sales volume. Every market figure here comes from TRREB’s published tables and every rule from RECO or Ontario legislation, so you can check all of it without asking me.
Reach me at connect@jatindua.com or 833-330-1925, or book a call.