Do I need a separate fence between my pool and my neighbour's yard in Ottawa?

Yes, you need a fence that fully encloses your pool on all four sides in Ottawa, including along any shared property line with your neighbour's yard — there is no exemption that allows a neighbouring property's existing fence to substitute for a code-compliant pool barrier unless that fence independently meets every requirement of the Ontario Building Code's pool enclosure standards. This catches many Ottawa homeowners off guard, especially those who assume the 6-foot privacy fence their neighbour installed along the lot line is sufficient.

The Ontario Building Code (OBC), Section 3.10 of Division B, requires that every outdoor residential swimming pool with a water depth exceeding 600 millimetres be enclosed by a barrier on all sides. The barrier must be at least 1.5 metres high, have no openings that permit passage of a 100-millimetre sphere, contain no climbable features (horizontal rails, decorative lattice, or protruding hardware), and include self-closing, self-latching gates with the latch on the pool side at a minimum height of 1.5 metres. The critical point is that this requirement applies to the pool enclosure as a complete system under the pool owner's control — not to fences owned and maintained by adjacent property owners.

A neighbour's fence fails as a pool barrier for several practical and legal reasons. First, you have no legal authority to maintain, modify, or guarantee the ongoing condition of your neighbour's fence. If your neighbour removes their fence, modifies it, or allows it to deteriorate below code requirements, your pool enclosure is immediately non-compliant — and you bear the liability. Second, most residential privacy fences in Ottawa are built with horizontal rails on one side (the neighbour's side, by convention), creating a climbing ladder for children when viewed from the neighbour's direction. A pool enclosure fence must be smooth and unclimbable from both sides. Third, standard privacy fences often have gaps at the bottom (from grade variations, frost heave, or soil erosion) that exceed the 100-millimetre maximum opening, and gates in neighbouring fences almost never have pool-compliant self-closing and self-latching hardware.

If your neighbour's existing fence does happen to meet every OBC pool enclosure requirement — 1.5-metre height, no climbable features from either side, no gaps exceeding 100 millimetres, and compliant gate hardware — you could theoretically rely on it as one side of your enclosure. However, this approach carries significant risk. Ottawa building inspectors will evaluate the fence at the time of inspection, and if anything about the neighbour's fence falls short, you fail. More importantly, you have no legal mechanism to prevent your neighbour from changing their fence in the future. Pool safety law places the duty of care squarely on the pool owner, and "my neighbour took down their fence" is not a defence in a liability claim.

The recommended approach in Ottawa is to install your own pool enclosure fence set back 15 to 30 centimetres from the property line on your own property. This gives you complete control over the barrier's compliance, maintenance, and longevity. Setting it back from the property line avoids encroachment disputes and gives you access to both sides of the fence for maintenance. The setback does reduce your usable pool area slightly, but this is a trivial trade-off compared to the legal and safety implications of relying on someone else's fence.

Cost for adding a pool-compliant fence along a shared property line in Ottawa typically runs $40 to $120 per linear foot installed, depending on the material. For a typical 40-foot run along one side of a backyard, expect to pay:

• Aluminum pool fencing: $50 to $80 per linear foot installed, total $2,000 to $3,200. Lightweight, durable, maintenance-free, and available in styles that complement most Ottawa homes. This is the most popular choice for pool enclosures in Ottawa subdivisions.
• Wrought iron: $80 to $120 per linear foot installed, total $3,200 to $4,800. Heavier and more ornamental, but requires periodic repainting to prevent rust — particularly after Ottawa's salt-heavy winters if the fence is close to a driveway or sidewalk that gets winter maintenance.
• Tempered glass panels: $150 to $300 per linear foot installed, total $6,000 to $12,000. Provides an unobstructed view and a modern aesthetic, but is the most expensive option and requires regular cleaning to maintain transparency.
• Removable mesh safety fencing: $25 to $40 per linear foot installed, total $1,000 to $1,600. The most affordable option and easy to remove for winter, though it has a more utilitarian appearance.

Before installing a fence along the shared property line, Ottawa's fencing bylaw (By-law No. 2003-462) requires that you keep the fence entirely on your own property unless you have a written agreement with your neighbour to share the fence as a boundary fence. Even if your neighbour is enthusiastic about you installing a pool fence along the lot line, get the agreement in writing — verbal agreements about fences are a leading source of neighbour disputes in Ottawa, and the pool owner is the one who faces regulatory consequences if the arrangement falls apart.

Talking to Your Neighbour About Pool Fencing

Many Ottawa pool owners find it helpful to have a straightforward conversation with adjacent neighbours before installing pool-side fencing. Explain that you are legally required to fully enclose your pool, that you will be installing a fence on your side of the property line, and that the fence will face the finished side toward their property (Ottawa convention and bylaw requirement). Most neighbours appreciate being informed in advance, and some may offer to share costs if the new fence replaces an aging boundary fence — though any cost-sharing should be documented in writing.

Planning a pool installation or upgrading your pool's fencing? Ottawa Pool Installation connects homeowners with local pool fence contractors who understand the City's requirements and can design an enclosure that keeps your family safe and your property in full compliance.