The cover comes off, the water clears up, and for a few months your backyard becomes the best room in the house. What most Ottawa pool owners never think about is that the moment the pool holds water, three separate sets of rules start applying to them at once. The City has a by-law with real fines behind it. Their home insurance policy has conditions they may never have read. And Ontario law makes them responsible, in certain situations, for people they never invited onto the property. Children most of all.
This page walks through all three layers in plain language: what the Pool Enclosure By-law actually requires, how a pool changes your home insurance, and who answers for it when someone gets hurt. We wrote it because at MG Law we see what these situations look like after the fact, when a gate was left open or a policy detail surfaces for the first time during a claim.
If you own a pool, this is the version of the rules worth reading before anything goes wrong.
Key Takeaways
- Ottawa’s Pool Enclosure By-law requires a permit and a locked 1.5 metre enclosure around any pool holding 600 mm of water.
- Every gate must stay closed and locked whenever the pool is not in use, even on enclosures built decades ago.
- Non-compliance carries fines of $500 to $100,000, plus daily penalties if an owner ignores a City compliance order.
- A pool you never disclosed can give your home insurer grounds to dispute an injury claim as a material change in risk.
- Under Ontario’s Occupiers’ Liability Act, a pool owner can be liable to a young child who wanders in uninvited.
- Run through the compliance checklist below, call your insurance broker, and contact MG Law if someone has been seriously hurt.
What does Ottawa’s Pool Enclosure By-law actually require?
The short answer: a permit before you build, and a fence built and operated to a specific standard, with one stated goal written right into the City’s own guidance. The enclosure must make the pool inaccessible to small children. That purpose shapes every rule that follows, and it covers far more backyards than people assume.
The full rules live in Pool Enclosure By-law No. 2013-39. Here is what matters in practice.
Which pools, hot tubs and ponds are covered (the 600 mm rule)
The by-law applies to any privately owned outdoor pool of water capable of holding a depth of 600 millimetres, which is 24 inches, at any point. The water can be for swimming, bathing, wading or just reflecting. That wording captures the obvious in-ground pool, but it also captures inflatable pools from the hardware store, self-inflating pools, backyard ponds, and hot tubs. The hot tub counts even if its lid locks.
So a cheap summer pool can fall under the same by-law as a custom in-ground installation. The few exceptions are narrow: water for livestock or crop irrigation on farmland, stormwater management ponds, and pools the City itself owns.
The permit: when you need one and what it costs
Construction cannot legally start until the Chief Building Official issues a permit. This applies to new pools, and it applies to enclosures themselves, including replacement fences. A common surprise: your yard already having a fence does not exempt you. You still apply, because the City needs to confirm that the existing fence meets the enclosure standard.
There is one narrow exception. A pool that was dismantled and is being rebuilt in the same spot, the same way, under a previously issued permit, does not need a new one.
A few administrative details worth knowing. The permit fee is $257 under the City’s fee schedule in effect since January 1, 2026 (fees change from year to year, so confirm the current amount when you apply). An application sits open for six months, and after that it is treated as abandoned and the fee is lost. Once a permit is issued, construction has to begin within 18 months or the permit can be revoked.
Fence height, gaps and gates: the specifications that matter
Many articles online tell Ottawa homeowners that a 4-foot fence is enough. That figure belongs to other cities. Ottawa requires a minimum height of 1.5 metres, which is roughly 5 feet. Build to the lower number and you will fail inspection.
The other core specifications, translated from the by-law:
- No opening anywhere through or under the enclosure can let a 100 mm sphere pass. That is roughly the size of a softball.
- The fence must sit at least 1 metre back from the inside edge of the pool water.
- Nothing climbable can be fixed to the outside face of the fence between 140 mm and 900 mm from the bottom, and you cannot pile equipment, firewood or anything else against it that would give a child a leg up.
- A hedge or a row of bushes does not count as an enclosure. Neither does an overhead garage door. Barbed or sharp materials are prohibited, and the fence cannot carry electricity.
Gates carry their own standard. Every gate must close on its own, latch on its own, and have a lock. The latching device sits at least 1.35 metres above the bottom of the enclosure, on the inside, where a toddler cannot reach it. With a double gate, one side gets pinned to the ground and the other meets the full standard.
The by-law also sets construction details for chain link, wood, wrought iron, aluminum and vinyl fencing, down to post spacing and mesh size. Those specifics matter to your contractor more than to you, and the full text is linked at the bottom of this page.
The rule that applies to every pool in Ottawa, even ones built decades ago
Older enclosures built legally under previous by-laws are generally grandfathered for their construction standards. Two sections of the current by-law, though, apply to every pool in the city no matter when it was built.
Section 23 requires every gate to be closed and locked at all times, except when the pool area is actually in use. Section 24 goes further for gates that open onto public spaces such as a park, a golf course or a road: those stay closed and locked except during the moment someone is passing through.
Read that again, because it changes what compliance means. Your obligations did not end the day the inspector signed off. A perfectly built fence with the gate propped open for the pool guy is a by-law contravention that afternoon. It is also the kind of detail lawsuits turn on. Fences rarely fail. Habits do.
Don’t fill it yet: inspections and temporary fencing
Putting water in the pool before the enclosure passes inspection is itself a violation. The by-law requires two inspections: one before any water goes in, and one when the enclosure is fully complete.
During construction, a temporary enclosure is allowed, and it has its own standard: 1.5 metres high, continuous, structurally sound, non-climbable in that same 140 to 900 mm zone, locked when not in use, with no gap passing a 100 mm sphere. The temporary fence must be inspected before filling, and the permanent enclosure has to be finished within 14 days after the pool is filled unless the Chief Building Official grants a written extension.
Hot tubs: when a locked cover replaces a fence
A hot tub needs an enclosure like any other pool, with one alternative. A safety cover counts as the enclosure if it can support a 90 kilogram load (or meets the ASTM F1346 standard) and is permanently attached to the tub or its base.
The catch mirrors the gate rule. The cover must be fastened and locked every time the tub is not in use. An unlocked cover on an unattended hot tub puts you offside the by-law, with the deck door wide open behind it.
What non-compliance can cost you
City officers can enter a property at reasonable times to inspect. Where they find a contravention, they can order the work corrected, and they can order the pool emptied immediately. Ignore an order and the City can do the work itself, bill you with a 15 percent administration fee on top, and collect through your property taxes if you don’t pay.
Prosecution is also on the table. Conviction carries a fine between $500 and $100,000. Failing to comply with an order is treated as a continuing offence, which means a separate fine of $500 to $10,000 for each day it continues, and those daily fines have no overall cap.
Maximums like these exist for the worst cases, and most owners who fix a problem when asked will never see them. They are worth knowing anyway, because they show how seriously the City treats unsecured water, and a civil court hearing an injury case will treat it no less seriously.
How does a backyard pool affect your home insurance in Ontario?
A pool changes your policy on both sides. It adds something valuable that needs protecting, and it adds a risk your insurer priced without knowing about. The single most important step is also the simplest one: tell them.
Why you must tell your insurer about the pool
Ontario property policies operate under statutory conditions, and one of them deals with what the law calls a material change in risk. In plain terms, that means a change significant enough that the insurer would have charged more, or declined the risk, had it known. The condition requires you to give prompt written notice of any such change within your control and knowledge. A new pool fits that description comfortably.
Where an owner stays silent and a loss happens, the insurer can argue the policy is void on that point. Courts do hold insurers to a real burden here. The company has to prove the change was material, that you knew about it, and that you failed to give notice, and judges have relieved homeowners from forfeiture in deserving cases. But that is a fight you have after the loss, with everything riding on it. A phone call before the excavator arrives avoids the fight entirely. The same applies when you buy a home that already has a pool: confirm coverage before closing, not after.
What’s typically covered, and what usually isn’t
Policies differ, so treat this as orientation rather than gospel. In-ground pools usually fall under the detached or other structures portion of a homeowner policy, which often carries its own sub-limit. Above-ground pools are sometimes classified as personal property instead. Sudden events like a fallen tree or storm damage are commonly covered. Gradual problems are not: wear, ground movement, and damage from a botched winterization tend to land on the owner.
Premiums generally rise with a pool. Canadian brokerages cite increases in the range of 10 to 30 percent depending on the pool and the insurer, and that range is an industry estimate, nothing more. Ask your own broker what your numbers look like.
The liability portion: the coverage that matters most
The property coverage protects the pool. The liability coverage protects you. If a guest is seriously hurt in your backyard, this is the part of the policy that responds to the claim, and it is the part where the stakes get large quickly. Drowning and spinal injuries produce some of the biggest awards in Canadian personal injury law, and a standard $1 million limit can prove thin against a lifetime of care costs. Brokers commonly recommend pool owners carry $2 million or more, sometimes through an umbrella policy.
Two things can complicate that protection. The first is by-law compliance. Insurers expect pools to meet local safety requirements, and an enclosure that falls short of By-law 2013-39 hands the company an argument when a claim arrives. The second is renting the pool out through platforms like Swimply. Revenue use of your property raises separate exclusion issues, and platform protection plans come with long lists of exceptions. If money changes hands for pool time, your insurer needs to know first.
Who is liable if a child wanders into your pool? (It’s not “attractive nuisance” in Ontario)
If you searched that phrase, here is a correction most articles miss. Attractive nuisance is an American legal doctrine. Ontario never adopted it, and you will not find it in a Canadian courtroom. What Ontario has instead is a statute, the Occupiers’ Liability Act, and on the question of children it arrives at a similarly demanding place by a different road.
“Attractive nuisance” is an American doctrine. Here’s what Ontario uses instead
Decades ago, Canadian common law sorted visitors into categories and applied a doctrine called allurement to children drawn onto land by something tempting. The Occupiers’ Liability Act swept all of that away. Section 2 of the Act states that it applies in place of the old common law rules. One statute now governs an occupier’s responsibility to everyone who comes onto the property.
The word occupier is broader than owner. It includes anyone in physical possession of the premises, and anyone with responsibility for and control over their condition, the activities on them, or who gets in. A landlord and a tenant can both be occupiers of the same backyard at the same time. So can a property manager.
The duty you owe to everyone on your property
Section 3(1) sets the baseline. An occupier must take such care as is reasonable in all the circumstances to see that people entering the premises are reasonably safe while there. The duty covers the condition of the property and the activities carried on it.
Around a pool, that standard touches everything this article has already described. The state of the fence. The habit of locking the gate. The slippery deck nobody resurfaced. The party where children swam while the adults talked. The law does not demand perfection from a homeowner, only the care a reasonable person would take around water that can kill.
What about trespassers, and why young children are different
Section 4 of the Act lowers the duty for a person who willingly assumes the risks of entering. Toward that person, an occupier only has to avoid deliberately creating a danger and avoid reckless disregard for their presence. People who enter to commit a crime, or who enter where the Trespass to Property Act prohibits it, are deemed to have assumed the risks.
The phrase doing the heavy lifting there is willingly assumed, and the Supreme Court of Canada read it strictly in Waldick v. Malcolm. Assuming a risk means genuinely understanding it and genuinely accepting it, the legal risk included. Now apply that to a four-year-old who slipped through a gap in a fence. A child that age cannot understand what deep water means, let alone accept it. The reduced duty in section 4 has almost no room to operate, which pushes the analysis back onto the question of what the occupier did to keep children out.
That is where the by-law re-enters the picture. By-law 2013-39 exists, in the City’s own words, to make pools inaccessible to small children. An owner with no permit, a low fence or an unlocked gate has fallen short of a safety standard written for precisely this danger. Breaching a by-law does not decide a lawsuit on its own, but as evidence that an owner failed to take reasonable care, it carries serious weight. The blunt version: yes, you can be held responsible for a child you never invited.
Beyond drowning: the other pool injuries that lead to claims
Drowning dominates the headlines, but it is not the only way a backyard pool produces a serious claim. Diving into shallow water causes catastrophic spinal cord injuries every summer. Wet decks and slick stairs cause falls. Drains and equipment can entrap swimmers. Aging pool electrical work creates shock hazards. And a host who serves alcohol at a pool party takes on responsibilities of their own when an impaired guest goes in the water. Each of these gets measured against the same section 3 standard of reasonable care.
Why this matters: what the drowning data shows
The law described above can feel heavy for a backyard. The numbers explain why it is built that way.
Across Canada, backyard pools are the most common place where children under five drown, ahead of lakes, rivers and bathtubs. Lifesaving Society research shows that in the overwhelming majority of drownings in this age group, the child was unsupervised or the supervising adult was distracted, often during only a momentary lapse of attention. National drowning data has also found that in about half of private pool deaths where the information was available, the property either had no gate or had one that did not self-close and self-latch. Those are the two failures the Ottawa by-law targets most directly.
Ontario’s Chief Coroner recorded 75 drowning deaths in the province in 2024, down from 94 the year before. Behind the fatalities sit hundreds of non-fatal drownings each year that end in emergency rooms, some with lasting brain injury.
One more fact belongs in every pool owner’s head. Drowning is fast and it is silent. There is rarely splashing or yelling. A child can go under in the time it takes to answer a text, in water as shallow as a few centimetres. The fence, the lock and the statute all exist because of that silence.
A pool owner’s quick compliance checklist
Everything above, condensed to what you actually do:
- Get the permit before construction starts, even if your yard is already fenced.
- Keep the pool empty until the enclosure passes inspection.
- Build to 1.5 metres minimum, with no gap a 100 mm sphere could pass and nothing climbable on the outside face.
- Keep every gate self-closing, self-latching, and locked whenever the pool area is not in use. Make this a household rule.
- Lock the hot tub cover every time you get out.
- Store furniture, ladders and equipment away from the fence line.
- Tell your insurer about the pool in writing, and ask if your liability limit fits the risk.
- During gatherings, give one adult the single job of watching the water.
Most of this list costs little. What it protects against fills the rest of this page.
If your child or family member was injured in someone else’s pool
Some readers arrive here from the other side of these rules, after something terrible has already happened. A few points of law are worth knowing quietly, without any pressure attached.
A claim can exist even if your child entered a pool without permission. Ontario law does not treat a young child like an adult trespasser, for the reasons explained above, and the owner’s precautions, or the absence of them, sit at the centre of the case.
Time limits work differently for children. The basic limitation period in Ontario is two years from when a claim is discovered, but under the Limitations Act that clock generally does not run while the injured person is a minor without a litigation guardian. Families who assume they are too late often are not.
The injured person is also not the only one the law recognizes. Under section 61 of the Family Law Act, spouses, children, parents, grandparents and siblings can bring their own claims for what the injury or death took from them, including the loss of care, guidance and companionship. Ontario’s Court of Appeal has confirmed there is no fixed cap on those awards.
Every one of these points depends on the facts of the specific case. They are reasons to ask questions, and to ask them early.
Talk to MG Law about a pool-related injury
Three layers of rules, one purpose underneath them: keeping people away from water that can kill quietly, and deciding who answers when the safeguards fail. If you own a pool, the by-law checklist and a call to your insurance broker will cover most of what this page describes.
If someone in your family was seriously hurt in or around a pool, the questions get harder, and the answers depend on details you should not have to sort through alone. MG Law’s Ottawa team can review what happened, explain your options in plain language, and deal with the insurers while your family focuses on recovery. The consultation is free. Speak with our team about your situation, and get clear answers on what comes next.
About the author
Egor Evsikov, C.D., M.A., J.D., is an Associate and Personal Injury Lawyer at MG Law in Ottawa. A former Military Intelligence Analyst, he served fourteen years with the Canadian Armed Forces, including postings with Canadian Special Operations Forces Command and Allied Joint Force Command Naples, before completing his legal studies at the University of Ottawa in 2021. His practice focuses on motor vehicle accidents and slip, trip, and fall claims, including occupiers’ liability cases like those discussed in this article. He is fluent in English and Russian and is a member of the Ontario Trial Lawyers Association, the County of Carleton Law Association, and the Canadian Military Intelligence Association.
Disclaimer:
This article provides general information about Ontario law and City of Ottawa requirements as of the publication date. It is not legal advice. By-law requirements, fees and insurance conditions change, and every case depends on its own facts. For advice about your situation, speak with a lawyer.
References
- Lifesaving Society Canada (drowning reports); Parachute Canada, Drowning; Ottawa Public Health, Water Safety Toolkit (PDF); Office of the Chief Coroner (Ontario) drowning totals as publicly reported
