Who is responsible for water damage during a condo bathroom renovation in BC—owner or strata?

In most cases, the unit owner who initiated the bathroom renovation is responsible for water damage that occurs during the renovation — both damage within their own unit and damage to common property or neighbouring units caused by the renovation work. This is one of the most important liability issues in condo bathroom renovations across Metro Vancouver, and understanding the responsibility framework before your renovation begins can save you from financially devastating surprises.

The BC Strata Property Act and your strata corporation's bylaws together establish the liability framework. Under Section 158 of the Strata Property Act, an owner is responsible for repairing and maintaining their strata lot, and this responsibility extends to ensuring that any work performed within the strata lot does not cause damage to common property or other strata lots. When you authorize a bathroom renovation, you are taking responsibility for the work performed by your contractor within your unit — including any damage that results from that work.

The most common water damage scenario during a condo bathroom renovation is a plumbing failure or waterproofing breach that sends water into the unit below. This can happen when a plumber disconnects old supply lines and a valve does not shut off completely, when a drain connection fails during or shortly after rough-in work, when a shower pan or waterproofing membrane is improperly installed and water leaks through the floor during testing or first use, or when an existing pipe is accidentally damaged during demolition. In all of these scenarios, the renovating owner typically bears responsibility.

Here is how the financial liability typically flows in Metro Vancouver strata buildings. Your contractor's commercial general liability insurance should be the first line of defence. If the water damage was caused by the contractor's work (which it almost always is during a renovation), the contractor's CGL policy should cover the cost of repairing damage to common property and neighbouring units. This is exactly why strata corporations require proof of contractor insurance with a minimum of $2 million in coverage before approving renovation work. However — and this is critical — if your contractor's insurance is inadequate, lapsed, or if the contractor disputes responsibility, the claim may fall to you as the unit owner.

The strata corporation's master insurance policy covers common property and the building structure, but most strata insurance policies include a deductible of $10,000 to $100,000 or more for water damage claims. Under many Metro Vancouver strata bylaws, if a water damage claim is triggered by a specific unit owner's renovation, the strata corporation can charge the insurance deductible back to that owner through a chargeback bylaw (sometimes called a deductible recovery bylaw). On a building with a $50,000 water damage deductible, this means the renovating unit owner could be responsible for $50,000 before the strata's insurance even begins to pay — on top of any damage within their own unit that their personal unit owner's policy covers.

Your personal unit owner's insurance plays a critical role here. Loss assessment coverage in your unit owner's policy can help cover a deductible chargeback from the strata corporation. Betterments and improvements coverage pays to repair damage to your own renovated bathroom. Personal liability coverage responds if you are found personally liable for damage to another owner's unit. Without adequate unit owner's insurance, a water damage incident during your renovation could cost you tens of thousands of dollars out of pocket.

The strata corporation's responsibility is generally limited to maintaining common property infrastructure — the building's main plumbing stacks, common drain lines, and structural elements. If water damage during your renovation is caused by a failure of common property that was not related to your renovation work (for example, a main drain stack that fails coincidentally during your renovation), that would be the strata's responsibility under their maintenance obligations.

To protect yourself, ensure your contractor carries adequate CGL insurance ($2 million minimum, $5 million preferred) naming the strata as additional insured. Verify WorkSafeBC coverage. Review your unit owner's policy and ensure you have adequate loss assessment coverage — strata insurance experts in Metro Vancouver typically recommend at least $100,000. Have your contractor perform a water shut-off test before beginning any plumbing work to confirm that supply valves actually close fully. Require a 24-hour flood test of the shower pan before tiling to catch any waterproofing failures before they cause damage to the unit below. And ensure all plumbing work is performed by a licensed plumber and inspected by the municipal building inspector before being closed up.

Water damage from a condo bathroom renovation can easily reach $50,000 to $200,000 when you factor in damage to multiple units, common property, remediation, and the strata's insurance deductible. Proper insurance and professional workmanship are not optional — they are your financial protection.