Encroachment in Canadian property law refers to a situation where a structure, building, or other permanent improvement physically crosses from one property onto an adjacent property without the permission of the owner whose land is being occupied. Unlike easements, which typically involve rights of passage or use, encroachments involve the actual presence of a physical object or structure on land belonging to someone else. The legal significance of this concept stems from one of the most fundamental principles in property law: the right of an owner to exclusive possession and use of their land. When a fence, wall, building foundation, eaves, roof overhang, garage, shed, or even tree roots extend beyond a property boundary, the owner of the encroaching structure may be liable for trespass, and the affected neighbour may have rights to seek remedies ranging from removal of the structure to monetary compensation.
The origins of encroachment law in Canada derive from common law principles of trespass that were inherited from English law and have been adapted through provincial legislation and judicial interpretation over centuries. In Quebec, the concept is governed by the Civil Code of Quebec, which provides a distinct framework rooted in civil law tradition rather than common law. Across common law provinces such as British Columbia, Alberta, Saskatchewan, Ontario, and others, the principles are largely similar, though the specific statutory provisions and procedural mechanisms can vary. What remains consistent across all Canadian jurisdictions is the recognition that property boundaries must be respected and that those who build structures that cross those boundaries face potential legal consequences. Understanding these principles is essential for any business owner, non-profit operator, or professional who owns or leases commercial property, as the financial and operational implications of encroachment disputes can be substantial.
The practical reality of encroachments is that they are remarkably common, often arising not from intentional wrongdoing but from honest mistakes or longstanding historical conditions. Property surveys conducted decades ago may have contained errors, or original surveys may never have been properly marked on the ground. Buildings constructed fifty or sixty years ago may have been built according to informal boundaries that neighbours agreed upon without formal survey work. Over time, as properties change hands, these informal arrangements are forgotten, and a new owner conducting a fresh survey discovers that the garage they assumed was entirely on their property actually sits partly on the neighbour's land. Similarly, fences are frequently installed along assumed boundaries that turn out to be inaccurate, and additions to buildings may inadvertently cross property lines when builders work from outdated or imprecise plans. For business owners who acquire commercial property, whether for a retail location, warehouse, manufacturing facility, or office space, discovering an encroachment after purchase can create significant complications affecting everything from insurance coverage to future development plans to relationships with neighbouring property owners.
The legal framework governing encroachments operates differently depending on the jurisdiction and whether the encroachment is minor or substantial. In most common law provinces, encroachment constitutes a form of trespass, which is actionable regardless of whether the affected landowner has suffered measurable damages. The affected neighbour has several potential remedies available. They may seek an order requiring removal of the encroaching structure, claim damages for the diminished value or use of their property, or in some circumstances negotiate an easement or land transfer arrangement that regularizes the situation. Courts in common law provinces exercise discretion in determining the appropriate remedy, and relevant factors typically include whether the encroachment was intentional or innocent, how substantial the intrusion is, how long the encroachment has existed, whether the affected landowner acquiesced to the situation, what hardship removal would cause to the encroaching party, and what harm the continued encroachment causes to the affected landowner. Provincial legislation in some jurisdictions provides specific procedures for dealing with encroachment disputes. For example, the Property Law Act in British Columbia, the Law of Property Act in Alberta, and comparable statutes in other provinces establish frameworks that courts may apply when resolving these disputes, as of the date of authorship.
In Quebec, the Civil Code of Quebec addresses encroachments through specific provisions governing relations between neighbours and the accession of immovables. The civil law approach differs from common law in that it provides a more codified framework that balances the rights of the encroaching party against those of the affected landowner. Under the Civil Code of Quebec, as of the date of authorship, a landowner may generally require the removal of constructions that encroach on their property, but courts may also order alternative remedies such as acquisition of the encroached land by the encroaching party or payment of compensation. The civil law approach places significant emphasis on the good faith or bad faith of the person who constructed the encroaching structure, with different consequences flowing from each situation. An owner who built in good faith, genuinely believing they were building on their own land, may be treated more favourably than one who knew or should have known that they were building across the boundary line. This emphasis on good faith is characteristic of the civilian tradition that underlies Quebec property law and represents a meaningful difference from the common law approach found elsewhere in Canada.
The distinction between different types of encroachments matters considerably in determining both liability and remedies. Surface encroachments, where a building wall, fence, or structure physically occupies the surface of the neighbouring property, are the most straightforward to identify and typically attract the most attention. Subsurface encroachments, involving foundations, footings, or underground infrastructure that extend beneath the boundary line, may be less visible but can be equally problematic, particularly if they interfere with the neighbouring owner's ability to excavate or develop their own property. Aerial encroachments, where eaves, balconies, signs, or upper floors overhang the boundary at height, raise additional considerations because they may not physically touch the neighbouring land but nonetheless occupy the airspace above it. Canadian property law generally recognizes that ownership of land includes the airspace above and the ground below, within reasonable limits, meaning that aerial and subsurface encroachments can give rise to claims even where there is no contact with the surface of the neighbouring property.
Consider a situation involving a non-profit organization operating a community services facility in Saskatoon. The organization had occupied the property for nearly twenty-two years, having purchased the building from a church that had operated there since the early nineteen seventies. The non-profit used the building to provide employment training programs, community meals, and various support services to local residents. When the property immediately to the west changed hands in late 2024, the new owner commissioned a survey as part of their due diligence before developing the site for a small commercial plaza. The survey revealed that the non-profit's building extended approximately forty-three centimetres onto the neighbouring property along the entire length of the building's western wall, a distance of about eighteen metres. Additionally, the survey showed that the non-profit's paved parking area encroached onto the neighbouring property by a more substantial amount, approximately two and a half metres at its widest point, covering roughly ninety square metres of land. The encroachments had apparently existed since the original church building was constructed in 1972, likely due to surveying errors or informal boundary arrangements that were common during that era of development.
The new neighbouring owner approached the non-profit with a demand that the encroachments be resolved before they could proceed with their commercial development. They indicated that the building encroachment would need to be either removed or purchased, and that the parking area encroachment would need to be vacated entirely, as their site plans required the full extent of their property. The costs associated with removing the building encroachment were estimated by a structural engineer at between seventy-five thousand and ninety thousand dollars, as it would require demolishing the western wall and rebuilding it along the correct property line, with associated structural reinforcement, mechanical system relocation, and interior finishing work. The loss of the parking area would reduce the non-profit's available parking from twenty-six spaces to approximately eighteen, which raised concerns about accessibility for clients and compliance with municipal zoning requirements. The organization's leadership was faced with a difficult situation that threatened both their financial stability and their ability to continue serving the community.
This scenario illuminates several critical aspects of encroachment liability that business owners and non-profit operators must understand. First, the fact that an encroachment has existed for decades and was created by a previous owner does not insulate the current owner from liability. When property changes hands, the new owner inherits both the benefits and the burdens associated with that property, including any encroachments that structures on the property may create onto neighbouring land. The non-profit in this example had no involvement in the original construction decisions, yet they bore the legal responsibility for resolving the encroachment. Second, the triggering event for many encroachment disputes is a change in ownership of the affected property, often combined with fresh survey work. Encroachments can persist for decades without incident when neighbours are unaware of them or choose not to raise concerns, but new owners conducting due diligence often discover issues that previous owners overlooked or tolerated. Third, the costs of resolving encroachments can be grossly disproportionate to the value of the land involved. The ninety square metres of parking area encroachment might have a bare land value of only a few thousand dollars, but the cost of vacating that area and losing the parking functionality could be far higher. This disparity creates pressure for negotiated solutions, as litigation benefits neither party when the stakes are modest but the costs of physical remediation are high.
The implications of encroachment liability extend well beyond the immediate costs of remediation. Insurance coverage may be affected, as title insurance policies often contain exclusions for matters that would have been revealed by an accurate survey. If a property owner did not obtain a survey before purchasing, or if the survey contained errors, they may find that their title insurance does not cover losses arising from the encroachment. Lenders may become concerned if an encroachment is discovered on property that secures a mortgage, as the lender's security interest could be affected by a forced removal or by the affected neighbour's claims against the property. Future development plans may be constrained, as obtaining building permits often requires confirmation that proposed construction complies with setback requirements measured from the true property boundaries. If an existing building already encroaches onto neighbouring land, a municipality may be reluctant to issue permits for additions or renovations that would perpetuate or extend the encroachment. For commercial properties that may eventually be sold, unresolved encroachments can complicate transactions, reduce marketability, and affect sale prices.
Protecting against encroachment liability begins long before any dispute arises. Every business owner or non-profit operator who acquires real property should commission a current survey from a licensed land surveyor showing the exact location of all property boundaries and the location of all structures relative to those boundaries. This survey should be compared carefully against the title documents and any existing survey plans to identify discrepancies. If an encroachment is discovered during due diligence before a purchase closes, the buyer has several options: they may negotiate a price reduction to account for the cost of resolving the encroachment, require the seller to resolve the issue before closing, obtain title insurance that specifically covers the encroachment, or negotiate a formal easement or boundary agreement with the affected neighbour. Each option involves tradeoffs, and the appropriate choice depends on the specific circumstances, including the severity of the encroachment, the relationship with the neighbouring owner, and the intended use of the property.
When an encroachment is discovered after a property has already been acquired, the owner should immediately consult with a lawyer who practices in real property law to understand their options and exposure. Documentation is essential: the owner should obtain the survey that identified the encroachment, gather any historical records that shed light on when and how the encroachment arose, and review their title insurance policy to determine whether coverage might be available. If the neighbouring property owner has not yet raised the issue, the property owner must consider whether to proactively disclose the situation and seek a negotiated resolution, or to wait and see whether the neighbour becomes aware of the problem. There are arguments on both sides of this question. Proactive disclosure may facilitate a more cooperative negotiation while also demonstrating good faith. However, it also alerts the neighbour to a claim they might never have discovered or pursued. The appropriate strategy depends on the specific circumstances, and legal advice tailored to the situation is essential.
Negotiated resolutions are generally preferable to litigation for several reasons. Court proceedings are expensive, time-consuming, and unpredictable. Even if an affected landowner has a clear legal right to demand removal of an encroachment, courts retain discretion in fashioning remedies and may decline to order removal where the hardship to the encroaching party would be disproportionate to the benefit to the affected party. Common negotiated solutions include the purchase of the encroached land by the owner of the encroaching structure, which regularizes the situation by shifting the boundary line; the grant of an easement permitting the encroachment to remain, sometimes in exchange for ongoing payments or a one-time fee; and agreements to remove the encroachment at a future date, such as when the encroaching structure reaches the end of its useful life or when the property is redeveloped. Any negotiated resolution should be documented in a written agreement prepared or reviewed by lawyers for both parties and should be registered against title to both properties so that subsequent owners are bound by the arrangement.
Business owners should also be aware of how their own activities might create encroachments on neighbouring properties. Before undertaking any construction, renovation, or improvement project, a property owner should verify the exact location of all property boundaries through a current survey. Building permits typically require setback information, but the accuracy of that information depends on the accuracy of the underlying boundary data. Hiring a land surveyor to stake the boundaries before construction begins, and having the surveyor verify the location of foundations and structures during construction, can prevent costly disputes after the fact. The cost of proper surveying is minimal compared to the expense of resolving an encroachment after a building has been completed. For properties adjacent to other commercial operations, clear communication with neighbouring owners before construction can also help identify potential issues early. A neighbour who is informed about proposed construction and invited to raise any boundary concerns is less likely to become an adversary if a dispute later arises.
Questions that every business owner and non-profit operator should consider in relation to encroachment include the following: Has a current survey been obtained showing all structures in relation to the property boundaries? Do any structures on the property extend onto neighbouring land? Do any structures from neighbouring properties extend onto this property? Are there any fences, parking areas, driveways, or landscaping features that cross boundary lines? Has title insurance been obtained, and does it cover encroachment-related matters? Are there any historical agreements or understandings with neighbours regarding boundaries or shared improvements? What are the implications if an encroachment must be removed, and what would the estimated costs be? Addressing these questions systematically, ideally before a property is acquired and periodically thereafter, represents the most effective protection against the disruption and expense that encroachment disputes can cause. For those who operate businesses or organizations from real property they own, understanding encroachment liability is not merely an academic exercise but an essential component of responsible property stewardship and risk management.