Selling Land That Was Illegally Severed in Ontario: What Happens

You go to sell, and your lawyer’s title search turns up a problem: the parcel you own was created by splitting a larger property years ago, and there’s no record of the municipal consent the Planning Act requires for that kind of split. Now what?

An "illegal severance" doesn’t necessarily mean the property is unsellable — but it does mean the issue has to be identified and addressed, and that almost always affects your timeline. This is a genuinely common trap in cottage properties, older rural lots, and any parcel that has a complicated ownership history.

This article explains what triggers the problem, how it tends to surface, and the practical consequences for a seller.

What "Illegal Severance" Means Under the Planning Act

Ontario’s Planning Act, s. 50, restricts conveying, mortgaging, or leasing part of a landholding without the required municipal consent or an applicable exemption — a rule commonly known as subdivision control, or "part-lot control." A parcel created by splitting off part of a larger property, without the consent the Act requires, is generally what people mean by an "illegal severance."

This rule applies regardless of how the split happened or how long ago — a decades-old transaction that never obtained the required consent doesn’t fix itself with time.

How It Surfaces During a Sale

Most owners have no idea their property has this history until a lawyer’s title and parcel register search, or a survey, flags a mismatch — the registered legal description doesn’t line up cleanly with how the property was actually conveyed, or there’s a conveyance on record with no accompanying consent. Sometimes a municipality flags it during a permit or severance application instead.

Because this is a frequent trap specifically in severances, cottage properties, and multi-lot transactions, it’s worth raising directly with your lawyer at the start of a sale rather than waiting to see if it comes up.

The Practical Consequences for a Seller

• [ ] Financing difficulty — lenders may be reluctant to mortgage or refinance a property with an unresolved severance problem.
• [ ] Title insurance difficulty — insurers may decline coverage or add exclusions related to the issue.
• [ ] Marketable title questions — a conveyance made contrary to the Planning Act’s consent requirements can affect the enforceability of the transaction that originally created the parcel.
• [ ] Closing delays — resolving the underlying issue takes real time, so it should be treated as a scheduling risk from the outset, not a last-minute paperwork item.

Fixing the Problem Before Closing

Common routes to resolving an unauthorized severance include applying to the relevant municipal consent-granting authority for retroactive or curative approval, or consolidating the affected parcel back with adjoining land so the split no longer exists as a standalone issue. The specific process, and which municipal body handles it, varies by municipality — this article won’t generalize a single fixed path or quote a typical timeline, because both depend heavily on your specific municipality and situation.

Working with your lawyer, and often a land use planning consultant, early is the difference between a manageable delay and a deal that falls apart.

What This Means for Your Timeline and Price

Resolving the issue before you list generally produces a cleaner sale, more buyer confidence, and a smoother financing process for your buyer than trying to sell first and fix it during a conditional period. Either way, if you know about the issue, disclosing it is important — a seller who knows about an unresolved severance problem and doesn’t disclose it takes on real legal risk of their own.

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