Blanket Mortgages in Ontario: Financing Multiple Properties Under One Charge

If you own several rental properties, a small development site split across adjoining lots, or a cluster of investment units, you may have come across the idea of financing them all under a single loan rather than juggling separate mortgages for each address. That structure is called a blanket mortgage, and it can simplify your lending relationship — but it also changes what happens the day you want to sell or refinance just one of the properties involved.

This article explains how a blanket mortgage works in Ontario, why lenders and borrowers use them, and the mechanics of carving a single property out of one later on.

What Is a Blanket Mortgage?

A blanket mortgage is a single mortgage (registered as a charge against title) that secures more than one property at once, in favour of the same lender. Instead of registering a separate charge against each parcel, the lender registers one loan against title to all of the properties named in the mortgage.

The properties don't need to be identical in type — a blanket mortgage can cover several rental houses, a mix of vacant lots and built units, or commercial and residential parcels together, depending on what the lender agrees to accept as collateral.

How This Differs From Financing Each Property Separately

With separate mortgages, each property has its own charge, its own balance, and its own path to discharge. Paying off or selling one property doesn't touch the others.

Under a blanket mortgage, all of the properties stand behind the same debt. If you default, the lender's security spans everything named in the charge — not just the property tied to whatever went wrong. That trade-off is the core thing to understand before agreeing to this structure: convenience and often more favourable overall lending terms, in exchange for cross-linked exposure across your portfolio.

The Partial Discharge (Release) Clause

Because a blanket mortgage covers multiple properties, it needs a mechanism for releasing individual parcels without paying off the entire loan. This is usually built into the mortgage as a partial discharge clause (sometimes called a partial release clause).

A partial discharge clause typically sets out:

• How much of the outstanding balance must be paid down (or allocated) to release a specific property from the blanket charge
• Any conditions the lender attaches to a partial release, such as maintaining a minimum loan-to-value ratio across the remaining properties
• Whether the lender's consent is required in addition to the payment, or whether the release is automatic once the formula is satisfied

Not every blanket mortgage includes a partial discharge clause. If yours doesn't, releasing one property may require negotiating an amendment with the lender, or paying out the loan in full — a very different (and often more expensive and time-consuming) proposition than a straightforward release.

Selling or Refinancing Just One Property

If you're planning to sell or refinance one property secured under a blanket mortgage, the practical steps generally look like this:

1. Review the mortgage document (and any standard charge terms it incorporates) to confirm whether a partial discharge mechanism exists and what it requires.
2. Contact the lender early — well before you list the property or firm up a sale — to confirm the current payout or paydown figure needed to release that specific parcel.
3. Have your lawyer confirm the release mechanics on title, including whether the lender will register a partial discharge against just that property while leaving the blanket charge intact against the rest.
4. Coordinate timing with your closing date so the discharge is registered without delaying the transaction.
5. Confirm the impact on your remaining properties, since removing one parcel from the pool of security may change the loan-to-value math the lender applies to what's left.

Skipping the early lender conversation is the most common way this process goes sideways — a seller who assumes a partial discharge is routine can be surprised late in a transaction by a lender that wants a larger paydown, additional security, or its consent as a separate step.

Who Typically Uses Blanket Mortgages

Blanket mortgages tend to show up with:

• Real estate investors consolidating financing across a rental portfolio
• Developers holding several adjoining or nearby lots ahead of severance or phased construction
• Business owners whose company holds multiple commercial or mixed-use properties

They're less common in ordinary residential resale transactions, where each home is typically financed on its own.

Risks to Weigh Before Signing

A blanket mortgage isn't inherently risky, but it does concentrate exposure. Before agreeing to one, consider asking your lawyer to review:

• Whether a partial discharge clause exists, and how workable its terms are
• What happens to the remaining properties' loan-to-value ratio if one is released
• Whether the lender can accelerate the whole loan based on a default tied to just one property in the group
• How the structure interacts with any existing separate mortgages already registered against individual properties in the pool

Frequently asked questions