What Is an Assignment Sale and How Does the Mortgage Work in Canada? (2026)

Assignment sales are one of the most misunderstood corners of the Canadian housing market. You're not buying a house — you're buying someone's contract to buy a house that isn't finished yet. That changes how the deal is structured, how it's taxed, and which lenders will touch it. In 2026, with builders and original buyers both trying to manage long pre-construction timelines, assignments are common again — but the financing is the part that trips people up. Here's how it actually works.

The short answer

An assignment sale is when the original buyer of a pre-construction home (the "assignor") sells their purchase contract to a new buyer (the "assignee") before the build closes. The assignee takes over the contract, reimburses the deposits already paid, pays an assignment premium, and arranges their own mortgage for the final closing. Fewer lenders finance assignments, so you typically need an assignment-friendly lender, a larger cash position up front, and a clear plan for GST/HST, which can apply to the assignment fee and the home itself. See pre-construction and assignment options.

What you're actually buying

In a normal resale, you buy a finished property and title transfers on closing. In an assignment, there is no title to transfer yet — the building or home isn't registered. Instead, the original buyer assigns (hands over) their rights and obligations under the builder's Agreement of Purchase and Sale. You step into their shoes: you'll close directly with the builder at final closing, at the original contract price, plus you pay the assignor for the deposits they've already put down and usually a premium reflecting how much the property has appreciated since they signed.

The builder almost always has to consent to the assignment, and many charge an assignment fee (often a few thousand dollars, sometimes more) and restrict when and how assignments can happen. Always confirm the contract permits assignment before you commit.

How the money breaks down

An assignment has more moving parts than a resale down payment. Here's a typical structure on a hypothetical condo originally contracted at $600,000 that has since risen in value:

The catch: the deposit reimbursement and premium are usually due to the assignor on assignment — well before your mortgage funds at final closing. That's why assignments demand more cash up front than a standard purchase. Your mortgage covers the balance owing to the builder at final closing, not the money you hand the assignor today.

Why financing is different

Most major banks are cautious about assignments, and some won't finance them at all. The deals that do get done usually rely on assignment-friendly lenders who understand the structure. A few financing realities to plan for:

• Fewer lenders. Your options narrow, so working with a broker who knows which lenders accept assignments saves a lot of dead ends.
• Larger up-front cash. You're funding the assignor's deposit reimbursement and premium before mortgage money is available.
• Appraisal at assignment price vs. original price. This is the big one (see below).
• Documentation. Lenders want the full builder contract, the assignment agreement, proof of builder consent, and the deposit history.
• You qualify at final closing. Like any pre-construction deal, your income, credit, and debts must still pass the stress test when the mortgage funds — which can be months after you sign the assignment.

The appraisal problem: assignment price vs. original price

This is where assignment deals most often fall apart. You're paying the original contract price plus the premium — but some lenders will only lend against the original purchase price, not the higher price you actually paid. Others will lend on the assignment (current market) value if it appraises. If the lender uses the original price and you paid a $60,000 premium on top, that premium effectively comes out of your own pocket as additional down payment.

For example, on the $600,000 condo above with a $60,000 premium, your all-in cost is $660,000. If the lender appraises and lends against $600,000 with a 20% down requirement, they'll advance up to $480,000 — meaning you need to cover the remaining $180,000 yourself, including the full premium. Confirm before you sign which value your lender will use, because it changes how much cash you need. Run the numbers with the affordability calculator so you know your real position.

GST/HST considerations

Tax is the other place assignments surprise buyers. New and substantially renovated homes are subject to GST/HST in Canada, and as of 2022 the assignment fee/premium itself is generally taxable — the CRA treats the assignor's profit on the assignment as subject to GST/HST. Depending on the deal, that tax may be charged on the premium, and the new-home GST/HST on the property still applies at final closing. There are also rules around whether the original buyer intended to live in the home or treat it as an investment, which can affect rebates like the New Housing Rebate.

Because the tax treatment depends on the specifics, this is not a DIY area: get advice from a real estate lawyer and an accountant before you agree on price, so you know who is paying which tax and whether it's baked into the premium.

Risks and benefits

• Benefit — buy in a sold-out building. Assignments are often the only way into a project that's no longer selling units directly.
• Benefit — shorter wait. You buy later in the construction cycle, so you may close sooner than someone who bought at launch.
• Benefit — possible value play. If the market rose since the original signing, you still close at the original price plus premium, which can beat current new-launch pricing.
• Risk — financing falls through. Fewer lenders, appraisal-value uncertainty, and high up-front cash make these deals fragile.
• Risk — tax surprises. Unplanned GST/HST on the premium can wipe out the savings.
• Risk — builder restrictions. No consent, no deal — and some builders cap or prohibit assignments.

Who an assignment suits

Assignments tend to work best for buyers with strong cash reserves, stable income that will still qualify at closing, and a clear-eyed plan for the tax. They suit people who want into a specific building, investors comfortable with the extra complexity, and anyone advised properly on the legal and tax side. They're a poor fit if your down payment is tight, your income is about to change, or you can't get clarity on the appraisal value your lender will use.

Steps to do it right

• 1. Confirm the contract allows assignment and what the builder charges/requires.
• 2. Get a mortgage plan first. Talk to a broker about assignment-friendly lenders and which value (original vs. assignment) they'll use before you negotiate price. Start with a pre-approval.
• 3. Map the cash. Deposit reimbursement + premium + assignment fee + closing costs — know the total and when each is due.
• 4. Get legal and tax advice on GST/HST and the assignment agreement.
• 5. Line up the appraisal early so there are no value surprises at closing.
• 6. Keep your finances stable through to final closing so you still qualify.

Frequently asked questions

Can you get a mortgage on an assignment sale in Canada?

Yes, but with fewer lenders. Many big banks are cautious or decline assignments, so most deals go through assignment-friendly lenders. A broker can match you to one and confirm whether they'll lend on the original price or the higher assignment price.

Do you pay GST/HST on an assignment sale?

Often yes. Since 2022, the CRA generally treats the assignment premium as taxable for GST/HST, and the new-home GST/HST on the property still applies at final closing. The exact treatment depends on the deal, so get accounting and legal advice before agreeing on price.

Why do I need so much cash for an assignment?

Because you reimburse the original buyer's deposits and pay the premium up front — before your mortgage funds at final closing. Your mortgage only covers the balance owed to the builder, so the early cash comes from you.

What price does the lender appraise — original or assignment?

It varies by lender. Some lend only against the original contract price; others will lend on the current assignment value if it appraises. This single point can swing how much down payment you need, so confirm it before signing.

Is an assignment sale risky?

It carries more risk than a resale — fewer lenders, appraisal-value uncertainty, high up-front cash, tax exposure, and builder consent requirements. Done with good legal, tax, and mortgage advice, it can still be a smart way into a sold-out building.

Considering an assignment? Get the financing and tax plan nailed down before you sign anything. Ask Maya for a quick read on your numbers, or talk to an advisor who can line up an assignment-friendly lender.