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Selling Your Pre-Construction Condo Before Closing in Ontario

Understand what to check before selling a pre-construction condo before closing in Ontario: your agreement, builder consent, tax and deposit risks.

Real Estate4 min readTSLBy the Treadstone Law Team · OntarioUpdated November 13, 2026
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Key takeaways
  • Whether you can assign your unit, and whether the builder must consent, is decided by the wording of your own purchase agreement.
  • Obligations such as interim occupancy fees and the builder's cancellation conditions are part of the deal you would be passing on.
  • Tax on any profit and other legal risks depend on your situation, so speak to an accountant and a lawyer before you sign.

An assignment sale means you sell your place in a pre-construction condo purchase to someone else before the unit closes. Buyers sometimes consider it when plans change, money gets tight or the market moves.

This article explains in general terms what to look at before you try one. The rules on assignments, consent and tax depend heavily on your agreement and your finances, so treat this as a checklist for conversations with a lawyer and an accountant.

What an assignment sale is

When you sign a pre-construction agreement, you promise to buy a unit that does not yet exist. In an assignment, you transfer that promise, and your rights under it, to a new buyer. The new buyer steps into your position and usually pays you for it.

Because the new buyer takes over your agreement, the quality of that agreement, and what it says about assignments, matters a great deal.

Does the builder have to consent?

Many agreements say whether you may assign and on what terms, and some require the builder's written consent or allow it to refuse. Read the assignment clause carefully, and do not advertise or sign anything until you know what it requires. A lawyer can read it with you and tell you what it means in practice.

A pre-construction agreement is not binding until the buyer has received both the disclosure statement and Ontario's Residential Condominium Buyers' Guide from the builder. If you are still within the 10-day cooling-off period, you may be able to rescind the agreement instead of assigning it. That period starts once you have the purchase agreement, the disclosure statement and the Condo Buyers' Guide.

What the new buyer inherits

A new buyer will want to know about the risks that come with the project. These are some of the points a careful buyer, and the lawyer advising them, will look at.

If you remain liable under the agreement after assigning, a problem with the project could still affect you. Ask a lawyer whether you stay on the hook.

Tax and legal risks

Selling your rights for more than you paid can have tax consequences, and how the profit is treated depends on your circumstances and your purpose in buying. An accountant can explain how it applies to you, and it is better to ask before you sign than after.

Other risks are practical. An assignment that breaks a clause in your agreement could put your deposit and your deal at risk, and a buyer who finds the project is cancelled or delayed may look back to you. Written terms that clearly say who pays what, and when, can reduce disputes.

What to do next

Frequently asked questions

Do I need the builder's permission to assign my unit?

It depends on the wording of your purchase agreement, which may set conditions or require consent. Have a lawyer read the assignment clause before you market the unit.

Can I cancel instead of assigning?

You may have a cooling-off right in some cases. A buyer of a new condo from a builder has a 10-day cooling-off period to rescind, which starts once the buyer has the purchase agreement, the disclosure statement and the Condo Buyers' Guide.

Will I owe tax on an assignment profit?

Possibly. How a gain is taxed depends on your circumstances, so ask an accountant before you sign.

What happens to my deposit if I assign?

That depends on the assignment terms and your agreement. Money a condo builder receives, including deposits, must generally be held in trust under the Condominium Act. A lawyer can explain how your deposit is handled in a sale.

Sources

Links go to official government, court and regulator pages. The law changes — confirm you are reading the current version.

This article is general information, not legal advice. Reading it does not create a lawyer-client relationship. Ontario laws, tax rates, and government programs change, and how the law applies depends on your specific facts. For advice about your situation, speak with a licensed Ontario lawyer. Treadstone Law is licensed by the Law Society of Ontario — reach us at 1-844-900-1070 or start a file online.

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