An assignment the builder would not consent to

The situation

A buyer signed a pre-construction condominium agreement in Mississauga roughly two years before the building's expected occupancy date. Partway through the wait, a job relocation made it clear the unit would no longer suit the buyer's life once it closed — a common enough reason a pre-construction buyer looks to assign rather than close and immediately resell. The building was still under construction at the time of the request, well short of the interim occupancy date, so there was no practical reason the unit itself could not have changed hands before then.

The problem

An assignment sale means finding a new buyer to step into the original contract before final closing, so the original buyer never has to take title at all. Treadstone's own guidance describes exactly what that involves: the assignee is “buying a contractual position, not the unit itself, and eventually takes title from the builder once the building is ready” — which only works if the builder agrees to let the original buyer step out. This builder's agreement gave it sole, unexplained discretion to refuse, and it refused, roughly four months before the interim occupancy date, with no reason given beyond a form letter citing the relevant clause.

The numbers

No dollar figure is the point of this file — the buyer's exposure was to a closing they no longer wanted, not to a specific loss amount, and any dollar figure attached to a hypothetical resale would be a guess this page will not make. What matters procedurally is the four-month runway between the refusal and the occupancy date, which was enough time to plan around closing and relisting rather than scrambling.

The rule that decided it

Builder consent to an assignment is not a formality in Ontario — it is a genuine gate the buyer's own agreement usually hands entirely to the builder. As Treadstone's guidance puts it plainly: “most original purchase agreements with the builder address assignment directly, and very few permit it freely” — some prohibit it outright, others allow it only with written consent, sometimes tied to a consent fee, and the exact terms are contract-specific rather than standardized across builders. A companion guide to pre-construction buying confirms the same shape from the buyer's side: “assignment usually requires the developer's consent, and the agreement often charges an assignment fee,” and “sometimes it's prohibited or restricted until a certain point” in the build timeline.

There was no separate regulator to appeal to once the builder said no. The refusal sat entirely within the builder's contractual discretion as the buyer had agreed to it at signing — the clause the builder cited had been in the agreement from the start, simply never expected to matter until it did.

The outcome

With no path to assign, the buyer closed on the unit as originally scheduled and listed it for resale immediately after taking title, rather than transferring the pre-closing contract. Closing and reselling is a materially different transaction from an assignment — it means carrying the closing costs, land transfer tax, and financing on a unit the buyer no longer wanted, none of which an assignment would have required, plus a resale marketing period on top of everything else. An assignment, had the builder allowed it, would have let a new buyer step directly into the original contract and closed the file without the original buyer ever taking title at all.

The tell

The tell sat in the original agreement, read on day one and then not looked at again for two years. Assignment terms are negotiated, or at least reviewable, before signing — a buyer who anticipates any chance of needing to exit before closing has room to ask for a less restrictive assignment clause, or at least to understand exactly how discretionary the builder's consent right is, before committing to a two-year wait on a contract that cannot be renegotiated once signed. Treadstone's guidance flags the same discipline on the closely related HST question: whether HST applies to assignment profit is genuinely fact-specific and the source itself declines to generalize a blanket rule, which is exactly the kind of thing worth confirming case-by-case with an accountant rather than assuming either way. CRA’s own published position narrows that considerably: assignment-sale taxability itself is no longer the fact-specific question the source above frames it as. CRA states plainly that effective May 7, 2022, all assignment sales of newly constructed or substantially renovated residential housing are taxable for GST/HST purposes, regardless of the assignor’s original intent. What stays genuinely fact-specific is narrower: whether the deposit portion is itself taxed turns on when the assignment agreement was signed and whether the deposit is separately and clearly stated in it — exactly the kind of detail worth confirming case-by-case with an accountant.

Takeaways

• • An assignment sale transfers a contractual position, not title — and it only works with the builder's consent, which most pre-construction agreements make entirely discretionary.
• • Very few builder agreements permit assignment freely; the terms are contract-specific and worth reading before signing, not after a relocation forces the question.
• • Assignment of agreement, defined covers the mechanics of the contract transfer itself.
• • Since May 7, 2022, CRA treats every assignment sale of newly constructed or substantially renovated housing as taxable for GST/HST — a blanket rule, not the intent-based test the guidance above once described; only the deposit’s own tax treatment stays fact-specific.