The Tarion Addendum to Your Condo Purchase Agreement in Ontario: What It Means

When you sign an agreement of purchase and sale for a new condo unit in Ontario, you're not just signing the builder's contract — you're also signing a document bundled into it: the Tarion Addendum. Buyers often skim past it, assuming it's boilerplate. It isn't.

The Addendum is how the delayed occupancy warranty of Ontario's mandatory new-home warranty scheme, created under the Ontario New Home Warranties Plan Act and administered by Tarion Warranty Corporation, is written into your specific purchase; the other statutory warranties apply by law. It sits alongside — and in places overrides — whatever the builder's own agreement says.

This article explains what the Addendum generally covers, why a builder can't leave it out or require you to waive it, and what to check for before you sign.

What the Tarion Addendum Actually Is

Every agreement of purchase and sale for a new home or condo unit sold by an Ontario builder or vendor must incorporate the Tarion Addendum. It isn't a separate contract you can decline — it's a required component of the statutory warranty framework that Tarion administers under the Ontario New Home Warranties Plan Act.

The Addendum exists because a builder's own purchase agreement, drafted by and for the builder, wouldn't otherwise be required to explain your statutory protections in plain terms. The Addendum standardizes that disclosure across every builder in the province.

What the Addendum Typically Covers

While the exact wording varies by builder and by the specific form in use, the Addendum generally sets out:

• Refund of deposits — if the agreement is terminated other than for your breach, the builder must refund all monies paid, including deposits, with interest.
• Occupancy or closing date structure — how the builder is permitted to set and change your move-in or closing date, including the framework of tentative, firm, and outside dates used for condo occupancy.
• Early termination conditions — the limited conditions, listed in the Addendum, under which the agreement can be ended before closing.
• Your cancellation and compensation rights — the circumstances in which delay or cancellation triggers rights for you as the buyer.

Because these protections come from statute rather than the builder's goodwill, the Addendum's language is meant to track the legal framework closely rather than the builder's preferred phrasing.

Why a Builder Cannot Require a Waiver

A builder cannot require you to give up the protections the Addendum describes (a change such as a later date or a waiver of delay compensation must be your entirely voluntary choice, made in the way the Addendum sets out), and cannot substitute its own, less protective language in place of the statutory requirements. If a builder's agreement is silent on a point the Addendum is supposed to cover, the statutory requirement still applies — the builder's silence doesn't remove your protection, it just makes the agreement incomplete.

This matters because pre-construction agreements are often long, dense documents drafted entirely by the builder's counsel. A buyer reading quickly can easily miss whether the required Addendum language has actually been included, or whether it's been altered in a way that understates what the law provides.

How the Addendum Interacts With the Rest of Your Agreement

Where the builder's agreement and the Addendum conflict, the statutory protections in the Addendum are what actually govern — not whatever more buyer-unfriendly language the builder's own drafting might contain. Your lawyer's review of a pre-construction agreement should specifically check that:

• The Addendum is present and appears to be the current, complete version.
• Nothing elsewhere in the agreement purports to override or narrow what the Addendum says.
• The deposit refund terms, occupancy date, and warranty language matches what you'd expect from the statutory framework.
• Any builder-added conditions are clearly separate from, not disguised as, the Addendum itself.

If Something Looks Off

If a builder's agreement doesn't include the Addendum, or includes a version that looks altered or incomplete, that's a signal to slow down before signing — not a technicality to overlook. A lawyer can flag whether what you've been given actually reflects your statutory protections.

Frequently asked questions