- 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.
- While the exact wording varies by builder and by the specific form in use, the Addendum generally sets out: - Deposit protection — a plain-language statement of the statutory protection…
- A builder cannot ask you to sign away the protections the Addendum describes, and cannot substitute its own, less protective language in place of the statutory requirements.
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 the mechanism through which Ontario's mandatory new-home warranty scheme, created under the Ontario New Home Warranties Plan Act and administered by Tarion Warranty Corporation, actually attaches itself to your specific purchase. 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 ask 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:
- Deposit protection — a plain-language statement of the statutory protection that applies to money you've put down before closing.
- 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.
- Warranty coverage summary — a summary of what the statutory warranty covers once you take possession, and the tiered coverage periods that apply.
- 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 You Can't Waive It
A builder cannot ask you to sign away the protections the Addendum describes, 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 protection, 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 real estate lawyer who works regularly with pre-construction purchases can flag whether what you've been given actually reflects your statutory protections.
Frequently asked questions
Do I get the Addendum with every new condo purchase, or only some?
It's a required part of the agreement whenever you're buying directly from a builder or vendor of a new condo unit in Ontario. It doesn't apply to resale purchases between private owners, since those aren't covered by the new-home warranty scheme in the same way.
Can my builder charge me extra for the protections in the Addendum?
No. The statutory protections aren't an optional add-on the builder can price separately — they're a baseline requirement of selling a new home or condo unit in Ontario.
What if I already signed and never noticed whether the Addendum was included?
Have a lawyer review your signed agreement. If something is missing or looks non-compliant, there may be options depending on where you are in the purchase timeline — but this is very fact-specific, so don't assume anything until it's been reviewed.
Is the Addendum the same as the status certificate or disclosure statement?
No. The disclosure statement and status certificate are different documents entirely — one is the builder's pre-construction disclosure package, the other is a resale condo's financial and governance snapshot. The Addendum is specifically the statutory warranty and protection summary attached to a new-home purchase agreement.
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