Tarion is one of the most misunderstood parts of building or renovating a home in Ontario. Homeowners often assume it’s a blanket guarantee on any work done to their house — and just as often discover, at the worst possible moment, that it doesn’t apply to their project at all. So here’s a plain-English explanation of what the Tarion warranty actually is, what it covers across its 1-, 2-, and 7-year periods, and — the part that matters most for East-Toronto renovators — when it applies to your home and when it doesn’t.
This is general information, not legal advice. For your specific situation, confirm with Tarion or your builder.
What Tarion is
Tarion administers Ontario’s new-home warranty under the Ontario New Home Warranties Plan Act. The warranty itself is provided by your builder — Tarion backs and enforces it. For coverage to exist, two things have to be true: the builder must be licensed (today that licensing is handled by the Home Construction Regulatory Authority, or HCRA), and the home must be enrolled with Tarion. You can confirm both in the public Ontario Builder Directory before you sign anything.
It’s worth separating two names people mix up. HCRA licenses and regulates the builders and vendors themselves (it took over that role in 2021). Tarion administers the warranty program that protects the buyer. A reputable builder is licensed by HCRA and enrols eligible homes with Tarion.
The question every renovator asks: does Tarion cover my project?
For most renovations and additions to an existing, previously occupied home — no, it doesn’t. Tarion protects new homes: new freehold houses, new condo units, and certain rebuilds that meet the legal definition of a new home. A typical renovation, addition, or basement underpinning on a century-old Leslieville semi falls outside that definition.
That surprises people, and it’s exactly why it’s worth understanding before you start. If Tarion doesn’t apply to your renovation, your protection comes from somewhere else entirely: a clear, detailed contract; proper permits and City inspections; your builder’s own workmanship standards; and — with a builder like us — open-book, cost-plus transparency so there are no hidden surprises. The absence of Tarion isn’t a gap to worry about on a renovation; it just means your contract and your builder’s integrity are the warranty.
Woodsmith Insight: We pursued our HCRA licence and Tarion certification even though most of our work is renovation. Why? Because the same discipline that lets us build a fully warrantied new home — proper enrolment, documentation, code compliance — is the discipline we bring to every renovation, warranty or not.
Where the line actually is — and why two government sources disagree
Here is the part that trips people up, and it is not their fault. Two official sources describe this differently.
The Province’s own guide to adding a laneway house puts it as flatly as it can: “Tarion requirements do not apply when renovating an existing building to create a dwelling unit.” Read that on its own and you would conclude the matter is settled — renovation means no Tarion, full stop.
The regulator says something more careful. The Home Construction Regulatory Authority’s advisory on the common definition of “home” — the document that actually governs who has to be licensed — says that to be a new home, what you are building “must be more than just a renovation to an existing building,” and then adds the sentence that changes everything: “A particular construction may incorporate some pre-existing elements into the construction and might still be considered a new home for licensing and warranty purposes.”
So: keeping parts of the old house does not automatically keep you on the renovation side of the line.
Both statements are true. The Province is describing the ordinary case, and the ordinary case is the overwhelming majority — you gut a kitchen, you add a rear extension, you underpin a basement, you build a legal suite inside the existing walls. None of that is a new home. Nobody needs an HCRA licence for it and nothing gets enrolled with Tarion.
The regulator is describing the edge, and the edge is real. On a narrow East-Toronto lot the edge shows up more often than it does almost anywhere else in the province, because of how people build here: you keep a party wall because you have to, you keep a foundation because removing it would take the neighbour’s house with it, and by the time you are finished there is very little of the original house left standing.
HCRA does not publish a percentage. There is no “if you keep forty per cent of the walls” test, and anyone who tells you there is has made it up. The advisory says outcomes “depend on the circumstances.” What that means in practice is that it is a question to ask early, in writing, rather than a question to discover at the end.
The pre-existing foundation question
The clearest place this bites is the foundation, and HCRA gives it its own heading: “Foundations, including a pre-existing foundation.” In the advisory’s own summary table of what counts as a home, one of the listed entries is a dwelling “built on all or part of a pre-existing foundation.”
That is worth sitting with, because “we’re keeping the foundation” is the single most common way an East-Toronto project describes itself. Sometimes it means the basement stays exactly as it is. Sometimes it means the house above it is coming off entirely and something new is going back on top. Those are very different projects wearing the same sentence, and only one of them is obviously a renovation.
Two things follow, and the second one is the one people miss.
First, keeping the old foundation does not exempt it from the current Code. HCRA is explicit: “local building officials undertake a footing and foundation inspection, and the foundation, even if incorporating elements of a pre-existing foundation, must still meet the requirements of the Ontario Building Code.” A hundred-year-old rubble or unreinforced-brick foundation was built to no code at all. If you are putting a new structure on it, somebody has to demonstrate it can carry the load — and often the honest answer is that it cannot, which is how a “we’re keeping the foundation” job turns into underpinning or a rebuild from underneath.
Second — and this is the one worth knowing before you sign anything — even where a project is a new home and warranty coverage does apply, that coverage does not necessarily reach the old parts. Where the owner supplied the pre-existing elements, section 13(2) of the Ontario New Home Warranties Plan Act excludes them. HCRA spells it out: warranty coverage “would not extend to those elements based on ss.13(2) of ONHWPA, which excludes coverage for an element supplied by the owner.”
Which produces a genuinely awkward result, and we would rather you heard it from us: you can end up with a house that is legally a new home, properly enrolled, carrying a seven-year warranty — and the oldest, most likely-to-fail part of it, the thing sitting under everything else, sits outside that warranty. The warranty covers the part we built. It does not cover the part you already owned.
Woodsmith Insight: When a client tells us they want to keep the foundation, we treat it as a question, not a decision. We want to know what is actually down there before anybody prices anything — because the answer changes the budget, the schedule, whether the project needs a licensed builder and an enrolment, and what your warranty will and will not reach. On a century home in Riverdale or the Beaches, that half-day of investigation is the cheapest money you will spend on the whole job.
Your laneway suite is a new home — even though it’s in your own backyard
This one surprises almost everybody, including builders.
If you build a laneway or coach house on the lot you already live on, you are not renovating. You are building a new home, and HCRA treats it as one. Its advisory describes coach and laneway homes as “homes built on a lot, which already contains an existing, fully detached (and typically larger) home” — and against that entry it records, plainly: Licensing: Required. Warranty Coverage: Covered.
The objections people raise have all been answered in advance. It is small — doesn’t matter. It is behind your own house — doesn’t matter. It shares the water and the electrical with the main house — HCRA addresses that directly: “Sharing a lot or sharing services does not remove the obligation to be licensed nor does that fact alone exclude the home from warranty coverage.” The Province’s own laneway-house guide says the same thing from the other side: “all builders of new homes must be registered with the Home Construction Regulatory Authority.”
So if you are hiring someone to build it — what the advisory calls a contract home — that builder needs to hold an HCRA licence, and the suite needs to be enrolled with Tarion before construction starts, not afterwards. If you genuinely build it yourself, as an owner-builder, different rules apply and you do not get the warranty.
On garden suites, we are going to be careful with you, because this is where confident writing gets ahead of the sources. HCRA’s advisory names coach or laneway homes. It does not use the phrase “garden suite” anywhere, and neither does Tarion’s website. The Province’s laneway guide does discuss garden suites — but under municipal rules, where it says they must meet “many of the same planning, Building Code and Fire Code requirements as laneway houses.” Planning, Code, Fire Code. It stops there. It does not extend the sentence to HCRA or Tarion.
Our reading — and we will call it a reading, not a rule — is that the distinction is very unlikely to matter, because HCRA’s test turns on whether you are building a new, self-contained dwelling meant for year-round occupancy, not on whether there is a laneway behind it. A garden suite meets every part of that description except the word. But since the regulators have not said it in those terms, the right move is not to assume. Ask Tarion and ask HCRA about your specific suite, in writing, before you start. It is a phone call and an email, and it is a great deal cheaper than the alternative.
Either way, it belongs in the same conversation as everything else in our guide to what the City’s free garden-suite plans don’t cover — the plans, the fire-access rules, the servicing, and now this. And note the contrast with a basement suite inside your existing house, or a multiplex conversion of the house you already own: those are renovations to an existing building, and the Province’s flat rule fits them cleanly. Same backyard, same owner, completely different regulatory answer depending on whether the dwelling is new construction or carved out of what is already standing.
What happens when someone gets this wrong
This is not a theoretical filing requirement, and the regulator has been visible about it recently.
On July 9, 2026, HCRA announced the outcome of two related investigations. It suspended one builder’s licence over more than $31,000 in unaccounted purchaser warranty-enrolment funds — money collected from buyers that never reached the enrolment it was collected for. In the second, it laid eight charges under the Provincial Offences Act against a company for building without a licence and without Tarion enrolment.
Note who carries the loss in that second scenario. If a home that should have been enrolled never was, the homeowner does not have a warranty. Not a reduced warranty — none. The builder faces charges, but that is a matter between the builder and the regulator; it does not retroactively create the coverage the owner thought they had.
We have written before about how homeowners get hurt on renovation projects, and the pattern here is the familiar one. The failure is almost never dramatic. It is a box that never got ticked at the start, on a project where nobody thought to ask, discovered years later by someone with a problem and no coverage.
How to check, before you sign
Five minutes, and you can do all of it yourself.
Ask one question, and ask it in writing: is this project a renovation or a new home? Put it in an email. A builder who does this work will have a clear answer and will not mind being asked. A builder who becomes vague is telling you something.
If the answer is “new home,” check the licence. HCRA publishes the Ontario Builder Directory — every licensed builder and vendor in the province, with their licence status, how long they have been active, how many homes they have built, and any regulatory action taken against them. It is public and free. Look your builder up before you sign, not after.
Confirm the enrolment happens before construction starts. Not at framing, not at closing. Before. Enrolment is what makes the warranty exist.
If you are anywhere near the line, ask the regulators directly. Contact HCRA and Tarion, describe your specific project, get the answer in writing, and keep it in the file. There is no bright line published, so the only reliable answer is the one that applies to your project.
And if the answer is “renovation” — which for most East-Toronto work it is — understand what has replaced the warranty. Not nothing. A detailed scope, real permits and inspections, a builder who carries proper insurance, and a contract that says who fixes what and for how long. That is the protection on a renovation, and it is only as good as the people standing behind it. This is why we hold our HCRA licence and Tarion certification even though most of our work does not require them — when a project does cross the line we are already on the right side of it, and when it doesn’t, the standards we had to meet to get licensed don’t switch off.
If you are trying to work out which side of the line your project falls on, talk to us. It is the kind of question that is quick to answer early and expensive to answer late.
Before you move in: deposit and delayed-closing protection
For new homes, Tarion coverage starts before you ever get the keys.
Deposit protection. If your builder becomes insolvent or fails to return your deposit, Tarion protects it — generally up to $20,000, and up to $60,000 for a freehold home priced at $600,000 or less (for purchase agreements signed on or after January 1, 2018). Condominium deposit protection works differently.
Delayed closing or occupancy compensation. If your builder misses a firm closing or occupancy date, you may be entitled to compensation up to a maximum of $7,500 — which includes $150 per day for living expenses like accommodation and meals during the delay, plus other delay-related costs such as moving or storage.
After you move in: the 1-, 2-, and 7-year warranty
Once you take possession of a new home, coverage runs in three layers, each starting on your possession date:
One-year warranty. The home must be fit to live in, built to the Ontario Building Code, and free from defects in materials and workmanship — with no unauthorized substitutions from what you were promised. This is the broadest layer and covers the everyday defects that show up in a first year.
Two-year warranty. This adds protection for the things that tend to reveal themselves a little later: water penetration through the building envelope or foundation; defects in the electrical, plumbing, and heating delivery systems; defects in exterior cladding; and Building Code violations that affect health and safety.
Seven-year warranty. The longest layer covers major structural defects — failures in load-bearing elements, or defects serious enough to materially affect your ability to use the home as a residence. A major structural defect claim must be made to Tarion, in writing, before the end of the seventh year.
How claims actually work
A few mechanics are worth knowing so coverage doesn’t lapse on a technicality:
Your warranty experience starts with the Pre-Delivery Inspection (PDI) — a walkthrough where you document the home’s condition before taking possession. After that, you don’t report issues whenever you like; you submit warranty forms to Tarion at specific windows (typically within your first 30 days, again near the end of the first year, and near the end of the second year), with major structural defects reportable any time before the end of year seven. Submitting a statutory warranty form opens a defined builder repair period (commonly 120 days) during which your builder addresses the items. Claims are filed through Tarion’s online MyHome portal.
The practical takeaway: the warranty is real and valuable, but it rewards homeowners who keep records and submit on time.
When Tarion matters in the East end — and when it doesn’t
For our neighbourhoods, it usually comes down to one question: new home, or renovation?
A new custom home or full teardown-and-rebuild — say, a new build on a Beaches lot — is covered by Tarion if it’s built by a licensed vendor and properly enrolled, with the full deposit, delayed-closing, and 1/2/7-year protections.
A typical renovation, addition, or underpinning on a century home in Leslieville, Riverdale, or East York generally is not a Tarion matter. Your protection is your contract, your permits and inspections, and your builder’s transparency and systems.
How Woodsmith handles both
If you’re building a new home, we walk you through enrolment, the PDI, the warranty forms, and the timelines so your coverage is intact and you know how to use it. If you’re renovating, we set the expectation clearly that Tarion doesn’t apply — and we replace that reassurance with detailed scopes, full permit compliance, City inspections, and open-book cost-plus pricing. Either way, you know exactly what protects you.
Have a question about whether your project is covered? Get in touch — we’re happy to explain where you stand before you commit.
Frequently asked questions
For new homes in Ontario: deposit protection and delayed-closing compensation before you move in, then a 1-year warranty (defects in work and materials, Building Code compliance), a 2-year warranty (water penetration, electrical/plumbing/heating systems, exterior cladding, health-and-safety Code issues), and a 7-year warranty for major structural defects.
Generally no. Tarion protects new homes and certain rebuilds that meet the legal definition of a new home. Most renovations and additions to an existing, previously occupied home fall outside Tarion — your protection comes from your contract, permits and inspections, and your builder.
Generally up to $20,000, and up to $60,000 for a freehold home priced at $600,000 or less (for agreements signed on or after January 1, 2018). Condominium deposit protection differs.
Up to a maximum of $7,500, including $150 per day for living expenses during the delay plus other delay-related costs such as moving or storage.
Coverage runs 1, 2, and 7 years from your possession date, with each period covering different items — major structural defects are the 7-year layer.
HCRA licenses and regulates Ontario’s home builders and vendors (since 2021); Tarion administers the new-home warranty that protects buyers. A reputable builder is HCRA-licensed and enrols eligible homes with Tarion.
Submit the relevant warranty form through Tarion’s MyHome portal within the applicable window. Filing opens a builder repair period (commonly 120 days) to address the items; major structural defect claims must be made before the end of year seven.
Possibly — and it is the right question to ask early. HCRA’s position is that a project can incorporate pre-existing elements and still be a new home for licensing and warranty purposes; a dwelling built on all or part of a pre-existing foundation is specifically listed as something that can qualify. There is no published percentage or wall-count test — HCRA says it depends on the circumstances. Get the answer in writing from HCRA and Tarion before construction begins, because if it is a new home, both the licence and the enrolment have to be in place first.
Yes, if you are hiring someone to build it. HCRA classes coach and laneway homes as new homes — licensing required, warranty coverage applies — and states that sharing a lot or sharing services with the main house does not change that. Ontario’s own laneway-house guide says the same. The suite should be enrolled with Tarion before construction starts. If you build it yourself as an owner-builder, the rules are different and the warranty does not apply.
Most likely, but we would not want to state it as settled. HCRA’s advisory names coach and laneway homes and does not use the term “garden suite”; neither does Tarion. Ontario’s guide discusses garden suites but limits the comparison to planning, Building Code and Fire Code requirements. Since HCRA’s test is about building a new self-contained dwelling for year-round occupancy rather than about laneway access, a garden suite would normally be expected to fall the same way — but confirm it with HCRA and Tarion for your specific project rather than assuming.
That advice circulates, and it predates the current framework — HCRA took over builder licensing in 2021, and its advisory on the definition of “home” specifically lists a dwelling built on all or part of a pre-existing foundation as something that can be a home for licensing and warranty purposes. So the blanket version is not right. What is true is narrower and still important: where warranty coverage applies, it does not extend to pre-existing elements supplied by the owner, under section 13(2) of the Ontario New Home Warranties Plan Act. The new work can be covered while the old foundation underneath it is not.
You don’t have a warranty. HCRA does enforce this — in July 2026 it laid eight Provincial Offences Act charges against a company for building without a licence and without Tarion enrolment, and separately suspended a builder’s licence over unaccounted enrolment funds — but enforcement against the builder does not create coverage for you after the fact. This is why checking the Ontario Builder Directory and confirming enrolment before construction starts matters more than any other single step.
