Tarion Warranty Coverage for Custom Homes Explained
Last Updated: October 29, 2026
Quick Summary
Tarion warranty coverage for a custom home depends on whether the builder is registered and licensed and whether the home qualifies under the Ontario New Home Warranties Plan Act. The label on the contract does not decide eligibility; the facts of the build do. Confirm registration and licensing before relying on any protection.
Verify the builder's Tarion registration and HCRA licence before signing the construction contract.
Write down which work is owner-supplied, since that work can fall outside builder responsibility.
Record the possession or closing date in writing, because it starts all coverage periods.
Report defects in writing as they appear and keep dated photos and a log.
Keep the contract, change orders, specifications and all builder correspondence for any dispute.
Table of Contents
Whether Tarion warranty coverage applies to a custom home depends on how the home was contracted and who is registered as the builder. Many Ontario homeowners assume that any newly built house comes with the same protection, but that assumption can leave a costly gap.
Tarion is the organization that administers the statutory warranty program for new homes in Ontario. You can verify HCRA builder licensing step by step before relying on any coverage. You can read the official program rules directly from Tarion Warranty Corporation program overview, and verify builder licensing through Home Construction Regulatory Authority builder licensing information.
Custom Home vs Contract Home for Tarion Purposes
The distinction that matters most is between a custom home and a contract home. A custom home is generally one built to the owner's own design on a lot the owner has chosen, while a contract home is one the owner has agreed to purchase from a builder under a construction contract. Both can fall under Tarion, but the rules that apply to each differ in how the warranty is triggered and what the owner must do. Read your construction contract carefully, because the label the builder uses does not decide eligibility on its own. The facts of the build do.
Custom-Home Eligibility Decision Tree
Use these questions in order to test whether a custom build is likely to be covered:
Is the builder registered with Tarion and licensed by HCRA at the time the contract is signed?
Is there a written construction contract that sets out the builder's obligations?
Is the home being built for residential occupation, and is it a new home rather than a renovation?
Did the owner supply substantial design or construction work that the builder does not control?
If the answer to the first three questions is yes, the home is generally in scope. A "no" on the fourth question matters most, because owner-supplied work can carve out parts of the build from builder responsibility, a point we return to under exclusions.
Tarion Warranty Coverage for Contract Homes and Builder Obligations
Tarion warranty coverage for contract homes places defined obligations on the builder, and those obligations are the core of what the owner can rely on. Tarion sets out warranty standards for workmanship, materials, and structural elements, and the official program documentation describes the builder's obligations in full.
The practical effect is that a builder cannot simply disclaim responsibility after possession. Your protection depends on the builder staying registered and on the contract accurately describing what is being built.
Tarion Warranty Coverage Periods and What Each Protects
Tarion coverage runs in stages, each protecting different parts of the home for a different length of time. Knowing which stage a defect falls into determines both who is responsible and how you must report it.
One-Year, Two-Year and Seven-Year Coverage
Official Tarion documentation sets out which defects each coverage period protects, and those program rules should be checked directly before relying on a specific coverage period.
These periods are the reason timing matters so much. A defect that appears in month eighteen may fall under the two-year coverage rather than the one-year, and a serious structural failure in year five is covered by the seven-year warranty. Keep a dated log of any problem you notice. Documenting these issues early is particularly vital for components like shingles or flashing, where understanding the nuances of roofing warranty coverage helps ensure that long-term protection remains intact.
Coverage Limits and How Compensation Works
Tarion coverage is not unlimited. Confirm the current coverage limits and compensation rules in the official Tarion documentation before assuming a specific repair will be paid in full, since the program sets these and they can change.
Tarion Warranty Coverage and Exclusions: What Is Not Protected
Tarion does not cover everything that goes wrong in a house. Normal wear and tear, damage from the owner's negligence, and deficiencies caused by improper maintenance fall outside the warranty (What is not covered by the new home warranty). Items the owner has supplied or installed separately may also be excluded from builder responsibility, so the boundary between builder work and owner work should be written down before construction begins.
Owner-Supplied Work and Maintenance Exclusions
Owner-supplied work is one of the most common sources of disputes on custom builds. If you select and install your own appliances, landscaping, or specialty finishes, a failure in those items may not be the builder's responsibility. Maintenance exclusions are equally important: regular inspections, cleaning of drains and gutters, and seasonal upkeep are the owner's duty, and failing to perform them can void a claim. A common mistake is assuming the warranty replaces basic maintenance. It does not.
Tarion Warranty Deadlines and Timelines for Custom Builds
Deadlines are where custom-home owners most often lose coverage they could have kept. Each warranty stage has its own reporting window, so track the dates carefully. The timeline below turns the program rules into a practical sequence.
When the warranty clock starts for a custom home
Confirm in the official program documentation when the warranty period begins, and record the possession or closing date in writing. On a custom build, possession can be phased or can follow an occupancy permit, so the date that matters is the one recorded in the closing documents. Record the possession date in writing, keep the closing documents, and note the date the home was enrolled in the program. That single date sets the clock for all three coverage stages.
Practical timeline for a custom build
Before signing: verify the builder's Tarion registration and HCRA licence, and confirm the contract identifies owner-supplied work.
At signing: confirm the home will be enrolled in the program and keep the enrollment documentation.
At possession or closing: record the date in writing; this is the start of the one-year, two-year, and seven-year periods.
During the one-year period: report workmanship and materials defects in writing as they appear, and keep dated photos and a log.
Before the one-year period ends: submit any outstanding one-year items through the process set out in the warranty documentation, because items not reported in the window can fall outside coverage.
During the two-year period: report building-envelope and systems defects, including water penetration, as they appear.
During the seven-year period: report major structural defects in load-bearing elements as they appear.
Claim deadlines and step-by-step filing
When a defect appears, follow a consistent sequence so the claim is properly documented and filed inside the applicable window.
Document the defect. Take dated photos, write a short description of what you observed and where, and note when it first appeared.
Notify the builder in writing. Use the reporting process set out in the warranty documentation, keep a copy, and record the date sent.
Allow the builder to inspect and repair. Give reasonable access, record each visit, and keep the builder's written response.
Escalate if the repair is unsatisfactory. If the builder does not correct the defect, file with Tarion within the deadline for the coverage stage the defect falls under.
Track every deadline. Note the coverage stage, the date the defect was first observed, and the date the claim must be filed; missing the window can weaken or eliminate the claim.
Watch Out A defect reported after the relevant window closes may not be accepted, even where the underlying problem is genuine. Report early and in writing rather than waiting for a repair to be completed.
Evidence to collect for a custom-home claim
A complete record is the strongest position in any dispute. Keep the construction contract, the warranty certificate and enrollment documents, every change order and specification sheet, dated photos of the defect, the written notice sent to the builder, the builder's responses, and any inspection reports. For owner-supplied items, keep the receipts and approvals, because they establish which party was responsible for the work.
Disputes, appeals and escalation options
If a builder disagrees with a claim, or a decision does not resolve the issue, review the decision letter for the stated reasons and the deadline to respond. Disputes over a coverage decision are generally handled through the program's own review process before any external option is considered. Keep records throughout, because they support every stage of escalation, and confirm the current review routes in the official program documentation before relying on a particular step.
Step-by-Step Tarion Warranty Claim Process
When a defect appears, follow a consistent sequence so the claim is properly documented.
Document the defect. Take dated photos and write a short description of what you observed and where.
Notify the builder in writing. Use the reporting process set out in the warranty documentation and keep a copy.
Allow the builder to inspect and repair. Give reasonable access and record each visit.
Escalate if the repair is unsatisfactory. If the builder does not correct the defect, file with Tarion within the applicable deadline.
Track every deadline. Note the coverage stage the defect falls under and the date the claim must be filed.
We recommend a folder with the contract, the warranty certificate, every email, and every photo, because a complete record is the strongest position in any dispute.
Disputes, Appeals and Escalation Options
If a builder disagrees with your claim, or a decision does not resolve the issue, Escalation and dispute routes are described in the official program documentation. Review the decision letter for the stated reasons and the deadline to respond. Disputes over a coverage decision are generally handled through Tarion's own review process before any external option is considered. Keep records throughout, since they support every stage of escalation.
Planning Your Custom Build With Warranty Protection in Mind
Warranty protection starts at the planning stage, not after the keys change hands. Confirm builder registration, insist on a written contract that defines owner-supplied work, and build a schedule that records every milestone. Contact Compass Custom Homes to discuss how warranty coverage applies to your specific project. Our guide to building a custom home on your lot in Ontario walks through lot assessment, permits, and the construction timeline. Contact our team to review how warranty coverage applies to your specific build before you sign.
Frequently Asked Questions
Does Tarion warranty coverage apply to custom homes?
Tarion coverage depends on whether the home is enrolled and who the builder is, not only on the word 'custom'. A home built under a construction contract by a Tarion-registered builder is generally covered, but owner-contracted or owner-supplied arrangements can fall outside the statutory warranty. Confirm enrolment and the builder's registration before signing, and ask Compass Custom Homes for current guidance on how your specific project is documented.
What is not covered by a Tarion warranty?
Tarion does not cover normal wear and tear, damage caused by homeowner neglect or lack of maintenance, and most work the homeowner performs or contracts separately. Items like landscaping, certain appliances and some finishes may be covered by manufacturer warranties instead. Defects must fall within the statutory warranty categories, so keep records of maintenance and any owner-supplied work.
How long does Tarion warranty coverage last?
Tarion coverage runs in stages with different lengths for different parts of the home. Check the official program documentation for the periods and when they begin. Keep track of each date, since later claims must be reported within the applicable period.
How do I make a Tarion warranty claim?
Start by documenting the defect with dated photos and a written description, then notify the builder in writing. Keep copies of all correspondence, and consult the official Tarion documentation for the claim process and deadlines.
Can a Tarion warranty be transferred to a new owner?
Whether Tarion coverage carries over to a subsequent owner is set out in the official program documentation, so confirm the remaining coverage periods during the sale process. Ask for the warranty certificate and confirm the remaining coverage periods during the sale process.
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