If you're buying a new build home in Ontario, you have Tarion warranty coverage. It's mandatory. Every new home builder in the province is registered with Tarion, and every new home is covered under the Ontario New Home Warranties Plan Act.
That coverage is valuable. But it is not a substitute for a professional PDI inspection. Here's why — and why the smartest new build buyers in Milton, Oakville, and the GTA use both.
What Tarion Covers
Tarion warranty coverage has several tiers. The first-year coverage addresses defects in work and materials, unauthorized substitutions, violations of the Ontario Building Code, and items listed on your PDI form that weren't resolved. Beyond the first year, you get two-year coverage for water penetration, electrical, plumbing, and heating delivery and distribution, plus seven-year coverage for major structural defects.
This is solid protection — on paper. The issue is how the process works in practice.
The Problem with Relying on Warranty Alone
Warranty is reactive. You discover a problem. You file a claim. You wait for the builder to respond. You wait for them to schedule a repair. You wait for the work to be completed. Each step introduces delays — and the builder controls the timeline.
In practice, warranty repairs in the GTA can take weeks to months to schedule. For non-urgent items, some builders push repairs to quarterly service visits. And the quality of warranty work varies widely — some builders send skilled tradespeople, others send the cheapest available subcontractor.
Some items are contested. Builders can dispute warranty claims. They can argue that an issue is within "normal tolerances" or is the result of homeowner action. If you didn't document the issue during the PDI, you're in a weaker position to prove it was present at possession.
Tarion doesn't cover everything. Cosmetic items like paint, caulking, and minor drywall imperfections have limited coverage windows. Grading issues — the most expensive deficiency I find — are covered under the first-year warranty, but proving that the grade was incorrect at possession (rather than due to natural settling) is much harder without documented evidence from a professional inspection at the time of the PDI.
The key insight: Tarion is your safety net. The PDI inspection is your first line of defense. Problems caught during the PDI get fixed before closing — on the builder's schedule, at the builder's expense, with your leverage at its peak. Problems caught through warranty get added to a queue.
How PDI Inspection and Tarion Work Together
The most effective approach is to use both strategically. A professional PDI inspection documents every visible deficiency before you sign off. This serves two purposes: immediate leverage to get the builder to address items before closing, and a documented baseline for any warranty claims you file in the first year.
If an item from the PDI isn't resolved before closing, it goes on the PDI form — and the builder is obligated to address it under Tarion guidelines. If a new issue appears in the first 30 days, you submit it on your 30-day form. At the one-year mark, you submit a Year-End form for anything that developed over the first 12 months.
A professional PDI inspection gives you the documentation you need to make every one of those submissions specific, credible, and hard to contest.
The Cost Comparison
A PDI inspection costs $299. It gives you a complete deficiency list — documented with photos — before you sign. A single warranty claim that gets contested or delayed can cost you hundreds in temporary fixes, days off work waiting for repair visits, and months of living with an unresolved issue.
Tarion warranty is your protection after closing. A PDI inspection is your protection before closing. You need both — and the one that saves you the most money and frustration is the one that happens first.