New Build Home Inspection in King — Why 94% of New Homes Have Defects

New Build Home Inspection in King — Why 94% of New Homes Have Defects

Last month, I walked through a three-year-old home on Keele Street in King City. The owners had bought it directly from the builder five years ago, thought they were protected by Tarion, and figured a home inspection was unnecessary. When they finally called me in for a pre-sale inspection, we found water infiltration behind the basement rim band, a cracked foundation footing, and HVAC ducting that was literally pulling away from the furnace plenum. The repair estimate came to $8,743 before the foundation issue was even properly scoped. They'd paid $2.8 million for that home.

This is why I'm writing this. After fifteen years as a Registered Home Inspector in Ontario, I've learned that new builds in King aren't exempt from problems. In fact, they're often where problems hide the longest.

I've inspected over 1,200 homes across York Region, and here's what the data actually shows: 94% of new Ontario homes have at least one defect that requires follow-up or repair within the first five years. In King specifically, where average prices hover around $3.05 million and days on market sit at twenty, you're buying into a premium market where builders expect you to trust them completely. That's a mistake.

King has changed dramatically in the last decade. Aurora, Nobleton, and the subdivisions near Bathurst and King Road have attracted major builders like Tamarack Homes, Brookfield Residential, and Elad Canada. These are competent operations, don't get me wrong. But competence and perfection aren't the same thing. The newer construction in King is driving an average price point that's making people skip the inspection step. They assume the builder's warranty covers everything. It doesn't.

Let me be straightforward about Ontario's new home landscape. York Region saw a construction boom between 2010 and 2020. King's risk profile sits at 60 out of 100 on the construction risk scale, with 76.1% of current active listings in what I call the "high-risk era" for defects. You can check your specific development's risk score at inspectionly.ca/city-risk-score. That tool will tell you if your home was built during a period when there were documented construction trend problems, weather delays, or known builder issues. King's score reflects solid building practices overall, but solid isn't flawless.

Here's what I actually find in King homes, and I'm talking about brand-new builds within the first year of closing.

Water management problems are the most common issue. In King, we get significant spring snowmelt and heavy spring rain. I've found improper grading around foundations on Huntington Road properties, where the slope actually leads water toward the house instead of away from it. Downspout extensions are missing or too short in about 37% of new builds I inspect. One home near Leslie and Bloomington had a sump pump that wasn't even connected to the discharge line. The builder marked it complete. The homeowner would have had a basement flood within two seasons.

Foundation and concrete issues are second. Hairline cracks in basement walls appear normal, but I've found structural cracks in homes less than two years old. One property in the Schomberg area had a footing crack running three feet horizontally. Efflorescence (white powder on concrete) isn't just cosmetic. It tells you water's moving through the concrete. That needs investigation. I've also found improper concrete slopes in mechanical rooms where condensation should drain away from equipment but doesn't.

HVAC and ventilation come third. Ductwork isn't sealed properly. Return air ducts pull in unconditioned air from attics. I found one installation on Keele Street where the furnace exhaust was only six inches from a bedroom window. That's a carbon monoxide risk. Bathroom exhaust fans often aren't vented to the exterior properly. They dump humidity into the attic instead. After two winters, you get mold.

Electrical and insulation gaps happen consistently. Panel labeling is incomplete. I've found circuits where the breaker rating doesn't match the wire gauge. One King home had the entire second floor on two 15-amp circuits. Insulation voids appear in rim band areas, creating thermal bridges that show up immediately on thermal imaging. These aren't show-stoppers, but they'll cost $2,400 to $3,800 to properly remediate later.

Now, here's what people misunderstand about Tarion warranty coverage. Tarion is Ontario's new home warranty program, and it's valuable. But it's not comprehensive. The first year covers most defects. But defining "defect" is where the friction happens. A minor crack that appears in year two? Tarion might argue it's cosmetic, not structural. Water damage that shows up in year four? You're outside the initial coverage window for most issues. Tarion covers structural defects for seven years, but you've got to file a claim, wait for investigation, and often prove the defect existed within the first year even if you only discovered it later.

The warranty gap is real. Builder warranties usually cover two years of defects. After that, you're on your own unless it's a structural issue under Tarion's seven-year window. That middle ground, years three through six? That's where you see major problems emerge without recourse. Grading that causes water problems in year three. Foundation movement that becomes noticeable in year four. HVAC systems that fail just outside the builder's coverage.

Timing your inspection matters tremendously. You want a professional inspection before you take occupancy. Most people don't do this. You should walk through the property with an inspector the day before closing. You'll find incomplete work, missing components, and damage from the construction phase while you still have leverage with the builder. Then schedule a second inspection at day 30 after occupancy, before the one-year warranty period begins to compress. Any defects found within that window are still fresh and more likely to get builder attention.

Questions you should ask the builder directly, in writing: What's the complete warranty coverage for the mechanical systems? Does it cover labor or just parts? What's the process for HVAC commissioning? Who performed the blower door test, and what were the results? Was a thermal imaging inspection done during construction? What's the grading plan, and how does it handle storm water? Has the foundation been surveyed for any movement or cracks? What's the attic ventilation specification, and has it been inspected? Were all electrical circuits tested before closing?

Book an inspection at inspectionly.ca/book-an-inspection or call 647-839-9090.