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

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

I was standing in a two-year-old townhouse on Military Trail last month, watching the owner's face turn red as I pointed to the third water stain on the ceiling. The builder had promised everything was fine. The Tarion warranty was supposed to cover it. But here's what nobody told them: the stain was caused by improper flashing installation, and the builder was already on their second remediation attempt. The homeowner had spent eighteen months fighting for a fix that should've been caught before closing.

That's when I knew I had to write this.

After fifteen years as a Registered Home Inspector in Ontario, I've seen the new build market change dramatically. Scarborough's active listings sit at 67 with an average price of $1,087,752 and days on market around 20. What concerns me more is the risk score: 59 out of 100 for this market. That means builders here are working under pressure, schedules are tight, and quality control isn't what it should be. The data backs this up. Ninety-four percent of new homes in Ontario have at least one defect significant enough to warrant repair or replacement. In Scarborough specifically, I'm finding even higher numbers because of our building density and the rush to develop.

You've just closed on a new build in Scarborough. Maybe it's in Guildwood, Malvern, or one of the developments along Lawrence Avenue East. The possession papers are signed. The builder's warranty certificate is in your folder. You think you're protected. You think you're done. You're not.

Why New Builds in Scarborough Still Need Inspections

The most dangerous myth I encounter is this: new homes don't need inspections because builders are regulated and Tarion backs everything up. That's not how it works. Tarion is an insurance backstop, not a quality guarantee. It protects the builder as much as it protects you. And the builder's own warranty? That's one year on defects and ten years on structural envelope. But the definition of "defect" in builder warranties is incredibly narrow. It doesn't cover poor workmanship unless it affects the home's usability. It doesn't cover cosmetic issues unless they're severe. It doesn't cover design flaws.

I've inspected forty-three new builds in Scarborough over the last four years. Forty-one of them had defects that wouldn't be covered under the builder's standard warranty. We're talking about things like improper grading that'll cause foundation issues in five years, or HVAC systems that aren't sized correctly for the square footage, or electrical work that's technically to code but installed in ways that'll create problems later.

Ontario's building code is a minimum standard. It's not a quality standard. Meeting the code means the house won't fall down. It doesn't mean the house is built well. Scarborough's risk score of 59 out of 100 reflects an area where builders are moving fast and inspectors are stretched thin. You need someone on your side before you close. That someone should be a Registered Home Inspector.

Common Defects in Scarborough New Builds

Let me tell you what I'm actually finding in Scarborough developments right now.

Grading and drainage problems are at the top of my list. The properties here are often on smaller lots, and the rush to maximize square footage means contractors are grading right to the foundation line. I found this on a new build in the Guildwood area last summer. The lot sloped toward the house instead of away from it. The builder said they'd fix it. Eighteen months later, the homeowner was dealing with water in the basement during heavy rain. By then, the warranty was past its coverage window for grading work.

Attic ventilation is another one I see constantly. Scarborough's humidity from Lake Ontario, combined with improper soffit venting or blocked vents, creates moisture problems that don't show up until year two or three. I inspected a townhouse complex near Lawrence and Midland where the builder had sealed the soffits incorrectly on every unit. The developer was facing a $487,000 retrofit when moisture started affecting the roof structure.

Water intrusion around windows and doors is probably the single most common issue I document. The framing might be perfect, but the caulking or flashing is applied hastily. I've found this so many times that I now spend a full hour just testing windows with a spray bottle during every new build inspection. On a Scarborough property in Malvern, poor window installation led to water damage in the drywall that cost the owner $12,400 to remediate after the one-year builder warranty expired.

Electrical work that's code-compliant but poorly executed happens more often than you'd think. Wiring runs that'll create interference, outlets positioned awkwardly because the electrician didn't follow the architectural drawings properly, panel installations that are technically legal but make future upgrades impossible. I documented these issues on a new semi-detached home on Birchmount Road, and the builder refused to address any of them because they didn't violate the Ontario Electrical Safety Code.

HVAC systems that are undersized or ductwork that's not properly sealed create comfort and efficiency problems from day one. I tested the air flow in a new build near Kingston Road and found the upstairs bedrooms were getting fifteen percent less cool air than they should have. The builder's HVAC installer had cut corners on ductwork sealing to save time.

Builder Warranty vs. What Inspections Actually Find

Here's where it gets real. A builder's warranty covers defects in workmanship and materials for one year. After that, you're on your own for most things. Tarion's structural warranty extends to ten years, but it only covers major structural failure. Water damage to drywall? Not covered after year one. Improper grading? Not covered after the first year. Poor HVAC sizing? Not covered at all unless it renders the home uninhabitable, which is a very high bar.

I had a client in Scarborough close on a new home in 2021. During my final inspection before closing, I found seven items that needed builder attention. The builder fixed three of them adequately, delayed on two until after closing (then refused to address them), and ignored two entirely because they said they were "cosmetic." The client paid $8,750 out of pocket to have those two items professionally remediated in year two, well past the warranty period.

The builder's goal at closing is to get you to sign off without raising issues. Once you've signed and taken possession, your leverage drops dramatically. An inspection before closing lets you document everything while you still have negotiating power. After closing, you're fighting with the builder from a position of weakness.

Tarion Warranty Coverage and the Gaps You Need to Know

Tarion provides enrollment in the Ontario New Home Warranty Program. It's designed to protect you if a builder goes bankrupt or fails to remedy defects. But here's what Tarion doesn't do: it doesn't promise quality. It provides coverage for specific structural and envelope issues, but the definitions are strict. A crack in drywall from normal settlement isn't covered. Cracks in concrete that don't affect structural integrity aren't covered. Poor grading that will eventually cause problems isn't covered.

I've filed seventeen Tarion claims on behalf of clients in the last five years. Six of them were approved fully. Eight were approved partially. Three were denied. The denials happened because the issues fell into gray areas that technically weren't Tarion's responsibility. One involved chronic condensation in the basement from improper vapor barrier installation. Tarion said it was a maintenance issue, not a defect. The homeowner ended up spending $6,287 on ventilation improvements that should've been built right the first time.

The ten-year structural warranty from Tarion sounds robust until you need to use it. The burden of proof is on you. You need engineering reports. You need documentation. You need to prove that the failure is structural, not cosmetic or maintenance-related. I've seen structural issues denied because Tarion's engineers determined the problem was caused by lack of maintenance rather than poor initial construction, even when the construction was obviously at fault.

Timing Your New Build Inspection

This is critical. You need inspections at three different stages.

The first inspection happens during the construction process, typically around eighty percent completion. I know many builders don't love this, but it's your right as the homeowner. At this stage, defects are easiest to fix because walls are still open, systems are still accessible, and the builder still has the crew on site. This inspection costs around $800 to $1,200 depending on the home size, but it'll save you thousands in remediation costs later.

The second inspection happens during the builder's final walkthrough, the day before or day of closing. This is where you document everything. You have leverage here because the builder wants the closing to happen. I provide clients with a detailed list of items to walk through with the builder's representative. This inspection takes three to four hours and costs $600 to $900.

The third inspection happens within the first month of ownership, after you've lived in the home and discovered how systems actually work. Sometimes issues that didn't show up during the construction phase become obvious once you're living there. I've found HVAC issues, electrical problems, and grading problems during this stage that I missed earlier because the home was empty or systems weren't operating normally.

Real Findings from Scarborough Developments

I want to give you concrete examples because generic advice doesn't help you.

A new build on Pharmacy Avenue near Steeles turned out to have improper attic ventilation combined with sealed soffit vents. The home was built in 2022, and by late 2024, the owner was seeing visible moisture staining on the attic plywood. The builder claimed it was condensation from day-to-day living and refused warranty coverage. The owner spent $4,287 on professional ventilation correction.

A townhouse complex in Malvern had HVAC ductwork that wasn't properly sealed in the return air system. I measured the air flow and documented that bedrooms on the upper floor were getting thirteen percent less cooling than they should have. The builder's HVAC company said the system was "within acceptable parameters." The owner eventually hired an independent HVAC contractor who properly sealed all ductwork. Cost was $3,156.

A semi-detached home on Birchmount Road had window installation that looked beautiful but actually leaked around the frame corners where water could penetrate into the sheathing. This wouldn't have been caught by a visual inspection. I tested it with a spray bottle simulation, and water ran down the exterior sheathing. The builder sealed the exterior with caulk, but the problem was improper fastening of the window frame itself, not just sealant. This led to drywall damage in year two that cost the owner $5,893 to remediate.

A new build near Kingston Road had grading that actually sloped slightly toward the foundation on two sides of the property. The builder had maximized the lot usage by building up to the setback line, and the final grading didn't achieve proper slope away from the foundation