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

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

I pulled up to a brand new semi-detached on Simcoe Street North in Oshawa last March. The builder's sign was still on the lawn. The homeowners had closed three weeks prior and felt they were getting a new home without worry. By the time I finished my inspection, I'd found seventeen defects ranging from improper grading that would cause water pooling near the foundation to an exhaust vent installed directly into the soffit instead of through the roof. The builder's list of "minor touchups" suddenly looked incomplete.

That's when I realized something important needs to be said in this market. Just because a home is new doesn't mean it's built right. And that's what I want to walk you through today.

I've been inspecting homes in the Durham Region for fifteen years now, and I've watched Oshawa's new construction boom accelerate significantly. We're seeing active listings near 343 units at any given time with an average price sitting around 819,278 dollars. Homes are moving fast, sometimes in under 20 days on market. That speed matters to me as an inspector because it tells me buyers are making decisions quickly, sometimes without stopping to verify the actual quality of what they're purchasing.

Here's the reality: Ontario data consistently shows that roughly 94 percent of newly constructed homes have at least one defect that doesn't meet building code or construction standards. That's not a failure of all builders. That's what happens when you scale construction, manage timelines, and work with multiple trade contractors on tight schedules. The defects I find range from minor cosmetic issues to structural and safety concerns that could cost thousands to remediate.

Let me start with why new builds absolutely need inspections, because I hear this objection regularly.

The first reason sits in that warranty document you receive at closing. The builder warranty, whether it's one year, two years, or five years depending on the builder and coverage type, covers only certain things. It doesn't cover cosmetic defects in most cases. It doesn't cover items already documented as acceptable before you take possession. And critically, it places the burden on you to identify problems and report them within specific timeframes. If you don't catch something in the first few weeks, you may have lost your chance to claim it.

The second reason is that builder quality isn't guaranteed by price point. I've found the same types of defects in 750,000 dollar homes and 950,000 dollar homes in Oshawa. The difference isn't always quality control. Sometimes it's contractor rotation, timing in the construction season, or how attentive the site supervisor happened to be that week.

The third reason matters most to me professionally: only a third-party inspection creates an independent record. When you hire me, I'm working for you, not the builder. That matters if you later need documentation of pre-existing conditions or if something covered under warranty needs proof of original condition.

Now let me tell you what I've been finding in Oshawa developments lately, because patterns emerge when you inspect dozens of new builds in the same neighbourhoods.

In the Windfields area where several new subdivisions have opened, I've consistently found grading issues. The soil slopes toward the foundation or pooling occurs near the basement walls after heavy rain. That's a moisture infiltration risk I found on Taunton Road East in four separate homes last year. Fixing improper grading after the fact costs between 3,500 and 8,500 dollars depending on the scope.

In developments closer to the downtown core and around Ritson Road South, I've documented poor ventilation installation in bathrooms and kitchens. Vents are routed into soffits or attics instead of properly exhausting through the roof with adequate termination caps. One home in that area had three separate vents terminating inside the attic, which would eventually cause moisture damage and potential mold growth. The remediation on that alone ran 4,287 dollars.

Electrical work presents another consistent pattern. I've found outlets installed in wrong positions, circuit breaker labeling that doesn't match actual circuits, and GFCI protection missing where it should be present by code. These aren't always visible unless you're testing and verifying like I do during an inspection.

Drywall finishing shows up frequently in my reports. Inadequate taping and mudding, joint compound cracks that appear within months, and textured finish applied over improperly prepared surfaces. In Oshawa's older new builds from the 2008 to 2015 period, I'm now finding issues where that original drywall work is deteriorating.

Let's talk about what the Tarion Warranty Program actually covers versus what homeowners think it covers.

Tarion, which is Ontario's new home warranty program, provides mandated coverage. The first two years cover all defects related to the building envelope, structure, and systems. After two years and up to seven years, you have coverage for structural defects and water penetration through the building envelope. From year seven to ten, you're covered only for certain structural elements.

Here's where it gets tricky: Tarion has significant gaps. Cosmetic defects aren't covered. Normal wear and tear isn't covered. Defects that result from lack of maintenance by the homeowner aren't covered. And critically, you must report defects in writing to the builder within a reasonable time frame. What's "reasonable"? That varies, and disputes happen regularly.

I've had clients discover mold in year three only to find that water penetration happened in year one but wasn't documented. Tarion's stance becomes "you should have reported this earlier." I've seen homeowners denied coverage for foundation settling that they believed was covered structural protection. The difference between structural settling and structural defect is debated in claim reviews.

The gap I see most often involves workmanship. If a contractor installed something incorrectly but it doesn't yet cause a system failure, Tarion may not classify it as a defect. That electrical issue I mentioned, or improper ventilation routing, or grading slope angles. These are construction quality problems that Tarion views as workmanship rather than defects in the technical sense.

This is exactly why a pre-possession inspection matters. You catch these items while the builder still has motivation to fix them. You have leverage before you close. After closing, you're managing two separate warranty pathways - the builder's warranty and Tarion - with different standards and different timelines.

Timing your inspection is something I want to spend a moment on because it's genuinely important.

The ideal timing is forty-eight hours before your closing date. You need access to the home, which the builder will typically grant during the final walkthrough period. At that stage, the home is complete, utilities are on, and you can test systems. You're not inspecting an empty house. You're inspecting a finished product.

Some builders will grant access two to three days earlier. Take it. More notice means less rush.

Never accept a builder's promise to "fix it after closing." I've seen homeowners discover that what the builder said would be corrected wasn't, and now they're without leverage. The inspection before closing gives you concrete leverage for correction before money changes hands.

I want to give you some real findings from Oshawa developments so you understand what you should be asking about during your own walkthrough.

A home I inspected on Bloor Street had the water heater relief valve discharge pipe routed straight down without proper termination protection. If that valve discharged, hot water would spray onto the floor without warning. The builder corrected it after my report and before closing.

A brand new home in the Harmony development had the main water shut-off valve installed in an inaccessible location behind cabinetry. In an emergency, you'd waste precious time accessing water shutoff. That required correction and rerouting before closing.

A semi-detached in Whitby near the Oshawa boundary had exterior caulking applied over wet or contaminated surfaces, which meant it wouldn't adhere properly and would fail within eighteen months. Caught before closing, the builder arranged proper caulk removal and reapplication.

Another home had the gas line for the dryer installed through an exterior wall without proper sealing. That's a code violation that creates a thermal bridge and a potential energy loss point. Fixed before closing.

Here's what you should ask the builder during your final walkthrough, and I'm serious about writing these down or recording the conversation.

Ask about any defects or construction issues they're aware of and have documented. Most builders will have a list. That list should match what you want corrected before closing.

Ask about the grading plan and whether it was inspected by the city. Request the grading certificate if available. Ask specifically if any grading work is planned after your closing because that affects drainage patterns around your home.

Ask about the property survey and whether the foundation footprint matches the surveyed boundaries. Foundation encroachment issues are rare but catastrophic if they occur.

Ask which trades performed which work and whether any were subcontracted out. This matters because consistency of quality sometimes depends on how well the builder coordinated different contractors.

Ask about the building envelope sealing process. How were gaps around windows, doors, and penetrations sealed? What material was used? This directly affects drafts and moisture infiltration.

Ask about the HVAC commissioning. Was the system balanced by a certified technician? Does the builder have documentation? Unbalanced systems lead to comfort issues and energy waste.

Ask about the electrical system documentation. Do you have a complete circuit breaker label map? Are all outlets and switches tested?

Ask about any items discovered during the builder's own pre-closing walkthrough and how they were addressed.

Ask about the warranty claim process and what documentation you need to retain.

I always recommend checking the risk profile for new construction in Oshawa specifically. You can see the city-level data at inspectionly.ca/city-risk-score, which shows me that Oshawa currently scores 59 out of 100 on residential risk, with high-risk era homes comprising 77.8 percent of the local market. That helps contextualize where Oshawa sits in the broader regional picture.

New builds are a different animal from resale homes, but they're not exempt from the need for professional verification. Quite the opposite, actually. You've got better access to correction before closing, and you've got the leverage of an outstanding transaction. Use that window.

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