When you buy a new build home in Milton, Oakville, or anywhere in the GTA, the builder's representative will walk you through the home with a smile. They'll show you how the smart thermostat works. They'll demonstrate the kitchen range hood. They'll point out the upgraded quartz countertops.
What they won't do is walk you around the outside of the house and show you that the grading slopes toward your foundation. They won't open the mechanical room and show you the disconnected HVAC damper. They won't get on their hands and knees to check under the kitchen sink for a slow leak.
Here are seven deficiencies I find in new builds across Ontario — consistently — that builders will never volunteer.
1. Improper Grading and Drainage
This is the big one. In new developments across Milton, Halton Hills, and Oakville, I regularly find lots where the soil is graded to direct water toward the foundation instead of away from it. This isn't a cosmetic issue — it's a direct path to basement moisture, efflorescence on foundation walls, and long-term structural damage.
The fix after possession? Regrading a lot can cost $3,000 to $15,000 depending on severity, accessibility, and whether hardscaping needs to be removed and replaced. If the builder fixes it before closing, it costs you nothing.
2. Disconnected or Improperly Balanced HVAC
Your furnace turns on. It blows air. You assume it's working. But in new builds, I routinely find disconnected ductwork runs, missing balancing dampers, and improperly connected zones that result in rooms that are too hot, too cold, or not receiving any conditioned air at all.
You won't notice this during a PDI walkthrough in spring or fall. You'll notice it during the first heat wave in July or the first cold snap in January — months after you've signed off and lost your leverage.
Pro tip: I test every register in the home with an airflow check. If a room isn't getting air, it gets documented. This is one of the most commonly missed items at PDIs.
3. Windows That Don't Seal or Lock Properly
New build homes in Ontario typically have 15–30+ windows. At a PDI, most buyers open maybe two or three. I check every single one — operation, locking mechanism, seal integrity, and glass condition. It's common to find windows that don't lock, don't close flush, or have broken thermal seals right out of the factory.
A single window replacement can cost $300–$800 installed. Multiply that by the 3–5 problem windows I typically find per home.
4. Plumbing Leaks Hidden Behind Cabinetry
Supply line connections under kitchen sinks, bathroom vanities, and behind toilets are a frequent source of slow leaks in new builds. These connections are often the last things installed and the first things to fail. Because they're hidden behind cabinetry and pedestals, buyers don't check them — and builders don't flag them.
A slow leak under a kitchen sink can destroy flooring, cabinetry, and subfloor within weeks. Water damage remediation in a kitchen starts at $3,000 and goes up fast.
5. Electrical Panel Labeling and Safety Issues
I regularly find electrical panels in new builds that are mislabeled, have missing knockout covers, or contain circuits that don't match the panel schedule. I also find GFCI outlets that aren't installed where Ontario code requires them — typically in bathrooms, kitchens, and exterior locations.
These are safety issues. They should never make it to possession day. But they do — regularly.
6. Missing or Incomplete Caulking
Caulking is one of those items that seems minor until you understand what it does. Exterior caulking around windows, doors, and wall penetrations prevents water infiltration. Interior caulking around bathtubs, showers, and backsplashes prevents moisture from reaching subfloors and wall cavities.
In new builds, I find missing or incomplete caulking in virtually every home. Builders rush through this final step because it's time-consuming and low-priority compared to major systems. But the water damage that results from missing caulking is anything but minor.
7. Foundation Cracks
Not all foundation cracks are structural. Hairline shrinkage cracks in poured concrete are normal. But cracks wider than 1/8", horizontal cracks, or cracks that show active water seepage are problems — and they need to be documented before you take possession.
I inspect accessible foundation walls in the basement, garage, and exterior. If I see something that warrants further evaluation, I'll tell you exactly what it is and what the next step should be.
Why Builders Don't Mention These
Builders aren't being malicious. They're running a business with tight margins, aggressive timelines, and dozens of homes under construction simultaneously. Their PDI representatives are customer service staff — not construction inspectors. They're trained to manage your experience, not to audit the work.
That's why you need someone in the room whose only job is to protect your interests. Someone with 15+ years of construction experience who knows exactly where to look.
A $299 PDI inspection can save you $5,000–$20,000 in post-closing repairs. That's not marketing — it's math.