Kitchen Inspection — Plumbing, Electrical, and Ventilation

Walking into the master bathroom on Speers Road last Tuesday, I caught that telltale musty smell before my flashlight even hit the baseboard behind the toilet. The homeowner had done a beautiful renovation job with marble countertops and heated floors, but when I pressed my moisture meter against that back wall, the readings spiked to 28 percent. After 15 years of inspections, I know that smell means one thing: hidden water damage that's going to cost someone serious money.

Bathrooms are where dreams of homeownership can turn into nightmares faster than anywhere else in the house. I've seen $47,000 renovation budgets because of issues that started as a small leak behind a vanity. What I find most concerning is how many buyers get distracted by the pretty fixtures and miss the real problems lurking underneath.

In these 1960s to 1990s Oakville homes, I'm dealing with original plumbing that's pushing 30 to 60 years old. The copper pipes are starting to show their age. The cast iron drain lines are corroding from the inside out. You'll find galvanized steel supply lines that should have been replaced decades ago.

Last month in Old Oakville, I found a bathroom where the previous owners had installed a gorgeous walk-in shower without updating the underlying waterproofing. Beautiful Italian tile, rainfall showerhead, the works. But water had been seeping through the grout lines for months, rotting out the subfloor and traveling down to damage the kitchen ceiling below. The repair estimate? $23,850.

Here's what buyers always underestimate about bathroom inspections: it's not about whether the toilet flushes or the faucet turns on. Those are the easy parts. I'm looking for signs of long-term moisture intrusion that can compromise the entire structural integrity of that space.

I start every bathroom inspection the same way. Floors first. I'm checking for soft spots around the toilet base, looking for any give in the flooring that suggests subfloor damage. In these older Oakville homes, you'll often find multiple layers of flooring that previous owners just installed over top of existing problems. Vinyl over linoleum over hardwood over the original subflooring creates a perfect environment for moisture to get trapped and cause rot.

The toilet gets my full attention next. I'm not just flushing it once and moving on. I'm checking the wax ring seal, looking for any movement when I put pressure on the base, examining the bolts and the condition of the flange underneath. A loose toilet can cause thousands in damage before you even notice there's a problem.

Guess what I found in a Glen Abbey home just last week? The toilet had been rocking slightly for probably two years. The homeowners thought it was normal. That movement had completely destroyed the wax ring seal, allowing sewage water to leak under the flooring every single time someone flushed. The bathroom had to be gutted down to the joists. Total cost: $31,200.

Ventilation is another area where I see consistent problems in these housing eras. The original bathroom fans were often undersized for the space and many homeowners never had them upgraded. Poor ventilation leads to excessive humidity, which leads to mold growth, which leads to health problems and expensive remediation.

I always check whether the exhaust fan actually moves air or just makes noise. You'd be surprised how many fans are running but not actually venting anywhere useful. I've found bathroom fans venting into attic spaces, into wall cavities, even into the space between floors. That's just moving the moisture problem somewhere else in the house.

The shower and tub areas require the most detailed examination. I'm looking at caulking lines, checking for any gaps or deterioration that could allow water penetration. Original tile installations from the 1970s and 1980s often used grout that wasn't designed to handle today's water pressure and usage patterns.

What really concerns me is when I see fresh caulking in a bathroom that otherwise shows its age. That tells me someone was trying to address a water intrusion problem, and I need to dig deeper to understand what's really happening behind those walls.

In April 2026, with the spring weather bringing humidity levels up, these moisture issues become even more problematic. I always tell my clients that bathroom problems don't stay bathroom problems. Water finds a way to travel, and it usually heads toward the most expensive areas to repair.

The electrical systems in older bathroom renovations often weren't brought up to current code standards. I'm checking for GFCI protection, proper ventilation fan wiring, and safe electrical clearances around water sources. A bathroom electrical upgrade can easily run $3,400 to $5,200 depending on how much rewiring is needed.

One thing that always surprises people is how often I find structural issues that started in the bathroom. Water damage doesn't respect room boundaries. I've traced bathroom leaks that caused foundation problems, damaged load-bearing walls, and created mold issues in completely different parts of the house.

The plumbing behind the walls gets my attention too. I'm listening for unusual sounds when fixtures are running, checking water pressure at multiple outlets, and looking for any signs of previous repairs that might indicate ongoing issues. In 15 years, I've never seen a quick plumbing patch job hold up long-term without proper repairs.

Your bathroom inspection isn't something to rush through or take lightly, especially in these older Oakville properties where systems are aging and previous renovations might not have addressed underlying problems. Get a thorough inspection before you commit to buying, because bathroom surprises after closing are never pleasant ones.