As a Registered Home Inspector serving King City, Ontario, I've walked through hundreds of homes ove

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Aamir Yaqoob, RHI

RHI Certified · OAHI Member · InterNACHI · E&O Insured

April 7, 2026 · 4 min read

As a Registered Home Inspector serving King City, Ontario, I've walked through hundreds of homes over the years, from charming heritage properties to modern builds. Each inspection tells a story, and certain issues keep appearing with remarkable consistency. Understanding these common findings can help homeowners prepare for maintenance needs and buyers make informed decisions about their potential new home.

Aluminum wiring tops my list of frequent discoveries in King City homes built between 1965 and 1975. This material was popular during a copper shortage but has since proven problematic due to expansion and contraction issues that can create loose connections. The real concern lies in potential fire hazards when aluminum wiring isn't properly maintained or connected with appropriate materials. Homeowners typically face replacement costs ranging from $8,000 to $15,000 for a complete rewiring, though partial updates might run $2,000 to $5,000 depending on the scope.

Poly-B plumbing represents another significant finding in homes from the late 1970s through early 1990s. These gray plastic pipes were once considered innovative but have proven prone to brittle failure, especially at connection points and when exposed to chlorine in municipal water supplies. I regularly find evidence of previous leaks or stress fractures during my inspections. Complete replacement typically costs between $12,000 and $20,000, while partial repairs might range from $3,000 to $8,000 based on accessibility and extent of the work needed.

Foundation issues appear in various forms across King City's diverse housing stock. Settlement cracks, water intrusion, and structural concerns related to our freeze-thaw cycles create ongoing challenges for homeowners. Minor crack repairs might cost $500 to $2,000, while major foundation work can range from $10,000 to $30,000 or more. The key lies in early detection and proper assessment to prevent small issues from becoming major structural problems.

Roof wear reflects both age and our challenging Ontario weather conditions. Asphalt shingles typically show wear patterns after 15-20 years, while cedar shakes and metal roofing have their own maintenance requirements. I often find missing or damaged shingles, compromised flashing, and guttering issues that require attention. Basic repairs run $1,000 to $3,000, while full replacement costs vary from $15,000 to $35,000 depending on materials and complexity.

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HVAC system failures round out my top five findings, particularly in older forced-air systems and aging heat pumps. Ontario's temperature extremes put significant stress on heating and cooling equipment, leading to premature wear when systems aren't properly maintained. Repair costs range from $500 for minor issues to $8,000 or more for complete system replacement.

Just last month, I inspected a beautiful 1980s home where the sellers had been meticulous about cosmetic updates but overlooked critical systems. Within two hours, I discovered aluminum wiring with improper connections, Poly-B supply lines showing stress marks, a foundation crack allowing moisture intrusion, worn roof shingles, and an aging furnace with a cracked heat exchanger. The buyers appreciated having this information upfront, allowing them to negotiate repairs and budget for future updates rather than facing unexpected emergencies after moving in.

These findings shouldn't discourage potential buyers or overwhelm current homeowners. Every house requires maintenance, and knowing what to expect helps with planning and budgeting. Regular professional inspections, even for current homeowners, can catch issues early when they're less expensive to address. Many of these problems develop gradually, making them easier to manage when identified promptly.

Working with qualified contractors who understand local building codes and climate challenges makes a significant difference in both repair quality and longevity. I always recommend getting multiple quotes for major work and ensuring proper permits are obtained when required.

King City's housing market continues to thrive because buyers and sellers work together with professionals who understand these common issues. My role involves providing clear, honest assessments that help families make informed decisions about their most significant investment.

Whether you're buying your first home or maintaining a longtime family residence, understanding these common inspection findings helps you approach homeownership with confidence. Feel free to reach out if you have questions about any of these issues or need recommendations for qualified contractors in our area.

Best regards, Aamir Yaqoob, RHI

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