As a Registered Home Inspector serving the Agincourt area for over a decade, I've walked through hun

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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 the Agincourt area for over a decade, I've walked through hundreds of homes and seen patterns emerge that every homeowner should know about. The established neighborhoods in this corner of Scarborough present unique challenges, with many homes built during specific eras that brought common construction practices and materials that don't always stand the test of time.

Let me share the five most frequent issues I encounter during home inspections in Agincourt, along with what you can expect to invest in addressing them. Understanding these potential problems before you buy or sell can save you thousands of dollars and countless headaches down the road.

Aluminum wiring tops my list of concerns, and I find it in roughly 40% of homes built between 1965 and 1975 in this area. While aluminum wiring isn't inherently dangerous when properly maintained, it expands and contracts more than copper, leading to loose connections that can create fire hazards. Insurance companies often require updates or charge higher premiums for homes with aluminum wiring. Complete rewiring typically runs between $8,000 and $15,000 depending on the home size, though some homeowners opt for the more affordable solution of installing special connectors and outlets designed for aluminum wire, which costs around $2,000 to $4,000.

Poly-B plumbing represents another era-specific challenge I regularly encounter in Agincourt homes. Installed primarily from the late 1970s through the 1990s, polybutylene pipes were initially praised for being flexible and affordable. However, they're prone to becoming brittle and developing leaks, particularly at joints and fittings. When I find Poly-B systems during inspections, I always recommend planning for replacement within five years. Full replacement with PEX or copper piping ranges from $6,000 to $12,000, depending on accessibility and home size.

Foundation issues present themselves differently across Agincourt's varied housing stock. I frequently find settling cracks in poured concrete foundations and step cracks in concrete block foundations. While hairline cracks under 1/8 inch are often cosmetic, anything wider or showing signs of movement requires immediate attention. Minor crack repairs might cost $500 to $1,500, but major foundation work involving excavation and structural repairs can reach $15,000 to $25,000 or more.

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Roofing problems are inevitable in our climate, and I see everything from missing shingles to complete system failures. The freeze-thaw cycles we experience in this region are particularly hard on roofing materials. Asphalt shingles typically last 20 to 25 years in our climate, but I often find homes where maintenance has been deferred. Partial roof repairs might run $2,000 to $5,000, while complete replacement ranges from $8,000 to $18,000 depending on the roof size and material choices.

HVAC system failures round out my top five, particularly with forced air furnaces and central air systems that have exceeded their expected lifespan. I recently inspected a beautiful semi-detached home on Mcnicoll Avenue where the original 1978 furnace was still operating, though barely. The homeowners had been nursing it along with expensive annual repairs, not realizing they were spending more on maintenance than a new system would cost. Furnace replacement typically runs $3,000 to $6,000, while adding central air to an existing system costs $3,500 to $7,000.

What makes these issues particularly challenging for Agincourt homeowners is that they often appear in combination. That Mcnicoll Avenue property I mentioned also had Poly-B plumbing and several foundation cracks that needed monitoring. The buyers were able to negotiate a fair price reduction and prioritize the most critical repairs first.

The key is understanding that these aren't necessarily deal-breakers, but rather opportunities for informed decision-making. When I find these issues during pre-purchase inspections, I always remind my clients that knowledge is power. Knowing about problems upfront allows you to budget appropriately and negotiate from a position of strength.

Every home has its story, and these common issues are simply chapters in Agincourt's housing narrative. With proper professional assessment and realistic budgeting, most problems can be addressed systematically over time. Remember, a thorough home inspection isn't meant to scare you away from a property, but to help you make the most informed decision possible about one of life's biggest investments.

Stay informed, and don't hesitate to reach out if you have questions about any property you're considering in our wonderful community.

Warmly, Aamir Yaqoob, RHI

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